CN103841075B - Modulate method, equipment and the system of mapping, the method and apparatus of demapping - Google Patents

Abstract

The embodiment of the present invention discloses a modulation mapping method, including: acquiring data to be modulated, the data to be modulated includes n modulation bits; when n is an even number, dividing the data to be modulated into the first group of data and the second group Data; the first group of data and the second group of data are used as table look-up addresses respectively, and the first vector value corresponding to the first group of data containing the I branch signal is found from the first constellation diagram, and the second group The second vector value corresponding to the data includes the Q branch signal; combining the first vector value and the second vector value to obtain the first mapping symbol; performing QAM on the first mapping symbol to obtain the first ²ⁿ QAM modulation signal; Send the first 2 ⁿ QAM modulated signals to the receiving end. Correspondingly, the embodiment of the present invention also provides a modulation device, a modulation mapping system, and a demapping method and device. The embodiment of the present invention can reduce the depth of the table lookup in the process of modulation mapping and demapping, so as to save RAM resources.

Description

Method, device and system for modulation mapping, method and device for demapping

technical field

The present invention relates to the communication field, in particular to a modulation mapping method, device and system, and a demapping method and device.

Background technique

With the advent of the 3G era, the data volume of wireless services is increasing day by day, and the contradiction between limited bandwidth and high-speed growth of service throughput requirements is intensifying. Operators hope to increase service throughput as much as possible within limited bandwidth. A direct solution for operators is to adopt higher-order modulation technology, from 256 quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM) to 1024QAM, and even higher-order QAM.

By drawing all possible mapping relationships of a modulation mode on a complex plane, the constellation diagram of the modulation mode can be obtained, and a single mapped symbol point on the constellation diagram is called a constellation point. Obviously, 16QAM has 16 constellation points, and 256QAM has 256 constellation points. In this way, as the modulation order increases, the number of constellation points to be processed increases accordingly.

In the existing modulation technology, the modulation device constructs a lookup table based on random access memory (RAM), and the lookup table stores all mapped symbols in the modulation mode corresponding to the lookup table. During the modulation mapping process, the bit data As the address of the lookup table, read the mapping symbol corresponding to the address from the lookup table. The mapping symbol is specifically a vector including a real part and an imaginary part. The real part is called the I branch signal, and its imaginary part is called Q Tributary signal. The demodulation device constructs a lookup table in RAM, which stores bit data corresponding to all mapping symbols in the modulation mode corresponding to the lookup table. When the demodulation device receives the mapping symbols transmitted by the modulation device, it performs demapping. During the demapping process, the received mapping symbol is used as a table lookup address, and bit data corresponding to the address is read out from the lookup table.

In the above technology, the depth of the table lookup is 2 ⁿ no matter in the process of modulation mapping and demapping, where 2 ⁿ is the order of the modulation mode, such as 2 ⁿ is 256 in 256QAM, which consumes RAM in the process of modulation mapping and demapping The resources are huge.

Contents of the invention

Embodiments of the present invention provide a method and device for modulation mapping, and a method and device for demapping, which can reduce the depth of table lookup in the process of modulation mapping and demapping, so as to save RAM resources.

The first aspect of the present invention provides a modulation mapping method, including:

Obtaining data to be modulated, where the data to be modulated includes n modulation bits;

When n is an even number, equally dividing the data to be modulated into a first group of data and a second group of data according to a preset first division rule;

Using the first set of data as a look-up table address, look up the first vector value containing the I branch signal corresponding to the first set of data from a preset first constellation diagram containing mapping symbols;

Using the second set of data as a look-up table address, find a second vector value corresponding to the second set of data that includes the Q branch signal from the first constellation diagram;

combining the first vector value with the second vector value to obtain a first mapped symbol;

performing quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

Sending the first 2 ⁿ QAM modulated signal to a receiving end, so that the receiving end obtains the data to be modulated through data demodulation.

In a first possible implementation manner, the first group of data is used as a table lookup address, and the first constellation diagram corresponding to the first group of data is found from the preset first constellation diagram containing mapping symbols. The first vector values of the tributary signals include:

Using the first group of data as a selection address of a multi-choice logic circuit, selecting an I branch corresponding to the first group of data from the ^2n/2 I branch signals contained in the first constellation diagram Road signal, and using the selected I branch signal as the first vector value;

Said using the second group of data as a table lookup address, and finding the first vector value corresponding to the second group of data containing the Q branch signal from the preset first constellation diagram containing the mapping symbols includes :

Using the second group of data as a selection address of a multi-select logic circuit, select a Q branch corresponding to the first group of data from the ^2n/2 Q branch signals contained in the first constellation diagram channel signal, and use the selected Q branch signal as the second vector value.

With reference to the first aspect or the first possible implementation manner, in the second possible implementation manner, after obtaining the data to be modulated, the method further includes: when n is an odd number, divide the obtained data according to a preset second division rule The data to be modulated is divided into a third group of data and a fourth group of data, wherein the third group of data includes coset bits of n-t bits, the fourth group of data includes coded bits of t bits, and the t is greater than an integer of zero, and t<n;

Using the third group of data as a table look-up address, find out the second mapping symbol corresponding to the third group of data from the second constellation diagram that contains the mapping symbol set earlier; wherein, the second constellation diagram contains 2 ^nt regions, each of which contains 2 ^t mapping symbols;

Using the fourth set of data as a look-up table address, find a corrected offset vector corresponding to the fourth set of data from the area where the second mapping symbol is located in the second constellation diagram, and the corrected offset The vector contains the I branch signal and the Q branch signal;

adding the second mapping symbol to the modified offset vector to obtain a third mapping symbol;

performing quadrature amplitude modulation (QAM) on the third mapped symbol to obtain a second 2 ⁿ QAM modulated signal;

sending the second 2 ⁿ QAM modulated signal to a receiving end, so that the receiving end obtains the data to be modulated through data demodulation.

With reference to the second possible implementation manner, in the third possible implementation manner, after the data to be modulated is divided into a third group of data and a fourth group of data according to a preset second division rule, the Using the fourth set of data as a look-up table address, find a corrected offset vector corresponding to the fourth set of data from the area where the second mapping symbol is located in the second constellation diagram, and the corrected offset Before the vector contains the I branch signal and the Q branch signal, the method further includes:

Gray encoding the fourth group of data;

The fourth set of data is used as a table lookup address, and the correction offset vector corresponding to the fourth set of data is found from the area where the second mapping symbol is located in the second constellation diagram, and the correction The offset vector contains the I branch signal and the Q branch signal including:

The result of the gray encoding is used as a table lookup address, and the correction offset vector corresponding to the result is found from the area where the second mapping symbol is located in the second constellation diagram, and the correction offset vector includes 1 Branch signal and Q branch signal.

In combination with the second possible implementation, in the fourth possible implementation, the third group of data is used as a look-up table address, and the second constellation diagram containing the mapping symbols set earlier is found to be related to the The second mapping symbols corresponding to the third group of data include:

Using the third group of data as a selection address of a multiple-choice logic circuit, select the second corresponding to the third group of data from the reference mapping symbols preset in each area of the second constellation diagram. Map symbols.

A second aspect of the present invention provides a method for demapping, including:

The receiving and transmitting end sends 2 ⁿ QAM modulation signals;

Demodulating the 2 ⁿ QAM modulated signals to obtain mapped symbols;

When the n is an even number, use the first vector of the I-branch signal included in the mapping symbol as a look-up address, and find out the I-branch signal from the preset third constellation diagram containing bit data The corresponding first set of data;

Using the second vector of the Q branch signal included in the mapping symbol as a table lookup address, searching for a second group of data corresponding to the Q branch signal from the third constellation diagram;

Splicing the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

In a first possible implementation manner, when n is an odd number, demodulate the ²ⁿ QAM modulated signal, and after obtaining the mapped symbols, the method further includes:

Gray coding the lower t/2 bits of the I branch signal and the Q branch signal of the mapping symbol to obtain coded bit data;

The preset fourth constellation diagram containing bit data is shifted by shifting the origin mapping symbol of the region of the fourth constellation diagram to the translation track of the reference mapping symbol preset in the region; wherein, the fourth constellation diagram Contains 2 ^nt regions, each of which contains 2 ^t mapping symbols, t is a natural number, and t<n;

The I branch signal and the Q branch signal of the mapping symbol are respectively divided by t and rounded to an integer division operation, the I branch signal of the result of the division operation is multiplied by N, and the multiplication operation The result and the result of the Q branch signal of the division operation are used as a table look-up address, and the coset bit data is found from the shifted fourth constellation diagram; wherein, the N is the fourth constellation diagram The number of bit data of the row containing the most bit data;

Splicing the coded bit data and the coset bit data to obtain original data corresponding to the 2 ⁿ QAM modulated signal.

The third aspect of the present invention provides a modulation device, including: an acquisition unit, a first division unit, a first table lookup unit, a second table lookup unit, a merging unit, a first modulation unit, and a first sending unit, wherein:

The acquiring unit is configured to acquire data to be modulated, the data to be modulated includes n modulation bits;

The first division unit is configured to equally divide the data to be modulated into a first group of data and a second group of data according to a preset first division rule when n is an even number;

The first table look-up unit is configured to use the first set of data as a table look-up address, and find the I branch corresponding to the first set of data from the preset first constellation diagram containing mapping symbols the first vector value of the signal;

The second table lookup unit is configured to use the second group of data as a table lookup address, and find out from the first constellation diagram a second vector corresponding to the second group of data containing the Q branch signal value;

The merging unit is configured to combine the first vector value and the second vector value to obtain a first mapping symbol;

The first modulation unit is configured to perform quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

The first sending unit is configured to send the first 2 ⁿ QAM modulated signal to a receiving end, so that the receiving end obtains the data to be modulated through data demodulation.

In a first possible implementation manner, the first table look-up unit is also used to use the first group of data as a selection address of a multi-select logic circuit, from the ^2n/ Selecting an I branch signal corresponding to the first set of data from the ^two I branch signals, and using the selected I branch signal as a first vector value;

The second table look-up unit is also used to use the ^second set of data as a selection address of a multi-selection logic circuit, and select one and The Q branch signal corresponding to the first group of data, and the selected Q branch signal is used as the second vector value.

With reference to the third aspect or the first possible implementation manner, in a second possible implementation manner, the device further includes:

The second division unit is configured to divide the data to be modulated into a third group of data and a fourth group of data according to a preset second division rule when n is an odd number, wherein the third group of data includes n-t bits The coset bits of the fourth group of data include coded bits of t bits, the t is an integer greater than zero, and t<n;

The third table look-up unit is used to use the third group of data as a table look-up address, and find out the second mapping symbol corresponding to the third group of data from the second constellation diagram that contains the mapping symbol that is set earlier; wherein , the second constellation diagram includes 2 ^nt regions, each of which includes 2 ^t mapping symbols;

The fourth table look-up unit is used to use the fourth set of data as a table look-up address to find the corrected offset corresponding to the fourth set of data from the area of the second constellation where the second mapping symbol is located. A shift vector, the modified shift vector includes the I branch signal and the Q branch signal;

an adding unit, configured to add the second mapping symbol to the modified offset vector to obtain a third mapping symbol;

A second modulation unit, configured to perform quadrature amplitude modulation (QAM) on the third mapped symbol to obtain a second 2 ⁿ QAM modulated signal;

The second sending unit is configured to send the second 2 ⁿ QAM modulated signal to the receiving end, so that the receiving end obtains the data to be modulated through data demodulation.

With reference to the second possible implementation manner, in a third possible implementation manner, the device further includes:

a coding unit, configured to gray code the fourth set of data;

The fourth table look-up unit is also used to use the result of the gray encoding as a table look-up address, and find out the corrected offset corresponding to the result from the area of the second constellation diagram where the second mapping symbol is located vector, and the modified offset vector includes the I-branch signal and the Q-branch signal.

In combination with the second possible implementation manner, in the fourth possible implementation manner, the third table look-up unit is also used to use the third set of data as a selection address of a multiple-choice logic circuit, from A second mapping symbol corresponding to the third group of data is selected from reference mapping symbols preset in each area of the second constellation diagram.

A demodulation device provided by the fourth aspect of the present invention includes: a receiving unit, a demodulation unit, a first table lookup unit, a second table lookup unit, and a first splicing unit, wherein:

The receiving unit is used to receive 2 ⁿ QAM modulation signals sent by the transmitting end;

The demodulation unit is configured to demodulate the 2 ⁿ QAM modulated signals to obtain mapped symbols;

The first table look-up unit is configured to use the first vector of the I-branch signal included in the mapping symbol as a table look-up address when the n is an even number, from the preset third constellation diagram containing bit data Find out the first set of data corresponding to the I branch signal;

The second table lookup unit is configured to use the second vector of the Q branch signal included in the mapping symbol as a table lookup address, and find out the first vector corresponding to the Q branch signal from the third constellation diagram. Two sets of data;

The first splicing unit is configured to splice the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

In a first possible implementation manner, the device further includes:

An encoding unit, configured to gray-encode the lower t/2 bits of the I branch signal and the Q branch signal of the mapped symbol to obtain coded bit data when n is an odd number;

A translation unit, configured to translate the preset fourth constellation diagram containing bit data from the origin mapping symbol of the region of the fourth constellation diagram to the translation track of the preset reference mapping symbol in the region for translation; wherein, The fourth constellation diagram includes 2 ^nt regions, each of which includes 2 ^t mapping symbols, t is a natural number, and t<n;

The third table look-up unit is used to divide the I branch signal and the Q branch signal of the mapping symbol into a division operation divided by t and round, and multiply the I branch signal of the result of the division operation by the multiplication of N operation, and use the result of the multiplication operation and the result of the Q branch signal of the division operation as a table lookup address, and find out the coset bit data from the shifted fourth constellation diagram; wherein, the N is the number of bit data in the row containing the most bit data in the fourth constellation diagram;

The second splicing unit is configured to splice the coded bit data and the coset bit data to obtain original data corresponding to the 2 ⁿ QAM modulated signal.

A fifth aspect of the present invention provides a modulation mapping system, including: the above-mentioned modulation device and the above-mentioned demodulation device.

In the above technical solution, when the data to be equipped is an even number of bits, the data to be modulated is equally divided into the first group of data and the second group of data; respectively, the first group of data and the second group of data are used as table lookup addresses , find the first vector value corresponding to the first group of data containing the I branch signal from the preset first constellation diagram containing the mapping symbol, and the first vector value containing the Q branch signal corresponding to the second group of data The second vector value of the branch signal; combining the first vector value and the second vector value to obtain the first mapping symbol; performing quadrature amplitude modulation QAM on the first mapping symbol to obtain the first 2 ⁿ QAM modulation signal: sending the first 2 ⁿ QAM modulation signal to a receiving end, so that the receiving end obtains the data to be modulated through data demodulation. In this way, the table lookup will be performed twice, which can reduce the depth of the table lookup in the process of modulation mapping and demapping, so as to save RAM resources.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic flow chart of a modulation mapping method provided by the present invention;

FIG. 2 is a schematic flowchart of another modulation mapping method provided by the present invention;

FIG. 3 is a schematic diagram of a constellation diagram in an embodiment of the present invention;

FIG. 4 is a schematic diagram of another constellation diagram in an embodiment of the present invention;

Fig. 5 is a schematic flow chart of a demapping method provided by the present invention;

FIG. 6 is a schematic flowchart of another demapping method provided by the present invention;

Fig. 7 is a schematic structural diagram of a modulation device provided by the present invention;

Fig. 8 is a schematic structural diagram of another modulation device provided by the present invention;

FIG. 9 is a schematic structural diagram of a demodulation device provided by the present invention;

FIG. 10 is a schematic structural diagram of another demodulation provided by the present invention;

FIG. 11 is a schematic structural diagram of a modulation mapping system provided by the present invention;

Fig. 12 is a schematic structural diagram of another modulation device provided by the present invention;

Fig. 13 is a schematic structural diagram of another modulation device provided by the present invention;

Fig. 14 is a schematic structural diagram of another demodulation device provided by the present invention;

Fig. 15 is a schematic structural diagram of another demodulation provided by the present invention;

Fig. 16 is a schematic structural diagram of another modulation mapping system provided by the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 1 is a schematic flowchart of a modulation mapping method provided by an embodiment of the present invention, as shown in Fig. 1 , including:

101. Acquire data to be modulated, where the data to be modulated includes n modulation bits;

102. When n is an even number, equally divide the data to be modulated into a first group of data and a second group of data according to a preset first division rule;

103. Using the first set of data as a table lookup address, find a first vector value including I branch signals corresponding to the first set of data from a preset first constellation diagram including mapping symbols;

104. Using the second group of data as a table lookup address, find a second vector value corresponding to the second group of data that includes the Q branch signal from the first constellation diagram;

105. Combine the first vector value and the second vector value to obtain a first mapping symbol;

106. Perform quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

107. Send the first 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation.

When the receiving end receives the 2 ⁿ QAM modulated signal, it can demodulate the data to be modulated.

Optionally, the execution time of step 103 and step 104 may not be sequential, for example, step 103 and step 104 may be executed at the same time,

Optionally, assuming that the data to be modulated is 6 bits, step 101 may divide 3 bits of the data to be modulated into the first group of data, and divide the other 3 bits of data into the second group of data. In this way, the table look-up depth in step 103 is 2 ³ , and the table look-up depth in step 104 is 2 ³ . Compared with the table lookup depth of 2 ⁶ in the prior art, the table lookup depth is reduced.

As an optional implementation manner, the equipment for implementing this example may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, when the number of bits of the data to be modulated is an even number, the data that needs to be modulated and mapped is equally divided into the first group of data and the second group of data, and the first group of data is used as the table lookup address, from the preset Find out the first vector value containing the I branch signal corresponding to the first group of data in the first constellation diagram containing the mapping symbol, use the second group of data as the look-up table address, from the first Find out the second vector value containing the Q branch signal corresponding to the second group of data in the constellation diagram; combine the first vector value with the second vector value to obtain the first mapping symbol; performing quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal; sending the 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation. In this way, the depth of the table lookup in the process of modulation mapping and demapping can be reduced, so as to save RAM resources.

Fig. 2 is a schematic flowchart of another modulation mapping method provided by an embodiment of the present invention. As shown in Fig. 2, the method includes:

201. Acquire data to be modulated, where the data to be modulated includes n modulation bits.

202. When n is an even number, equally divide the data to be modulated into a first group of data and a second group of data according to a preset first division rule.

As an optional implementation manner, the foregoing first division rule may be preset based on the orthogonality characteristics of the I and Q branch signals in the mapping symbols included in the first constellation diagram. For example: such as the constellation diagram shown in Figure 2 for the above-mentioned first constellation diagram, the data to be modulated includes six bits of data ABCDEF, so that the above-mentioned first division rule can divide the bit data of the above-mentioned data such as ACE into the first Group data, dividing the bit data BDF at equal intervals into the second group data.

203. Using the first group of data as a table lookup address, look up a first vector value including I branch signals corresponding to the first group of data from a preset first constellation diagram including mapping symbols.

Optionally, the preset first constellation diagram containing mapping symbols may specifically be a constellation diagram as shown in FIG. The inner square is completely symmetrical.

As an optional implementation manner, step 203 may include:

Using the first group of data as a selection address of a multi-choice logic circuit, selecting an I branch corresponding to the first group of data from the ^2n/2 I branch signals contained in the first constellation diagram branch signal, and use the selected I branch signal as the first vector value.

Optionally, assuming that the number of bits of the data to be modulated is n, where n is an even number, the depth of the table lookup in step 203 is 2 ^{n /2} , specifically selecting an I branch from 2 ^n/2 I branch signals Signal. The I branch signal may specifically be the coordinate value of the abscissa or the coordinate value of the ordinate in the constellation diagram.

204. Using the second group of data as a table lookup address, find a second vector value corresponding to the second group of data that includes the Q branch signal from the first constellation diagram.

As an optional implementation manner, step 204 may include:

Using the second group of data as a selection address of a multi-select logic circuit, select a Q branch corresponding to the first group of data from the ^2n/2 Q branch signals contained in the first constellation diagram channel signal, and use the selected Q branch signal as the second vector value.

Optionally, assuming that the number of bits of the data to be modulated is n, where n is an even number, the depth of the table lookup in step 204 is 2 ^{n /2} , specifically selecting a Q branch from 2 ^n/2 Q branch signals Signal. Wherein, when the I branch signal is specifically the coordinate value of the abscissa in the constellation diagram, then the Q branch signal is the coordinate value of the ordinate in the constellation diagram; when the I branch signal is specifically The coordinate value of the ordinate in the constellation diagram, then the Q branch signal is the coordinate value of the abscissa in the constellation diagram.

205. Combine the first vector value and the second vector value to obtain a first mapping symbol;

206. Perform quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

207. Send the first 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation.

When the receiving end receives the above 2 ⁿ QAM modulation signal, it can know whether the number of bits of the data corresponding to the 2 ⁿ QAM modulation signal is even or odd. When the mapping is an odd number, the demodulation method corresponding to the odd number of bit data is used for demapping.

208. When n is an odd number, divide the data to be modulated into a third group of data and a fourth group of data according to a preset second division rule, wherein the third group of data includes coset bits of n-t bits, The fourth group of data includes coded bits of t bits, where t is an integer greater than zero, and t<n.

As an optional implementation manner, the above-mentioned second division rule may be preset based on the second constellation diagram provided by the embodiment of the present invention, and may be set according to the reference mapping symbols of each area in the second constellation diagram, that is, The reference mapping symbols of each region in the second constellation diagram are different from the set second division rules, wherein the reference mapping symbols of each region in the second constellation diagram have the same common position in each region, and There is only one reference map symbol in each area. For example: the second constellation diagram is shown in Figure 4, and the reference mapping symbol of each region is the mapping title in the lower left corner of each region, for example: the mapping symbol circled in Figure 4, so that the second division rule can be The least significant bit (Least Significant Bit, LSB) and the most significant bit (Most Significant Bit, MSB) of the bit data to be modulated are divided, that is, the bit data of the LSB of the data to be modulated can be the fourth group of data, that is, the encoded bit data , the bit data of the MSB of the data to be modulated is the third group of data, which is the coset bit data, so that the coset bit data is used as the table lookup address, and each area in the second constellation diagram can be found in the second constellation diagram Select a mapping symbol in the reference mapping symbol (for example, select the mapping symbol circled in Figure 4), and use the encoded bit data as the look-up table address to select a non-reference mapping in the area where the above-mentioned selected mapping symbol is located symbol.

209. Use the third group of data as a table lookup address, and find the second mapping symbol corresponding to the third group of data from the second constellation diagram that contains the mapping symbols set earlier; wherein, the second constellation The graph contains 2 ^nt regions, each of which contains 2 ^t mapped symbols.

As an optional implementation, the above-mentioned n and t can be different according to the constellation diagram, as shown in the constellation diagram in Figure 4, each area in Figure 4 contains 16 constellation points, then the above-mentioned t can be equal to 4 , n is equal to 4 plus the number of regions in Figure 4.

As an optional implementation manner, step 209 may include:

Using the third group of data as a selection address of a multiple-choice logic circuit, selecting the second mapping corresponding to the third group of data from the reference mapping symbols preset in each area of the second constellation diagram symbol.

In this way, step 209 can be to search for a mapping symbol among 2 ^nt mapping symbols, that is, the depth of the table lookup is 2 ^{n −t} .

210. Using the fourth set of data as a table look-up address, find a corrected offset vector corresponding to the fourth set of data from the area of the second constellation where the second mapping symbol is located, and the corrected The offset vector contains the I branch signal and the Q branch signal.

In this way, step 210 can be to search for a mapping symbol among 2 ^t mapping symbols, that is, the depth of the table lookup is 2 ^t . For example: the mapping symbol found in step 209 is the mapping title circled in Figure 4, then step 210 searches in the area where the mapping symbol is located, finds a mapping symbol from the area, and searches the mapping sign as a correction offset vector.

As an optional implementation manner, after step 208 and before step 210, the method further includes:

Gray encoding the fourth set of data;

Optionally, in this embodiment, step 210 may include:

The result of the gray encoding is used as a table lookup address, and the correction offset vector corresponding to the result is found from the area where the second mapping symbol is located in the second constellation diagram, and the correction offset vector includes 1 Branch signal and Q branch signal.

211. Add the second mapping symbol to the modified offset vector to obtain a third mapping symbol;

212. Perform quadrature amplitude modulation (QAM) on the third mapped symbol to obtain a second 2 ⁿ QAM modulated signal;

213. Send the second 2 ⁿ QAM modulated signal to a receiving end, so that the receiving end obtains the data to be modulated through data demodulation.

When the number of bits of the data to be modulated is an odd number, that is, the above-mentioned n is an odd number, in the modulation mapping process, only a 2 ^nt depth table lookup is required for the second constellation diagram, compared with a 2 ^t depth table lookup. 2 ⁿ in the prior art, the present invention can reduce the depth of the table lookup to save RAM resources.

As an optional implementation manner, the equipment for implementing this example may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, it can be realized that when the number of bits of the data to be modulated is even or odd, different mapping methods can be used, and the depth of the table lookup of the modulation mapping can be reduced, and the depth of the table lookup can be reduced in the demapping process. To save RAM resources.

Fig. 5 is a schematic flowchart of a demapping method provided by an embodiment of the present invention, as shown in Fig. 5 , including:

301. The receiving and transmitting end sends 2 ⁿ QAM modulated signals.

302. Demodulate the 2 ⁿ QAM modulated signals to obtain mapped symbols.

303. When the n is an even number, use the first vector of the I-branch signal contained in the mapping symbol as a look-up address, and find out the I-branch signal from the preset third constellation diagram containing bit data The first set of data corresponding to the channel signal.

304. Using the first vector of the Q-branch signal included in the mapping symbol as a table look-up address, look up the second group of data corresponding to the Q-branch signal from the third constellation diagram.

305. Splice the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

It should be noted that, the third constellation diagram provided in this embodiment is in one-to-one correspondence with the first constellation diagram provided in the above embodiment, the constellation diagram in the first constellation diagram represents the mapping symbol, and the constellation diagram used in the first constellation diagram The table lookup address is data (for example: bit data), and what is found out from the first constellation diagram using the table lookup address is a mapping symbol, while the constellation points in the third constellation diagram represent data, and the third constellation diagram uses The table lookup address is a mapping symbol, and what is found out from the first constellation diagram by using the table lookup address is a piece of data (for example: bit data). The structure of the third constellation diagram may refer to the structure of the first constellation diagram (for example, as shown in FIG. 3 ).

Optionally, assuming that the first set of data is t bits, the second set of data is n-t bits, and the original data is n bits, steps 303 and 304 demap the first set of data and the second set of data respectively, and Compared with demapping n-bit data at one time in the prior art, the depth of table lookup is reduced.

As an optional implementation manner, the equipment for implementing this example may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, the receiving and transmitting end sends 2 ⁿ QAM modulated signals, demodulates the 2 ⁿ QAM modulated signals, and obtains a mapping symbol; when the n is an even number, the I branch signal contained in the mapping symbol The first vector of the first vector is used as the address of the look-up table, and the first group of data corresponding to the I branch signal is found from the preset third constellation diagram containing bit data; the Q branch signal contained in the mapping symbol is The first vector is used as a table lookup address, and the second group of data corresponding to the Q branch signal is found from the third constellation diagram; the first group of data and the second group of data are spliced to obtain Raw data corresponding to the 2 ⁿ QAM modulated signals. In this way, the depth of the table lookup in the demapping process can be reduced, so as to save RAM resources.

Fig. 6 is a schematic flowchart of a demapping method provided by an embodiment of the present invention, as shown in Fig. 6 , including:

401. The receiving and transmitting end sends 2 ⁿ QAM modulated signals.

402. Demodulate the 2 ⁿ QAM modulated signals to obtain mapped symbols.

403. When the n is an even number, use the first vector of the I-branch signal included in the mapping symbol as a table lookup address, and find out the I-branch signal from the preset third constellation diagram containing bit data The first set of data corresponding to the channel signal;

404. Use the first vector of the Q-branch signal included in the mapping symbol as a table look-up address, and find a second group of data corresponding to the Q-branch signal from the third constellation diagram.

Optionally, when the data corresponding to the I branch signal is specifically the coordinate value of the abscissa in the third constellation diagram, then the data corresponding to the Q branch signal is the coordinate value of the ordinate in the third constellation diagram. Coordinate value; when the data corresponding to the I branch signal is specifically the coordinate value of the middle ordinate in the constellation diagram, then the data corresponding to the Q branch signal is the coordinate value of the abscissa in the constellation diagram.

405. Splice the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

Optionally, due to the orthogonality of the I and Q branch signals of the mapping symbol, step 405 may be to perform alternate insertion and splicing of the first group of data and the second group of data, that is, when the first group of data is ACE, the second group of data When the group data is BDF, in step 405, a data of ABCDEF is obtained.

406. When n is an odd number, gray code the lower t/2 bits of the I branch signal and the Q branch signal of the first mapped symbol to obtain coded bit data;

Optionally, there is a differential operation relationship between the lower t/2 bits of the above-mentioned mapping symbol and the coded bit data, so that through step 406, the bits corresponding to the lower two bits of the I branch signal and the Q branch signal of the mapping symbol can be The data is restored. If the coded bit data is four-bit data, step 406 performs Gray coding on the lower two bits of the mapping name to obtain the coded bit data.

407. Translate the preset fourth constellation diagram containing bit data by using the origin mapping symbol of the area of the fourth constellation diagram to shift the translation trajectory of the preset reference mapping symbol in the area; wherein, the fourth The constellation diagram includes 2 ^nt areas, each of which includes 2 ^t mapping symbols, t is a natural number, and t<n;

Optionally, the foregoing fourth constellation diagram corresponds to the second constellation diagram provided in the above embodiment, and for a corresponding relationship between the two, refer to the correspondence relationship between the third constellation diagram and the first constellation diagram described above.

Optionally, the above-mentioned translation track using the origin mapping symbol of the area of the fourth constellation map to the translation track of the area reference mapping name, this area can be any area in the fourth constellation map, because the area is in the fourth The position in the constellation diagram is fixed, and the position of the reference mapping symbol of each region is also fixed, so no matter which region the origin mapping symbol is translated to the translation track of the reference mapping name of the region is the same. For example: the structure of the fourth constellation diagram is as shown in Figure 4, and the mapping title circled in Figure 4 is the reference mapping symbol of a certain area, so step 407 just shifts the track of the reference mapping symbol with the origin mapping symbol of this area panning. The above origin mapping notation is the mapping notation of the center point of each region.

408. Perform the division operation of dividing the I branch signal and the Q branch signal of the mapping symbol into an integer by division t, multiply the I branch signal of the result of the division operation by N, and multiply the The result of the multiplication operation and the result of the Q branch signal of the division operation are used as a table lookup address, and the coset bit data is found from the shifted fourth constellation diagram; wherein, the N is the fourth constellation The number of bit data in the row containing the most bit data in the graph.

Optionally, the table lookup address may specifically be I'×N+Q', where I' is the I branch signal after the division operation, and Q' is the Q branch signal after the division operation.

409. Splice the coded bit data and the coset bit data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

As an optional implementation, when the above n is acquired, the constellation diagram used by the demodulation device when modulating and mapping the above mapping symbols can be known according to the value of n, when the number of bits corresponding to the 2 ⁿ QAM modulation signal is an odd number , that is, when n is an odd number, the rules for dividing the original data (that is, the data to be modulated described in the above-mentioned embodiment) when the modulation device modulates and maps the above-mentioned mapping symbols can be known through the fourth constellation diagram, and the fourth constellation diagram corresponds to When the second constellation diagram is the constellation diagram shown in Figure 4, the demodulation device can know that the modulation device divides the bit data of the LSB of the original data into coded bit data, and divides the bit data of the previous MSB into coset bits For example, DEFG in ABCDEFG is divided into coded bit data, and ABC is divided into coset bit data, so that step 309 can splice the coded bit data behind the coset bit data to obtain the original data of ABCDEFG.

As an optional implementation manner, the equipment for implementing this example may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, when the number of data bits corresponding to the mapping symbol is even or odd, different demapping methods can be used, and the depth of table lookup in the demapping process can be reduced to save RAM resources.

The following are the device embodiments of the present invention. The device embodiments of the present invention are used to execute the methods realized by the method embodiments 1 to 4 of the present invention. For the convenience of description, only the parts related to the embodiments of the present invention are shown, and the specific technical details are not disclosed. , please refer to Embodiment 1, Embodiment 2, Embodiment 3 and Embodiment 4 of the present invention.

FIG. 7 is a schematic structural diagram of a modulation device provided by an embodiment of the present invention. As shown in FIG. 7, it includes: an acquisition unit 501, a first division unit 502, a first table look-up unit 503, a second table look-up unit 504, and a combination unit 505. The first modulation unit 506 and the first sending unit 507, wherein:

An acquisition unit 501, configured to acquire data to be modulated, where the data to be modulated includes n modulation bits;

The first division unit 502 is configured to equally divide the data to be modulated into a first group of data and a second group of data according to a preset first division rule when n is an even number;

The first table look-up unit 503 is configured to use the first set of data as a table look-up address, and find the I-branch signal corresponding to the first set of data from the preset first constellation diagram containing mapping symbols The first vector value of ;

The second table lookup unit 504 is configured to use the second group of data as a table lookup address, and find out from the first constellation diagram the second vector value corresponding to the second group of data that includes the Q branch signal ;

A combining unit 505, configured to combine the first vector value and the second vector value to obtain a first mapping symbol;

The first modulation unit 506 is configured to perform quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

The first sending unit 507 is configured to send the first 2 ⁿ QAM modulated signal to the receiving end, so that the receiving end can obtain the data to be modulated through data demodulation.

When the receiving end receives the 2 ⁿ QAM modulated signal, it can demodulate the data to be modulated.

Optionally, assuming that the data to be modulated is 6 bits, step 101 may divide 3 bits of the data to be modulated into the first group of data, and divide the other 3 bits of data into the second group of data. In this way, the table look-up depth of the first table look-up unit 53 is 2 ³ , and the table look-up depth of the second table look-up unit 54 is 2 ³ . Compared with the table lookup depth of 2 ⁶ in the prior art, the table lookup depth is reduced.

As an optional implementation manner, the modulation device may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, when the number of bits of the data to be modulated is an even number, the data that needs to be modulated and mapped is equally divided into the first group of data and the second group of data, and the first group of data is used as the table lookup address, from the preset Find out the first vector value containing the I branch signal corresponding to the first group of data in the first constellation diagram containing the mapping symbol, use the second group of data as the look-up table address, from the first Find out the second vector value containing the Q branch signal corresponding to the second group of data in the constellation diagram; combine the first vector value with the second vector value to obtain the first mapping symbol; performing quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal; sending the 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation. In this way, the depth of the table lookup in the process of modulation mapping and demapping can be reduced, so as to save RAM resources.

FIG. 8 is a schematic structural diagram of another modulation device provided by an embodiment of the present invention. As shown in FIG. Merging unit 605, first modulation unit 606, first sending unit 607, second division unit 608, third table lookup unit 609, fourth table lookup unit 610, addition unit 611, second modulation unit 612 and second sending unit 613, of which:

An acquisition unit 601, configured to acquire data to be modulated, where the data to be modulated includes n modulation bits;

The first division unit 602 is configured to equally divide the data to be modulated into a first group of data and a second group of data according to a preset first division rule when n is an even number.

As an optional implementation manner, the foregoing first division rule may be preset based on the orthogonality characteristics of the I and Q branch signals in the mapping symbols included in the first constellation diagram. For example: such as the constellation diagram shown in Figure 2 for the above-mentioned first constellation diagram, the data to be modulated includes six bits of data ABCDEF, so that the above-mentioned first division rule can divide the bit data of the above-mentioned data such as ACE into the first Group data, dividing the bit data BDF at equal intervals into the second group data.

The first table look-up unit 603 is configured to use the first set of data as a table look-up address, and find out the I-branch signal corresponding to the first set of data from the preset first constellation diagram containing mapping symbols The first vector value of .

Optionally, the preset first constellation diagram containing mapping symbols may specifically be a constellation diagram as shown in FIG. The inner square is completely symmetrical.

As an optional implementation, the first table look-up unit 603 can also be used to use the first group of data as the selection address of a multiple-choice logic circuit, from the 2 ^n/2 contained in the first constellation diagram Select an I-branch signal corresponding to the first set of data from the I-branch signals, and use the selected I-branch signal as the first vector value.

Optionally, assuming that the number of bits of the data to be modulated is n, where n is an even number, the depth of the table lookup of the first table lookup unit 603 is ^2n/2 , specifically selecting from ^2n/2 I branch signals An I branch signal. The I branch signal may specifically be the coordinate value of the abscissa or the coordinate value of the ordinate in the constellation diagram.

The second table lookup unit 604 is configured to use the second group of data as a table lookup address, and find out from the first constellation diagram the second vector value corresponding to the second group of data that includes the Q branch signal .

As an optional implementation, the second table look-up unit 604 can also be used to use the second set of data as a selection address of a multiple-choice logic circuit, from the 2 ^n/2 contained in the first constellation diagram Select a Q branch signal corresponding to the first set of data from the Q branch signals, and use the selected Q branch signal as the second vector value.

Optionally, assuming that the number of bits of the data to be modulated is n, where n is an even number, the depth of the second table look-up unit 604 is 2 ^n/2 , specifically selecting from 2 ^n/2 Q branch signals A Q branch signal. Wherein, when the I branch signal is specifically the coordinate value of the abscissa in the constellation diagram, then the Q branch signal is the coordinate value of the ordinate in the constellation diagram; when the I branch signal is specifically The coordinate value of the ordinate in the constellation diagram, then the Q branch signal is the coordinate value of the abscissa in the constellation diagram.

A combining unit 605, configured to combine the first vector value and the second vector value to obtain a first mapping symbol;

The first modulation unit 606 is configured to perform quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

The first sending unit 607 is configured to send the first 2 ⁿ QAM modulated signal to the receiving end, so that the receiving end can obtain the data to be modulated through data demodulation.

When the receiving end receives the above 2 ⁿ QAM modulation signal, it can know whether the number of bits of the data corresponding to the 2 ⁿ QAM modulation signal is even or odd. When the mapping is an odd number, the demodulation method corresponding to the odd number of bit data is used for demapping.

The second division unit 608 is configured to divide the data to be modulated into a third group of data and a fourth group of data according to a preset second division rule when n is an odd number, wherein the third group of data includes n-t A coset of bits, the fourth group of data includes coded bits of t bits, where t is an integer greater than zero, and t<n.

As an optional implementation manner, the above-mentioned second division rule may be preset based on the second constellation diagram provided by the embodiment of the present invention, and may be set according to the reference mapping symbols of each area in the second constellation diagram, that is, The reference mapping symbols of each region in the second constellation diagram are different from the set second division rules, wherein the reference mapping symbols of each region in the second constellation diagram have the same common position in each region, and There is only one reference map symbol in each area. For example: the second constellation diagram is shown in Figure 4, and the reference mapping symbol of each region is the mapping title in the lower left corner of each region, for example: the mapping symbol circled in Figure 4, so that the second division rule can be The LSB and MSB of the bit data to be modulated are divided, that is, the bit data of the LSB of the data to be modulated can be the fourth group of data, that is, the coded bit data, and the bit data of the MSB of the data to be modulated can be the third group of data, which is Coset bit data, use coset bit data as table look-up address like this, just can find out in the second constellation diagram in each area in the second constellation diagram and select a mapping symbol in the reference mapping symbol (for example, select Figure 4 with circle circled mapping symbol), and use the coded bit data as the look-up table address to select a non-reference mapping symbol in the area where the above selected mapping symbol is located.

The third table look-up unit 609 is configured to use the third group of data as a table look-up address, and find out the second mapping symbol corresponding to the third group of data from the second constellation diagram including the mapping symbol set earlier; Wherein, the second constellation diagram includes 2 ^nt regions, each of which includes 2 ^t mapped symbols.

As an optional implementation, the above-mentioned n and t can be different according to the constellation diagram, as shown in the constellation diagram in Figure 4, each area in Figure 4 contains 16 constellation points, then the above-mentioned t can be equal to 4 , n is equal to 4 plus the number of regions in Figure 4.

As an optional implementation manner, the third table look-up unit 609 can also be used to use the third group of data as a selection address of a logic circuit for choosing one of many, and preset it from each area in the second constellation diagram Selecting a second mapping symbol corresponding to the third group of data from the reference mapping symbols of .

In this way, the third table lookup unit 609 can look up one mapping symbol among 2 ^nt mapping symbols, that is, the depth of the table lookup is 2 ^nt .

The fourth table look-up unit 610 is configured to use the fourth set of data as a table look-up address, and find the correction corresponding to the fourth set of data from the area of the second constellation diagram where the second mapping symbol is located. An offset vector, the modified offset vector includes the I branch signal and the Q branch signal.

In this way, the fourth table lookup unit 610 can look up one mapping symbol among 2 ^t mapping symbols, that is, the depth of the table lookup is 2 ^t . For example: the mapping symbol that the 3rd look-up table unit 609 finds out is the mapping title circled in Fig. 4, so the 4th look-up table unit 610 just searches in the area where this mapping symbol is located, finds out a from this area Mapping symbol, use the found mapping symbol as the correction offset vector.

As an optional implementation manner, the device may also include:

a coding unit, configured to gray code the fourth set of data;

Optionally, in this embodiment, the fourth table look-up unit 610 can also be used to use the result of Gray encoding as a table look-up address to find out from the area of the second constellation where the second mapping symbol is located. A modified offset vector corresponding to the result, the modified offset vector includes the I branch signal and the Q branch signal.

An adding unit 611, configured to add the second mapping symbol to the modified offset vector to obtain a third mapping symbol;

The second modulation unit 612 is configured to perform quadrature amplitude modulation (QAM) on the third mapped symbol to obtain a second 2 ⁿ QAM modulated signal;

The second sending unit 613 is configured to send the second 2 ⁿ QAM modulated signal to the receiving end, so that the receiving end obtains the data to be modulated through data demodulation.

When the number of bits of the data to be modulated is an odd number, that is, the above-mentioned n is an odd number, in the modulation mapping process, only a 2 ^nt depth table lookup is required for the second constellation diagram, compared with a 2 ^t depth table lookup. 2 ⁿ in the prior art, the present invention can reduce the depth of the table lookup to save RAM resources.

As an optional implementation manner, the modulation device may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, it can be realized that when the number of bits of the data to be modulated is even or odd, different mapping methods can be used, and the depth of the table lookup of the modulation mapping can be reduced, and the depth of the table lookup can be reduced in the demapping process. To save RAM resources.

Fig. 9 is a schematic structural diagram of a demodulation device provided by an embodiment of the present invention. As shown in Fig. 9, it includes: a receiving unit 701, a demodulation unit 702, a first table look-up unit 703, a second table look-up unit 704, and a second table look-up unit 704. A splicing unit 705, wherein:

The receiving unit 701 is used to receive the 2 ⁿ QAM modulated signal sent by the transmitting end;

A demodulation unit 702, configured to demodulate the 2 ⁿ QAM modulated signals to obtain mapped symbols;

The first table look-up unit 703 is configured to use the first vector of the I-branch signal included in the mapping symbol as a table look-up address when the n is an even number, from the preset third constellation diagram containing bit data Find out the first set of data corresponding to the I branch signal;

The second table lookup unit 704 is configured to use the second vector of the Q branch signal contained in the mapping symbol as a table lookup address, and find the second vector corresponding to the Q branch signal from the third constellation diagram. group data;

The first splicing unit 705 is configured to splice the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

It should be noted that, the third constellation diagram provided in this embodiment is in one-to-one correspondence with the first constellation diagram provided in the above embodiment, the constellation diagram in the first constellation diagram represents the mapping symbol, and the constellation diagram used in the first constellation diagram The table lookup address is data (for example: bit data), and what is found out from the first constellation diagram using the table lookup address is a mapping symbol, while the constellation points in the third constellation diagram represent data, and the third constellation diagram uses The table lookup address is a mapping symbol, and what is found out from the first constellation diagram by using the table lookup address is a piece of data (for example: bit data). The structure of the third constellation diagram may refer to the structure of the first constellation diagram (for example, as shown in FIG. 3 ).

Optionally, assume that the first set of data is t bits, the second set of data is n-t bits, and the original data is n bits, so that the first table lookup unit 703 and the second table lookup unit 704 demap the first table lookup unit 704 respectively. The first set of data and the second set of data reduce the depth of table lookup compared with the prior art that demaps n-bit data at a time.

As an optional implementation manner, the demodulation device may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, the receiving and transmitting end sends 2 ⁿ QAM modulated signals, demodulates the 2 ⁿ QAM modulated signals, and obtains a mapping symbol; when the n is an even number, the I branch signal contained in the mapping symbol The first vector of the first vector is used as the address of the look-up table, and the first group of data corresponding to the I branch signal is found from the preset third constellation diagram containing bit data; the Q branch signal contained in the mapping symbol is The first vector is used as a table lookup address, and the second group of data corresponding to the Q branch signal is found from the third constellation diagram; the first group of data and the second group of data are spliced to obtain Raw data corresponding to the 2 ⁿ QAM modulated signals. In this way, the depth of the table lookup in the demapping process can be reduced, so as to save RAM resources.

FIG. 10 is a schematic structural diagram of another demodulation device provided by an embodiment of the present invention. As shown in FIG. The first splicing unit 805, the encoding unit 806, the translation unit 807, the third table look-up unit 808 and the second splicing unit 809, wherein:

A receiving unit 801, configured to receive a 2 ⁿ QAM modulated signal sent by the transmitting end;

A demodulation unit 802, configured to demodulate the 2 ⁿ QAM modulated signals to obtain mapped symbols;

The first table look-up unit 803 is configured to use the first vector of the I-branch signal included in the mapping symbol as a table look-up address when the n is an even number, from the preset third constellation diagram containing bit data Find out the first set of data corresponding to the I branch signal;

The second table lookup unit 804 is configured to use the second vector of the Q branch signal included in the mapping symbol as a table lookup address, and find the second vector corresponding to the Q branch signal from the third constellation diagram. group data;

Optionally, when the data corresponding to the I branch signal is specifically the coordinate value of the abscissa in the third constellation diagram, then the data corresponding to the Q branch signal is the coordinate value of the ordinate in the third constellation diagram. Coordinate value; when the data corresponding to the I branch signal is specifically the coordinate value of the middle ordinate in the constellation diagram, then the data corresponding to the Q branch signal is the coordinate value of the abscissa in the constellation diagram.

The first splicing unit 805 is configured to splice the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

Optionally, due to the orthogonality of the I and Q branch signals of the mapped symbols, the first splicing unit 805 may insert and splice the first set of data and the second set of data in turn, that is, when the first set of data is an ACE , when the second group of data is BDF, the first splicing unit 805 obtains data of ABCDEF.

The coding unit 806 is configured to gray code the lower t/2 bits of the I branch signal and the Q branch signal of the mapping symbol to obtain coded bit data when n is an odd number.

Optionally, there is a differential operation relationship between the lower t/2 bits of the above-mentioned mapping symbol and the coded bit data, so that the encoding unit 806 can convert the corresponding two lower bits of the I branch signal and the Q branch signal of the mapping symbol The bit data is restored. If the coded bit data is four-bit data, the encoding unit 806 gray-encodes the lower two bits of the mapping name to obtain the coded bit data.

The translation unit 807 is configured to translate the preset fourth constellation diagram containing bit data from the origin mapping symbol of the area of the fourth constellation diagram to the translation trajectory of the preset reference mapping symbol in the area for translation; wherein, The fourth constellation diagram includes 2 ^nt areas, each of which includes 2 ^t mapping symbols, t is a natural number, and t<n.

Optionally, the foregoing fourth constellation diagram corresponds to the second constellation diagram provided in the above embodiment, and for a corresponding relationship between the two, refer to the correspondence relationship between the third constellation diagram and the first constellation diagram described above.

Optionally, the above-mentioned translation track using the origin mapping symbol of the area of the fourth constellation map to the translation track of the area reference mapping name, this area can be any area in the fourth constellation map, because the area is in the fourth The position in the constellation diagram is fixed, and the position of the reference mapping symbol of each region is also fixed, so no matter which region the origin mapping symbol is translated to the translation track of the reference mapping name of the region is the same. For example: the structure of the fourth constellation diagram is shown in Figure 4, and the mapping title circled in Figure 4 is the reference mapping symbol of a certain area, so the translation unit 807 will shift the origin mapping symbol of the area to the reference mapping symbol Trajectory translation. The above origin mapping notation is the mapping notation of the center point of each region.

The third table look-up unit 808 is used to divide the I-branch signal and the Q-branch signal of the mapping symbol into a division operation divided by t and round to an integer, and multiply the I-branch signal of the result of the division operation by N A multiplication operation, using the result of the multiplication operation and the result of the Q branch signal of the division operation as a table lookup address, and finding the coset bit data from the shifted fourth constellation diagram; wherein, the N is the number of bit data in a row containing the most bit data in the fourth constellation diagram.

Optionally, the table lookup address may specifically be I'×N+Q', where I' is the I branch signal after the division operation, and Q' is the Q branch signal after the division operation.

The second splicing unit 809 is configured to splice the coded bit data and the coset bit data to obtain original data corresponding to the 2 ⁿ QAM modulated signal.

As an optional implementation, when the above n is acquired, the constellation diagram used by the demodulation device when modulating and mapping the above mapping symbols can be known according to the value of n, when the number of bits corresponding to the 2 ⁿ QAM modulation signal is an odd number , that is, when n is an odd number, the rules for dividing the original data (that is, the data to be modulated described in the above-mentioned embodiment) when the modulation device modulates and maps the above-mentioned mapping symbols can be known through the fourth constellation diagram, and the fourth constellation diagram corresponds to When the second constellation diagram is the constellation diagram shown in Figure 4, the demodulation device can know that the modulation device divides the bit data of the LSB of the original data into coded bit data, and divides the bit data of the previous MSB into coset bits Data, such as DEFG in ABCDEFG is divided into coded bit data, and ABC is divided into coset bit data, so that the second splicing unit 809 can splice the coded bit data behind the coset bit data to obtain the original data of ABCDEFG .

As an optional implementation manner, the demodulation device may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, when the number of data bits corresponding to the mapping symbol is even or odd, different demapping methods can be used, and the depth of table lookup in the demapping process can be reduced to save RAM resources.

FIG. 11 is a schematic structural diagram of a modulation mapping system provided by an embodiment of the present invention. As shown in FIG. 11 , it includes: a modulation device 901 and a demodulation device 902 .

Optionally, the modulation device 901 may be a modulation device in any implementation manner in the embodiments shown in FIG. 7 or FIG. 8 .

For example, the modulation device 901 may include: an acquisition unit, a first division unit, a first table lookup unit, a second table lookup unit, a combination unit, a first modulation unit, and a first sending unit, wherein:

The acquiring unit is configured to acquire data to be modulated, the data to be modulated includes n modulation bits;

The first division unit is configured to equally divide the data to be modulated into a first group of data and a second group of data according to a preset first division rule when n is an even number;

The first table look-up unit is configured to use the first set of data as a table look-up address, and find the I branch corresponding to the first set of data from the preset first constellation diagram containing mapping symbols the first vector value of the signal;

The second table lookup unit is configured to use the second group of data as a table lookup address, and find out from the first constellation diagram a second vector corresponding to the second group of data containing the Q branch signal value;

The merging unit is configured to combine the first vector value and the second vector value to obtain a first mapping symbol;

The first modulation unit is configured to perform quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

The first sending unit is configured to send the first 2 ⁿ QAM modulated signal to a receiving end, so that the receiving end obtains the data to be modulated through data demodulation.

As an optional implementation manner, the modulation device may specifically be any device that applies the modulation mapping method provided in the embodiment of the present invention, such as a mobile phone, a computer, and other devices.

Optionally, the demodulation device 902 may be the demodulation device provided in any implementation manner in the embodiments shown in FIG. 9 or FIG. 10 .

For example, the demodulation device 902 may include: a receiving unit, a demodulation unit, a first table lookup unit, a second table lookup unit, and a first splicing unit, wherein:

The receiving unit is used to receive 2 ⁿ QAM modulation signals sent by the transmitting end;

The demodulation unit is configured to demodulate the 2 ⁿ QAM modulated signals to obtain mapped symbols;

The first table look-up unit is configured to use the first vector of the I-branch signal included in the mapping symbol as a table look-up address when the n is an even number, from the preset third constellation diagram containing bit data Find out the first set of data corresponding to the I branch signal;

The second table lookup unit is configured to use the second vector of the Q branch signal included in the mapping symbol as a table lookup address, and find out the first vector corresponding to the Q branch signal from the third constellation diagram. Two sets of data;

The first splicing unit is configured to splice the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

As an optional implementation manner, the demodulation device may specifically be any device that applies the modulation mapping method provided in the embodiment of the present invention, such as a mobile phone, a computer, and other devices.

In the above technical solution, when the number of bits of the data to be modulated is an even number, the data that needs to be modulated and mapped is equally divided into the first group of data and the second group of data, and the first group of data is used as the table lookup address, from the preset Find out the first vector value containing the I branch signal corresponding to the first group of data in the first constellation diagram containing the mapping symbol, use the second group of data as the look-up table address, from the first Find out the second vector value containing the Q branch signal corresponding to the second group of data in the constellation diagram; combine the first vector value with the second vector value to obtain the first mapping symbol; performing quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal; sending the 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation. In this way, the depth of the table lookup in the process of modulation mapping and demapping can be reduced, so as to save RAM resources.

Fig. 12 is a schematic structural diagram of another modulation device provided by an embodiment of the present invention. As shown in Fig. 12, it includes: a receiver 101, a processor 102, and a transmitter 103, wherein:

Processor 102, configured to perform the following steps:

Obtaining data to be modulated, where the data to be modulated includes n modulation bits;

When n is an even number, equally dividing the data to be modulated into a first group of data and a second group of data according to a preset first division rule;

Using the first set of data as a look-up table address, look up the first vector value containing the I branch signal corresponding to the first set of data from a preset first constellation diagram containing mapping symbols;

Using the second set of data as a look-up table address, find a second vector value corresponding to the second set of data that includes the Q branch signal from the first constellation diagram;

combining the first vector value with the second vector value to obtain a first mapped symbol;

performing quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

The transmitter 103 is configured to send the 2 ⁿ QAM modulated signal to the receiving end so that the receiving end obtains the data to be modulated through data demodulation.

As an optional implementation, when the data to be modulated is sent by other devices to the demodulation device provided in this implementation, the receiver 101 is used to obtain the data to be modulated sent by other devices, and the data to be modulated includes n modulation bits.

When the receiving end receives the 2 ⁿ QAM modulated signal, it can demodulate the data to be modulated.

Optionally, assuming that the data to be modulated is 6 bits, step 101 may divide 3 bits of the data to be modulated into the first group of data, and divide the other 3 bits of data into the second group of data. In this way, the processor 102 performs two table lookups with a depth of ²³ . Compared with the table lookup depth of 2 ⁶ in the prior art, the table lookup depth is reduced.

As an optional implementation manner, the modulation device may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, when the number of bits of the data to be modulated is an even number, the data that needs to be modulated and mapped is equally divided into the first group of data and the second group of data, and the first group of data is used as the table lookup address, from the preset Find out the first vector value containing the I branch signal corresponding to the first group of data in the first constellation diagram containing the mapping symbol, use the second group of data as the look-up table address, from the first Find out the second vector value containing the Q branch signal corresponding to the second group of data in the constellation diagram; combine the first vector value with the second vector value to obtain the first mapping symbol; performing quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal; sending the 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation. In this way, the depth of the table lookup in the process of modulation mapping and demapping can be reduced, so as to save RAM resources.

Fig. 13 is a schematic structural diagram of another modulation device provided by an embodiment of the present invention, as shown in Fig. 13 , including: a receiver 111, a processor 112, and a transmitter 113, wherein:

Processor 112, configured to perform the following steps:

Obtaining data to be modulated, where the data to be modulated includes n modulation bits;

When n is an even number, equally dividing the data to be modulated into a first group of data and a second group of data according to a preset first division rule;

Using the first set of data as a look-up table address, look up the first vector value containing the I branch signal corresponding to the first set of data from a preset first constellation diagram containing mapping symbols;

Using the second set of data as a look-up table address, find a second vector value corresponding to the second set of data that includes the Q branch signal from the first constellation diagram;

combining the first vector value with the second vector value to obtain a first mapped symbol;

Combining the first vector value with the second vector value to obtain a first mapped symbol.

The transmitter 113 is configured to send the first 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation.

The processor 112 is also configured to perform the following steps:

When n is an odd number, divide the data to be modulated into a third group of data and a fourth group of data according to a preset second division rule, wherein the third group of data includes coset bits of n-t bits, the The fourth group of data includes coded bits of t bits, where t is an integer greater than zero, and t<n;

Using the third group of data as a table look-up address, find out the second mapping symbol corresponding to the third group of data from the second constellation diagram that contains the mapping symbol set earlier; wherein, the second constellation diagram includes 2 ^nt regions, each of which contains 2 ^t mapping symbols;

Using the fourth set of data as a look-up table address, find a corrected offset vector corresponding to the fourth set of data from the area where the second mapping symbol is located in the second constellation diagram, and the corrected offset The vector contains the I branch signal and the Q branch signal;

adding the second mapping symbol to the modified offset vector to obtain a third mapping symbol;

Perform quadrature amplitude modulation (QAM) on the third mapped symbols to obtain second 2 ⁿ QAM modulated signals.

The transmitter 113 is further configured to send the second 2 ⁿ QAM modulated signal to the receiving end, so that the receiving end obtains the data to be modulated through data demodulation.

As an optional implementation, when the data to be modulated is sent to the demodulation device provided by other devices, the receiver 111 is used to obtain the data to be modulated sent by other devices, and the data to be modulated includes n modulation bits.

As an optional implementation manner, the foregoing first division rule may be preset based on the orthogonality characteristics of the I and Q branch signals in the mapping symbols included in the first constellation diagram. For example: such as the constellation diagram shown in Figure 2 for the above-mentioned first constellation diagram, the data to be modulated includes six bits of data ABCDEF, so that the above-mentioned first division rule can divide the bit data of the above-mentioned data such as ACE into the first Group data, dividing the bit data BDF at equal intervals into the second group data.

Optionally, the preset first constellation diagram containing mapping symbols may specifically be a constellation diagram as shown in FIG. The inner square is completely symmetrical.

As an optional implementation manner, the processor 112 executes using the first group of data as a table lookup address, and finds the first constellation diagram corresponding to the first group of data from the preset first constellation diagram containing the mapping symbols. The step of the first vector value of the I branch signal may comprise:

Using the first group of data as a selection address of a multi-choice logic circuit, selecting an I branch corresponding to the first group of data from the ^2n/2 I branch signals contained in the first constellation diagram branch signal, and use the selected I branch signal as the first vector value.

Optionally, assuming that the number of bits of the data to be modulated is n, where n is an even number, the depth of the table lookup of the processor 112 is 2 ^n/2 , specifically selecting an I branch from 2 ^n/2 I branch signals road signal. The I branch signal may specifically be the coordinate value of the abscissa or the coordinate value of the ordinate in the constellation diagram.

As an optional implementation manner, the processor 112 uses the second set of data as a table lookup address to find out from the first constellation diagram corresponding to the second set of data and includes the Q branch signal. The step of the second vector value may include:

Using the second group of data as a selection address of a multi-select logic circuit, select a Q branch corresponding to the first group of data from the ^2n/2 Q branch signals contained in the first constellation diagram channel signal, and use the selected Q branch signal as the second vector value.

Optionally, assuming that the number of bits of the data to be modulated is n, where n is an even number, the depth of the table lookup by the processor 112 is 2 ^n/2 , specifically selecting a Q branch from 2 ^n/2 Q branch signals road signal. Wherein, when the I branch signal is specifically the coordinate value of the abscissa in the constellation diagram, then the Q branch signal is the coordinate value of the ordinate in the constellation diagram; when the I branch signal is specifically The coordinate value of the ordinate in the constellation diagram, then the Q branch signal is the coordinate value of the abscissa in the constellation diagram.

When the receiving end receives the above 2 ⁿ QAM modulation signal, it can know whether the number of bits of the data corresponding to the 2 ⁿ QAM modulation signal is even or odd. When the mapping is an odd number, the demodulation method corresponding to the odd number of bit data is used for demapping.

As an optional implementation manner, the above-mentioned second division rule may be preset based on the second constellation diagram provided by the embodiment of the present invention, and may be set according to the reference mapping symbols of each area in the second constellation diagram, that is, The reference mapping symbols of each region in the second constellation diagram are different from the set second division rules, wherein the reference mapping symbols of each region in the second constellation diagram have the same common position in each region, and There is only one reference map symbol in each area. For example: the second constellation diagram is shown in Figure 4, and the reference mapping symbol of each region is the mapping title in the lower left corner of each region, for example: the mapping symbol circled in Figure 4, so that the second division rule can be The LSB and MSB of the bit data to be modulated are divided, that is, the bit data of the LSB of the data to be modulated can be the fourth group of data, that is, the coded bit data, and the bit data of the MSB of the data to be modulated can be the third group of data, which is Coset bit data, use coset bit data as table look-up address like this, just can find out in the second constellation diagram in each area in the second constellation diagram and select a mapping symbol in the reference mapping symbol (for example, select Figure 4 with circle circled mapping symbol), and use the coded bit data as the look-up table address to select a non-reference mapping symbol in the area where the above selected mapping symbol is located.

As an optional implementation, the above-mentioned n and t can be different according to the constellation diagram, as shown in the constellation diagram in Figure 4, each area in Figure 4 contains 16 constellation points, then the above-mentioned t can be equal to 4 , n is equal to 4 plus the number of regions in Figure 4.

As an optional implementation manner, the processor 112 executes using the third group of data as a table lookup address, and finds the second constellation diagram corresponding to the third group of data from the previously set second constellation diagram containing mapping symbols. Two mapping symbols; wherein, the second constellation diagram contains 2 ^nt regions, and the step of each region containing 2 ^t mapping symbols may include:

Using the third group of data as a selection address of a multiple-choice logic circuit, selecting the second mapping corresponding to the third group of data from the reference mapping symbols preset in each area of the second constellation diagram symbol.

In this way, the processor 112 can search for one mapping symbol among 2 ^nt mapping symbols, that is, the depth of the table lookup is 2 ^nt .

In this way, the processor 112 can search for one mapping symbol among 2 ^t mapping symbols, that is, the depth of the table lookup is 2 ^t .

As an optional implementation manner, after the processor 112 divides the data to be modulated into the third group of data and the fourth group of data according to the preset second division rule, after performing the division of the fourth group of data into The data is used as a table look-up address, and the modified offset vector corresponding to the fourth set of data is found from the area of the second constellation diagram where the second mapping symbol is located, and the modified offset vector includes the I branch signal And before the steps of the Q branch signal, the processor 112 can also be used to perform the following steps:

Gray encoding the fourth group of data;

Optionally, in this embodiment, the processor 112 executes using the fourth group of data as a table look-up address, and finds out from the area of the second constellation diagram where the second mapping symbol is located. A modified offset vector corresponding to the data, the step of including the I branch signal and the Q branch signal may include:

The result of the gray encoding is used as a table lookup address, and the correction offset vector corresponding to the result is found from the area where the second mapping symbol is located in the second constellation diagram, and the correction offset vector includes 1 Branch signal and Q branch signal.

When the number of bits of the data to be modulated is an odd number, that is, the above-mentioned n is an odd number, in the modulation mapping process, only a 2 ^nt depth table lookup is required for the second constellation diagram, compared with a 2 ^t depth table lookup. 2 ⁿ in the prior art, the present invention can reduce the depth of the table lookup to save RAM resources.

As an optional implementation manner, the device may also include:

The memory 114 is used for storing programs executed by the processor 112 .

As an optional implementation manner, the modulation device may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, it can be realized that when the number of bits of the data to be modulated is even or odd, different mapping methods can be used, and the depth of the table lookup of the modulation mapping can be reduced, and the depth of the table lookup can be reduced in the demapping process. To save RAM resources.

FIG. 14 is a schematic structural diagram of another demodulation device provided by an embodiment of the present invention. As shown in FIG. 14 , it includes: a receiver 121 and a processor 122, wherein:

The receiver 121 is configured to receive 2 ⁿ QAM modulated signals sent by the transmitting end.

The processor 122 is used to perform the following steps:

Demodulating the 2 ⁿ QAM modulated signals to obtain mapped symbols;

When the n is an even number, use the first vector of the I-branch signal included in the mapping symbol as a look-up address, and find out the I-branch signal from the preset third constellation diagram containing bit data The corresponding first set of data;

Using the first vector of the Q branch signal contained in the mapping symbol as a table lookup address, finding the second group of data corresponding to the Q branch signal from the third constellation diagram;

Splicing the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

It should be noted that, the third constellation diagram provided in this embodiment is in one-to-one correspondence with the first constellation diagram provided in the above embodiment, the constellation diagram in the first constellation diagram represents the mapping symbol, and the constellation diagram used in the first constellation diagram The table lookup address is data (for example: bit data), and what is found out from the first constellation diagram using the table lookup address is a mapping symbol, while the constellation points in the third constellation diagram represent data, and the third constellation diagram uses The table lookup address is a mapping symbol, and what is found out from the first constellation diagram by using the table lookup address is a piece of data (for example: bit data). The structure of the third constellation diagram may refer to the structure of the first constellation diagram (for example, as shown in FIG. 3 ).

Optionally, it is assumed that the first set of data is t bits, the second set of data is n-t bits, and the original data is n bits, so that the processor 122 respectively demaps the first set of data and the second set of data, and the present The depth of the look-up table is reduced compared with the technology that unmaps n-bit data at a time.

As an optional implementation manner, the demodulation device may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, the receiving and transmitting end sends 2 ⁿ QAM modulated signals, demodulates the 2 ⁿ QAM modulated signals, and obtains a mapping symbol; when the n is an even number, the I branch signal contained in the mapping symbol The first vector of the first vector is used as the address of the look-up table, and the first group of data corresponding to the I branch signal is found from the preset third constellation diagram containing bit data; the Q branch signal contained in the mapping symbol is The first vector is used as a table lookup address, and the second group of data corresponding to the Q branch signal is found from the third constellation diagram; the first group of data and the second group of data are spliced to obtain Raw data corresponding to the 2 ⁿ QAM modulated signals. In this way, the depth of the table lookup in the demapping process can be reduced, so as to save RAM resources.

FIG. 15 is a schematic structural diagram of another demodulation device provided by an embodiment of the present invention. As shown in FIG. 15 , it includes: a receiver 131 and a processor 132, wherein:

The receiver 131 is configured to receive 2 ⁿ QAM modulated signals sent by the transmitting end.

The processor 132 is used to perform the following steps:

Demodulating the 2 ⁿ QAM modulated signals to obtain mapped symbols;

When the n is an even number, use the first vector of the I-branch signal included in the mapping symbol as a look-up address, and find out the I-branch signal from the preset third constellation diagram containing bit data The corresponding first set of data;

Using the first vector of the Q branch signal contained in the mapping symbol as a table lookup address, finding the second group of data corresponding to the Q branch signal from the third constellation diagram;

splicing the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal;

When n is an odd number, gray-encode the lower t/2 bits of the I branch signal and the Q branch signal of the first mapping symbol to obtain coded bit data;

The preset fourth constellation diagram containing bit data is shifted by shifting the origin mapping symbol of the region of the fourth constellation diagram to the translation track of the reference mapping symbol preset in the region; wherein, the fourth constellation diagram Contains 2 ^nt regions, each of which contains 2 ^t mapping symbols, t is a natural number, and t<n;

The I branch signal and the Q branch signal of the mapping symbol are respectively divided by t and rounded to an integer division operation, the I branch signal of the result of the division operation is multiplied by N, and the multiplication operation The result and the result of the Q branch signal of the division operation are used as a table lookup address, and the coset bit data is found from the shifted fourth constellation diagram; wherein, the N is the fourth constellation diagram The number of bit data of the row containing the most bit data;

Splicing the coded bit data and the coset bit data to obtain original data corresponding to the 2 ⁿ QAM modulated signal.

When n is an even number, optionally, the data corresponding to the I branch signal in the mapping symbol is specifically the coordinate value of the middle abscissa of the third constellation diagram, then the data corresponding to the Q branch signal is the third The coordinate value of the ordinate in the constellation diagram; when the data corresponding to the I branch signal is specifically the coordinate value of the middle ordinate in the constellation diagram, then the corresponding data of the Q branch signal is the abscissa in the constellation diagram coordinate value.

Optionally, due to the orthogonality of the I and Q branch signals of the mapping symbols, the processor 132 may insert and concatenate the first set of data and the second set of data in turn, that is, when the first set of data is ACE, the second set of data When the two sets of data are BDF, the processor 132 obtains data of ABCDEF.

When n is an odd number, optionally, there is a differential operation relationship between the lower t/2 bits of the above-mentioned mapping symbol and the coded bit data, so that the I branch signal and the Q branch signal of the mapping symbol can be combined by the processor 132 The bit data corresponding to the lower two bits are restored. If the coded bit data is four-bit data, the processor 132 performs gray coding on the lower two bits of the mapping name to obtain the coded bit data.

Optionally, the foregoing fourth constellation diagram corresponds to the second constellation diagram provided in the above embodiment, and for a corresponding relationship between the two, refer to the correspondence relationship between the third constellation diagram and the first constellation diagram described above.

Optionally, the above-mentioned translation track using the origin mapping symbol of the area of the fourth constellation map to the translation track of the area reference mapping name, this area can be any area in the fourth constellation map, because the area is in the fourth The position in the constellation diagram is fixed, and the position of the reference mapping symbol of each region is also fixed, so no matter which region the origin mapping symbol is translated to the translation track of the reference mapping name of the region is the same. For example: the structure of the fourth constellation diagram is as shown in Figure 4, and the mapping title circled in Figure 4 is the reference mapping symbol of a certain area, so the processor 132 will translate the reference mapping symbol by the origin mapping symbol of the area Trajectory translation. The above origin mapping notation is the mapping notation of the center point of each area.

Optionally, the table lookup address may specifically be I'×N+Q', where I' is the I branch signal after the division operation, and Q' is the Q branch signal after the division operation.

As an optional implementation, when the above n is acquired, the constellation diagram used by the demodulation device when modulating and mapping the above mapping symbols can be known according to the value of n, when the number of bits corresponding to the 2 ⁿ QAM modulation signal is an odd number , that is, when n is an odd number, the rules for dividing the original data (that is, the data to be modulated described in the above-mentioned embodiment) when the modulation device modulates and maps the above-mentioned mapping symbols can be known through the fourth constellation diagram, and the fourth constellation diagram corresponds to When the second constellation diagram is the constellation diagram shown in Figure 4, the demodulation device can know that the modulation device divides the bit data of the LSB of the original data into coded bit data, and divides the bit data of the previous MSB into coset bits For example, DEFG in ABCDEFG is divided into coded bit data, and ABC is divided into coset bit data, so that the processor 132 can splice the coded bit data behind the coset bit data to obtain the original data of ABCDEFG.

As an optional implementation manner, the device may also include:

The memory 133 is used for storing programs executed by the processor 132 .

As an optional implementation manner, the demodulation device may include:

Communication equipment such as mobile phones and computers.

In the above technical solution, when the number of data bits corresponding to the mapping symbol is even or odd, different demapping methods can be used, and the depth of table lookup in the demapping process can be reduced to save RAM resources.

FIG. 16 is a schematic structural diagram of another modulation mapping system provided by an embodiment of the present invention. As shown in FIG. 16 , it includes: a modulation device 141 and a demodulation device 142 .

Optionally, the modulation device 141 may be a modulation device in any implementation manner in the embodiments shown in FIG. 12 or FIG. 13 .

For example, the modulation device 91 may include: a receiver, a processor, and a transmitter, wherein:

A processor for performing the following steps:

Obtaining data to be modulated, where the data to be modulated includes n modulation bits;

When n is an even number, equally dividing the data to be modulated into a first group of data and a second group of data according to a preset first division rule;

Using the first set of data as a look-up table address, look up the first vector value containing the I branch signal corresponding to the first set of data from a preset first constellation diagram containing mapping symbols;

Using the second set of data as a look-up table address, find a second vector value corresponding to the second set of data that includes the Q branch signal from the first constellation diagram;

combining the first vector value with the second vector value to obtain a first mapped symbol;

performing quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal;

A transmitter, configured to send the 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation.

When the data to be modulated is sent by other devices to the demodulation device provided in this implementation, the receiver is configured to acquire the data to be modulated sent by the other device, where the data to be modulated includes n modulation bits.

Optionally, the demodulation device 142 may be a demodulation device in any implementation manner in the embodiments shown in FIG. 14 or FIG. 15 .

For example, the demodulation device 142 may include: a receiver and a processor, wherein:

The receiver is used for receiving 2 ⁿ QAM modulation signals sent by the transmitter.

The processor is used to perform the following steps:

Demodulating the 2 ⁿ QAM modulated signals to obtain mapped symbols;

When the n is an even number, use the first vector of the I-branch signal included in the mapping symbol as a look-up address, and find out the I-branch signal from the preset third constellation diagram containing bit data The corresponding first set of data;

Using the first vector of the Q branch signal contained in the mapping symbol as a table lookup address, finding the second group of data corresponding to the Q branch signal from the third constellation diagram;

Splicing the first set of data and the second set of data to obtain original data corresponding to the 2 ⁿ QAM modulation signal.

In the above technical solution, when the number of bits of the data to be modulated is an even number, the data that needs to be modulated and mapped is equally divided into the first group of data and the second group of data, and the first group of data is used as the table lookup address, from the preset Find the first vector value containing the I branch signal corresponding to the first group of data in the first constellation diagram containing the mapping symbols, and use the second group of data as a table look-up address, from the first Find out the second vector value containing the Q branch signal corresponding to the second group of data in the constellation diagram; combine the first vector value with the second vector value to obtain the first mapping symbol; performing quadrature amplitude modulation (QAM) on the first mapped symbol to obtain a first 2 ⁿ QAM modulated signal; sending the 2 ⁿ QAM modulated signal to a receiving end so that the receiving end obtains the data to be modulated through data demodulation. In this way, the depth of the table lookup in the process of modulation mapping and demapping can be reduced, so as to save RAM resources.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM for short).

The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (11)

1. a kind of method for modulating mapping, it is characterised in that including：

Data to be modulated are obtained, the data to be modulated include n modulation bit；

When n be even number when, according to the first division rule pre-set by the data to be modulated be divided into first group of data and Second group of data；

Using first group of data as address of tabling look-up, found out from the first planisphere of preset containment mapping symbol and institute State the corresponding primary vector value for including I tributary signals of first group of data；

Using second group of data as address of tabling look-up, found out from first planisphere corresponding with second group of data The secondary vector value for including Q tributary signals；

The primary vector value is merged with the secondary vector value, the first mapping symbols are obtained；

Quadrature amplitude modulation QAM is carried out to first mapping symbols, the 1st is obtainedⁿQam signal；

Send the described 1stⁿQam signal is to receiving terminal, so that the receiving terminal obtains described to be modulated by data demodulation Data；

Obtain after data to be modulated, methods described also includes：When n is odd number, dividing rule according to second pre-set will The data to be modulated are divided into the 3rd group of data and the 4th group of data, wherein, the 3rd group of data include the coset of n-t bits Bit, the 4th group of data include the coded-bit of t bits, and the t is the integer more than zero, and t<n；

Using the 3rd group of data as address of tabling look-up, found out from the second planisphere of the containment mapping symbol first set with Corresponding second mapping symbols of the 3rd group of data；Wherein, second planisphere includes 2^n-tIndividual region, each area Domain includes 2^tIndividual mapping symbols；

Using the 4th group of data as address of tabling look-up, in the region of second planisphere where second mapping symbols Amendment offset vector corresponding with the 4th group of data is found out, the amendment offset vector includes I tributary signals and Q branch roads Signal；

Second mapping symbols are added with the amendment offset vector, the 3rd mapping symbols are obtained；

Quadrature amplitude modulation QAM is carried out to the 3rd mapping symbols, the 2nd 2 is obtainedⁿQam signal；

Send the described 2nd 2ⁿQam signal is to receiving terminal, so that the receiving terminal obtains described to be modulated by data demodulation Data.

2. the method as described in claim 1, it is characterised in that it is described using first group of data as address of tabling look-up, from pre- Found out in first planisphere of the containment mapping symbol put and corresponding with first group of data include the first of I tributary signals Vector value includes：

The selection address of logic circuit using first group of data as a multiselect, 2 included from first planisphere^{n /2}An I tributary signal corresponding with first group of data is selected in individual I tributary signals, and by the I tributary signals of the selection It is used as primary vector value；

It is described using second group of data as address of tabling look-up, found out from the first planisphere of preset containment mapping symbol The primary vector value comprising Q tributary signals corresponding with second group of data includes：

The selection address of logic circuit using second group of data as a multiselect, 2 included from first planisphere^{n /2}A Q tributary signal corresponding with first group of data is selected in individual Q tributary signals, and by the Q tributary signals of the selection It is used as secondary vector value.

3. the method as described in claim 1, it is characterised in that described to wait to adjust by described according to the pre-set second division rule Data processed are divided into after the 3rd group of data and the 4th group of data, it is described using the 4th group of data as address of tabling look-up, from described Amendment corresponding with the 4th group of data is found out in the region of second planisphere where second mapping symbols to offset to Amount, before the amendment offset vector is comprising I tributary signals and Q tributary signals, methods described also includes：

The 4th group of data are subjected to Gray code；

It is described using the 4th group of data as address of tabling look-up, the area of second planisphere where from second mapping symbols Amendment offset vector corresponding with the 4th group of data is found out in domain, the amendment offset vector includes I tributary signals and Q Tributary signal includes：

Using the result of the Gray code as address of tabling look-up, the area of second planisphere where from second mapping symbols Amendment offset vector corresponding with the result is found out in domain, the amendment offset vector is believed comprising I tributary signals and Q branch roads Number.

4. the method as described in claim 1, it is characterised in that it is described using the 3rd group of data as address of tabling look-up, from elder generation The second mapping symbols corresponding with the 3rd group of data are found out in second planisphere of the containment mapping symbol of setting to be included：

Using the selection address of the 3rd group of logic circuit of the data as a multiselect one, from the second planisphere Zhong Ge areas The second mapping symbols corresponding with the 3rd group of data are selected in domain in preset reference mapping symbols.

5. a kind of method of demapping, it is characterised in that including：

Receive transmitting terminal and send 2ⁿQam signal；

To described 2ⁿQam signal is demodulated, and obtains mapping symbols；

When the n is even number, the primary vectors of the I tributary signals that the mapping symbols are included is as address of tabling look-up, from pre- First group of data corresponding with the I tributary signals are found out in the 3rd planisphere comprising bit data put；

The secondary vector for the Q tributary signals that the mapping symbols are included is looked into as address of tabling look-up from the 3rd planisphere Find out second group of data corresponding with the Q tributary signals；

First group of data and second group of data are spliced, described 2 are obtainedⁿThe corresponding original number of qam signal According to；

When n is odd number, to described 2ⁿQam signal is demodulated, and is obtained after mapping symbols, methods described also includes：

Low t/2 progress Gray codes of the I tributary signals of the mapping symbols and Q tributary signals are obtained into number of coded bits According to；

By the 4th planisphere comprising bit data pre-set with the origin mapping symbols in the region of the 4th planisphere The translation track for moving to the preset reference mapping symbols in the region is translated；Wherein, the 4th planisphere includes 2^n-t Individual region, each region includes 2^tIndividual mapping symbols, t is natural number, and t<n；

The division arithmetic that the I tributary signals and Q tributary signals of the mapping symbols are carried out rounding except t respectively, by the division The I tributary signals of the result of computing are multiplied by N multiplying, and by the result of the multiplying and the Q of the division arithmetic The result of tributary signal finds out coset bit data as address of tabling look-up from the 4th planisphere after the translation；Wherein, The N is the quantity of the bit data comprising the most a line of bit data in the 4th planisphere；

The coded-bit data are spliced with the coset bit data, described 2 are obtainedⁿThe corresponding original of qam signal Beginning data.

6. a kind of modulating equipment, it is characterised in that including：Acquiring unit, the first division unit, the first lookup unit, second are looked into Table unit, combining unit, the first modulating unit and the first transmitting element, wherein：

The acquiring unit, for obtaining data to be modulated, the data to be modulated include n modulation bit；

First division unit, for when n is even number, according to the first division rule pre-set by the number to be modulated According to being divided into first group of data and second group of data；

First lookup unit, for using first group of data as address of tabling look-up, from preset containment mapping symbol The primary vector value for including I tributary signals corresponding with first group of data is found out in first planisphere；

Second lookup unit, for second group of data, as address of tabling look-up, to be searched from first planisphere Go out the secondary vector value for including Q tributary signals corresponding with second group of data；

The combining unit, for the primary vector value to be merged with the secondary vector value, obtains the first mapping symbols；

First modulating unit, for carrying out quadrature amplitude modulation QAM to first mapping symbols, obtains the 1stⁿQAM is adjusted Signal processed；

First transmitting element, for sending the described 1stⁿQam signal is to receiving terminal, so that the receiving terminal passes through Data demodulation obtains the data to be modulated；

Second division unit, for when n is odd number, dividing rule according to second pre-set and being divided into the data to be modulated 3rd group of data and the 4th group of data, wherein, the 3rd group of data include the coset bit of n-t bits, the 4th group of number According to including the coded-bit of t bits, the t is the integer more than zero, and t<n；

3rd lookup unit, for using the 3rd group of data as address of tabling look-up, from the of the containment mapping symbol first set The second mapping symbols corresponding with the 3rd group of data are found out in two planispheres；Wherein, second planisphere includes 2^n-t Individual region, each region includes 2^tIndividual mapping symbols；

4th lookup unit, for using the 4th group of data as address of tabling look-up, it is described where from second mapping symbols Amendment offset vector corresponding with the 4th group of data, the amendment offset vector bag are found out in the region of second planisphere Tributary signal containing I and Q tributary signals；

Adder unit, for second mapping symbols to be added with the amendment offset vector, obtains the 3rd mapping symbols；

Second modulating unit, for carrying out quadrature amplitude modulation QAM to the 3rd mapping symbols, obtains the 2nd 2ⁿQAM modulation is believed Number；

Second transmitting element, for sending the described 2nd 2ⁿQam signal is to receiving terminal, so that the receiving terminal passes through data Demodulation obtains the data to be modulated.

7. equipment as claimed in claim 6, it is characterised in that first lookup unit is additionally operable to first group of data As the selection address of the logic circuit of a multiselect, 2 included from first planisphere^n/2One is selected in individual I tributary signals Individual I tributary signals corresponding with first group of data, and it regard the I tributary signals of the selection as primary vector value；

Second lookup unit is additionally operable to the selection address of the logic circuit as a multiselect using second group of data, from First planisphere include 2^n/2A Q tributary signal corresponding with first group of data is selected in individual Q tributary signals, And it regard the Q tributary signals of the selection as secondary vector value.

8. equipment as claimed in claim 6, it is characterised in that the equipment also includes：

Coding unit, for the 4th group of data to be carried out into Gray code；

4th lookup unit is additionally operable to the result of the Gray code as address of tabling look-up, from second mapping symbols Amendment offset vector corresponding with the result, the amendment offset vector are found out in the region of place second planisphere Include I tributary signals and Q tributary signals.

9. equipment as claimed in claim 6, it is characterised in that the 3rd lookup unit is additionally operable to the 3rd group of data As the selection address of the logic circuit of a multiselect one, reference preset in each region mapping symbol from second planisphere The second mapping symbols corresponding with the 3rd group of data are selected in number.

10. a kind of demodulated equipment, it is characterised in that including：Receiving unit, demodulating unit, the first lookup unit, second are tabled look-up list Member and the first concatenation unit, wherein：

The receiving unit, 2 are sent for receiving transmitting terminalⁿQam signal；

The demodulating unit, for described 2ⁿQam signal is demodulated, and obtains mapping symbols；

First lookup unit, for when the n be even number when, the first of the I tributary signals that the mapping symbols are included Vector is found out corresponding with the I tributary signals as address of tabling look-up from preset the 3rd planisphere comprising bit data First group of data；

Second lookup unit, for the secondary vector of Q tributary signals that includes the mapping symbols as address of tabling look-up, Second group of data corresponding with the Q tributary signals are found out from the 3rd planisphere；

First concatenation unit, for first group of data and second group of data to be spliced, obtains described 2ⁿThe corresponding initial data of qam signal；

Coding unit, for when n is odd number, low t/2 of the I tributary signals of the mapping symbols and Q tributary signals to be entered Row Gray code obtains coded-bit data；

Translation unit, for by the 4th planisphere comprising bit data pre-set with the region of the 4th planisphere The translation track that origin mapping symbols move to the preset reference mapping symbols in the region is translated；Wherein, the described 4th Planisphere includes 2^n-tIndividual region, each region includes 2^tIndividual mapping symbols, t is natural number, and t<n；

3rd lookup unit, for the I tributary signals and Q tributary signals of the mapping symbols to be carried out except removing that t is rounded respectively Method computing, N multiplying is multiplied by by the I tributary signals of the result of the division arithmetic, and by the result of the multiplying Result with the Q tributary signals of the division arithmetic is found out as address of tabling look-up from the 4th planisphere after the translation Coset bit data；Wherein, the N is the number of the bit data comprising the most a line of bit data in the 4th planisphere Amount；

Second concatenation unit, for the coded-bit data to be spliced with the coset bit data, obtains described 2ⁿThe corresponding initial data of qam signal.

11. a kind of system for modulating mapping, it is characterised in that including：As any one of claim 6-9 modulating equipment and Demodulated equipment as claimed in claim 10.