CN107294690A - A kind of modulation symbol transmission method and transmission equipment - Google Patents

Abstract

A modulation symbol transmission method and a sending device, which are used to reduce the error probability of the bit sequence to be sent of the sending device obtained by the receiving device through modulation symbol detection, and improve system communication performance. The method includes: the sending device modulates the bit sequence to be sent into M modulation symbols according to the set modulation mode, and M is an integer greater than 1; the sending device determines M resource units, and maps the M modulation symbols one-to-one to M resource units, and send to the receiving device.

Description

Modulation symbol transmission method and sending device

technical field

The present invention relates to the field of wireless communication, in particular to a modulation symbol transmission method and a transmission device.

Background technique

In the existing wireless communication technology, as shown in FIG. 1 , generally, the sending device modulates the bit sequence to be sent into a modulation symbol, and maps the modulation symbol to a resource unit for transmission to the receiving device. However, the modulation symbols transmitted by the sending device are easily affected by various factors such as wireless channel path loss, shadowing effect, multipath fading, etc., so that the signal-to-interference-noise ratio of the modulation symbols received by the receiving device on a single resource unit is low, causing the receiving device The bit sequence obtained by modulation symbol detection has a high error probability, which seriously affects the reliability of communication.

In order to reduce the error probability of the receiving device detecting the bit sequence and improve the reliability of communication, the existing wireless communication system can use spread spectrum technology for communication. As shown in Figure 2, the sending device modulates the bit sequence to be sent into a modulation symbol, and the After the modulation symbols are multiplied by different real numbers, the obtained different products are respectively mapped to multiple resource units and transmitted to the receiving device.

In the scheme of communication based on spread spectrum technology, since the signal transmitted on each resource unit is the product of the same modulation symbol and a real number, the transmission performance of this scheme is equivalent to transmitting the same modulation symbol on all resource units . The modulation symbol carries the information of each bit in the bit sequence to be sent. Since the reliability of the information of different bits carried in the modulation symbol is greatly different, the detection performance of the receiving device is affected by the bit information with the lowest reliability. This scheme does not No improvement has been made on the reliability difference of bit information carried by modulation symbols. Therefore, in the scheme of communicating according to the spread spectrum technology, the average error probability of the bit sequence to be transmitted of the transmitting device obtained by the receiving device through modulation symbol detection is still relatively large.

Contents of the invention

Embodiments of the present invention provide a modulation symbol transmission method and a sending device, which are used to reduce the error probability of the bit sequence to be sent of the sending device obtained by the receiving device through modulation symbol detection, and improve system communication performance.

In the first aspect, a modulation symbol transmission method provided by an embodiment of the present invention includes:

The sending device modulates the bit sequence to be sent into M modulation symbols according to the set modulation mode, where M is an integer greater than 1;

The sending device determines M resource units, maps the M modulation symbols one-to-one to the M resource units, and sends the message to the receiving device.

Wherein, the modulation method refers to the modulation method used when modulating the bit sequence based on the adopted modulation technology. The modulation method can modulate the bit sequence to be transmitted into a signal with amplitude and phase. The signal is represented by a complex number, the The complex numbers are called modulation symbols. The bit sequence to be sent refers to a sequence composed of several bits arranged in a certain order, and the number of bits contained in the bit sequence to be sent is equal to the modulation order of the set modulation mode.

In this way, the transmitting device modulates the bit sequence to be transmitted into multiple modulation symbols, so that the transmitting device averages the reliability of the bit information carried by the modulation symbols sent to the receiving device, and improves the reliability of different bit information carried by the modulation symbols. In order to reduce the error probability of the to-be-transmitted bit sequence of the sending device obtained by the receiving device through modulation symbol detection, the system communication performance is improved.

In a possible implementation manner, the method for the transmitting device to modulate the bit sequence to be transmitted into M modulation symbols according to the set modulation mode includes:

The sending device respectively rearranges the bit positions in the to-be-sent bit sequences according to M kinds of bit position arrangements, to obtain M to-be-modulated bit sequences;

The sending device modulates each of the M bit sequences to be modulated according to the set modulation mode, respectively, to obtain the M modulation symbols.

In this way, the transmitting device obtains multiple bit sequences to be modulated by reordering the bit sequences to be transmitted, and then the multiple bit sequences to be modulated can obtain multiple modulation symbols through modulation, so that the transmission device will transmit to the receiving device. The reliability of the bit information is averaged to improve the reliability difference between different bit information carried by the modulation symbols.

In a possible implementation manner, before the sending device respectively modulates each of the M bit sequences to be modulated, the method further includes:

The sending device selects a set number of bit sequences to be modulated from the M bit sequences to be modulated; the set number is less than or equal to the M;

For each bit sequence to be modulated in the set number of bit sequences to be modulated, the sending device performs an inversion operation on a bit at a set position in each bit sequence to be modulated.

In this way, reliability averaging of the bit information carried by the modulation symbols sent to the receiving device is further realized, and reliability differences between different bit information carried by the modulation symbols are improved.

In a possible implementation manner, the sending device modulates each of the M bit sequences to be modulated respectively, and the method for obtaining the M modulation symbols includes:

The sending device maps each bit sequence to be modulated to obtain a modulation symbol according to each bit sequence to be modulated and the mapping relationship between the bit sequence and the modulation symbol;

Wherein, the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be modulated, and the mapping relationship between the bit sequence and the modulation symbol is that a bit sequence is mapped to a modulation symbol, and the bit sequence contains The number of bits is equal to the modulation order of the set modulation mode.

In this way, the sending device modulates the bit sequence to be modulated to obtain its corresponding modulation symbol by searching for the mapping relationship between the bit sequence and the modulation symbol.

In a possible implementation manner, the method for the transmitting device to modulate the bit sequence to be transmitted into M modulation symbols includes:

The sending device maps the bit sequence to be sent to obtain M modulation symbols according to the bit sequence to be sent and the mapping relationship between the bit sequence and the modulation symbol;

Wherein, the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be sent, and the mapping relationship between the bit sequence and the modulation symbol is that a bit sequence is mapped to M modulation symbols, and the bit sequence includes The number of bits is equal to the modulation order of the set modulation mode.

In this way, the sending device realizes the modulation of the bit sequence to be transmitted to obtain its corresponding multiple modulation symbols by searching the mapping relationship between the bit sequence and the modulation symbol.

In a possible implementation manner, the set modulation scheme includes one modulation scheme or at least two modulation schemes among multiple modulation schemes with the same modulation order.

In a second aspect, a modulation symbol transmission method provided by an embodiment of the present invention includes:

The receiving device receives M modulation symbols sent by the sending device mapped on M resource units, where M is an integer greater than 1, and the M modulation symbols are converted by the sending device to the bit sequence to be transmitted according to the set modulation mode modulated;

The receiving device determines the detection information of the bit sequence to be sent by the sending device according to the M modulation symbols.

In this way, since the sending device modulates the bit sequence to be sent into multiple modulation symbols, the sending device averages the reliability of the bit information carried by the modulation symbols sent to the receiving device, improving the reliability of different bit information carried by the modulation symbols. In order to reduce the error probability of the to-be-transmitted bit sequence of the sending device obtained by the receiving device through modulation symbol detection, the system communication performance is improved.

In a possible implementation manner, the detection information of the to-be-sent bit sequence of the sending device includes a hard decision result of the to-be-sent bit sequence and/or soft information of the to-be-sent bit sequence.

In a third aspect, an embodiment of the present invention provides a sending device, where the sending device has a function of implementing the behavior of the sending device in the above method. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In an optional implementation solution, the structure of the sending device includes a processor and a transmitter, the processor is configured to support the sending device to perform corresponding functions in the above method; the transmitter is configured to send the above The data or messages involved in the method; the sending device may also include a memory, the memory is used to be coupled with the processor, which stores the necessary program instructions and data of the sending device; the sending device may also include a receiver, the Receivers are used to receive messages or data.

In a fourth aspect, an embodiment of the present invention provides a receiving device, where the receiving device has a function of implementing the behavior of the receiving device in the above method. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In an optional implementation solution, the structure of the receiving device includes a receiver and a processor, the receiver is used to receive the data or messages involved in the above method; the processor is configured to support the receiving device Execute the corresponding functions in the above method; the receiving device may also include a memory, the memory is used to be coupled with the processor, which stores the necessary program instructions and data of the receiving device; the receiving device may also include a transmitter, the Transmitters are used to send messages or data.

In a fifth aspect, an embodiment of the present invention provides a wireless communication system, where the wireless communication system includes the sending device and the receiving device described in any one of the first aspect to the fourth aspect.

In a sixth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the sending device according to any one of the first to fifth aspects above, which includes instructions for executing the above aspects The designed program.

In a seventh aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the receiving device according to any one of the first to fifth aspects above, which includes instructions for executing the above aspects The designed program.

In an eighth aspect, an embodiment of the present invention provides a chip configured to execute the method executed by the sending device described in any one of the first aspect to the fifth aspect.

In a ninth aspect, an embodiment of the present invention provides a chip configured to execute the method executed by the receiving device described in any one of the first aspect to the fifth aspect.

In the technical solution provided by the embodiments of the present invention, the sending device modulates the bit sequence to be sent into multiple modulation symbols, and transmits the multiple modulation symbols to the receiving device through multiple resource units. In this scheme, the sending device modulates the bit sequence to be sent into multiple modulation symbols, so that the sending device averages the reliability of the bit information carried by the transmitted modulation symbols, and improves the reliability of different bit information carried by the modulation symbols. difference, thereby reducing the error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device through modulation symbol detection, and improving system communication performance.

Description of drawings

FIG. 1 is a schematic diagram of a modulation symbol transmission method provided by the prior art;

FIG. 2 is a schematic diagram of a modulation symbol transmission method provided by the prior art;

FIG. 3 is a schematic flowchart of a modulation symbol transmission method provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of mapping between modulation symbols and resource units provided by an embodiment of the present invention;

FIG. 5 is a schematic flow chart of a modulation symbol transmission method provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a sending device provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a sending device provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a receiving device provided by an embodiment of the present invention;

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

FIG. 10 is a schematic structural diagram of a wireless communication system provided by an embodiment of 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 making creative efforts belong to the protection scope of the present invention.

Embodiments of the present invention provide a modulation symbol transmission method and a sending device. The sending device modulates a bit sequence to be sent into a plurality of modulation symbols, and transmits the plurality of modulation symbols to a receiving device through a plurality of resource units. In this scheme, the sending device modulates the bit sequence to be sent into multiple modulation symbols, so that the sending device averages the reliability of the bit information carried by the transmitted modulation symbols, and improves the reliability of different bit information carried by the modulation symbols. difference, thereby reducing the error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device through modulation symbol detection, and improving system communication performance. Wherein, the method and the device are based on the same inventive concept. Since the method and the device have similar problem-solving principles, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

The technical solution provided by the embodiments of the present invention can be applied to a wireless communication system, and is suitable for a scenario where a sending device sends information to a receiving device. Taking the Long Term Evolution (LTE) system as an example, for uplink transmission, the sending device can be a terminal device, and the receiving device can be a base station; for downlink transmission, the sending device can be a base station, and the receiving device can be a terminal device.

Wherein, the communication system of the wireless communication system applied in the embodiment of the present invention includes but not limited to: Global System of Mobile Communication (Global System of Mobile communication, GSM), Code Division Multiple Access (Code Division Multiple Access, CDMA) IS-95, code Code Division Multiple Access (CDMA) 2000, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Wideband Code Division Multiple Access (WCDMA), Time Division Duplex-Long Term Evolution (Time Division Duplexing-Long Term Evolution, TDD LTE), Frequency Division Duplexing-Long Term Evolution (FDD LTE), Long Term Evolution-Advanced (Long Term Evolution-Advanced, LTE -advanced), Personal Handy-phone System (PHS), Wireless Fidelity (Wi-Fi), Worldwide Interoperability for Microwave Access (WiMAX), and future Evolving various wireless communication standards.

The terminal device may be a wireless terminal, and the wireless terminal may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (for example, RAN, Radio Access Network), and the wireless terminal can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a mobile terminal The computers, which may be, for example, portable, pocket, handheld, built-in or vehicle-mounted mobile devices, exchange speech and/or data with the radio access network. For example, personal communication service (Personal Communication Service, PCS) telephone, cordless telephone, session initiation protocol (SIP) telephone, wireless local loop (Wireless Local Loop, WLL) station, personal digital assistant (Personal Digital Assistant, PDA) and other equipment . A wireless terminal can also be called a subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal (Remote Terminal), Access Terminal (Access Terminal), User Terminal (User Terminal), User Agent (User Agent), User Equipment (User Device), or User Equipment (User Equipment).

For a GSM system, a base station may include a base transceiver station (Base Transceiver Station, BTS) and/or a base station controller (Base Station Controller, BSC); for a TD-SCDMA system, a WCDMA system, a base station may include a node B (NodeB, NB) and/or a radio network controller (Radio Network Controller, RNC). For an LTE system, the base station may be an eNB.

A modulation symbol transmission method provided by an embodiment of the present invention is described in detail below.

As shown in Figure 3, on the sending device side, an embodiment of the present invention provides a modulation symbol transmission method, including:

S301. The sending device modulates the bit sequence to be sent into M modulation symbols according to the set modulation mode, where M is an integer greater than 1;

S302. The sending device determines M resource units, maps the M modulation symbols one-to-one to the M resource units, and sends the result to the receiving device.

In the embodiment of the present invention, the set modulation method may include one modulation method or at least two modulation methods among multiple modulation methods with the same modulation order, and the modulation order of the modulation method is equal to the bit sequence modulated by the modulation method The number of bits contained. The modulation method refers to the modulation method used when modulating the bit sequence based on the modulation technology used, that is, the method of mapping a bit sequence to a modulation symbol. For example, the modulation technology used is 16 quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM) or 64QAM, etc. The bit sequence to be sent refers to a sequence composed of several bits arranged in a certain order, and the number of bits contained in the bit sequence to be sent is equal to the modulation order of the set modulation mode; for example, the bit sequence to be sent can be {b ₁ , In the form of b ₂ ,...,b _L }, L represents the length of the bit sequence to be sent, that is, the number of bits contained in the bit sequence to be sent, and L is equal to the modulation order of the set modulation mode adopted by the sending device, Taking the debugging mode of 16QAM as an example, the modulation order of the debugging mode of 16QAM is 4, and the number of bits included in the bit sequence to be sent at this time is 4. By means of modulation, the bit sequence to be transmitted can be modulated into a signal with amplitude and phase, which is represented by a complex number called a modulation symbol.

The resource unit in the embodiment of the present invention may be a time-frequency resource unit, but with the development of technology, the resource unit in the embodiment of the present invention is not limited to the time-frequency resource unit. In the field of wireless communication, transmission resources can be distributed in multiple dimensions such as time domain, frequency domain, and code domain. Taking the LTE system as an example, in the time domain, its largest time unit is a radio frame with a length of 10 milliseconds, which can be divided into 10 subframes with a length of 1 millisecond, and each subframe can be divided into two subframes with a length of 0.5 millisecond time slots, each time slot includes 6 or 7 Orthogonal Frequency Division Multiplexing (OFDM) symbols. In the frequency domain, the system divides the available frequency resources into several subcarriers, and each subcarrier occupies a bandwidth of 15000 Hz in the frequency domain. In the LTE system, the minimum unit of resources consists of the duration of one OFDM symbol in the time domain and the bandwidth occupied by one subcarrier in the frequency domain, which is called a time-frequency resource unit.

In the embodiment of the present invention, S301 may be implemented through the following three solutions.

Option 1 includes the following steps:

Step 1: The transmitting device respectively rearranges the bit positions in the bit sequence to be transmitted according to the arrangement order of M bit positions, and obtains M bit sequences to be modulated.

Wherein, the arrangement order of the bit positions may be set or random.

Step 2: The sending device selects a set number of bit sequences to be modulated from the M bit sequences to be modulated; for each bit sequence to be modulated in the set number of bit sequences to be modulated, the sending device selects each bit sequence to be modulated The bit at the set position in the bit sequence is negated.

Wherein, the set number is less than or equal to M; for different to-be-modulated bit sequences, the number of bits to be reversed can be the same or different, and the bit positions to be reversed can be the same or different.

Step 3: The sending device modulates each of the M bit sequences to be modulated respectively according to the set modulation mode to obtain M modulation symbols.

Wherein, the modulation mode for modulating the M bit sequences to be modulated can be one modulation mode or at least two modulation modes among multiple modulation modes with the same modulation order, and at least two modulation modes among the multiple modulation modes are adopted When , the types of modulation modes used are less than or equal to M types.

Example 1

Assume that the set modulation mode is 16QAM, the modulation order of 16QAM is 4, and the bit sequence to be transmitted is {b ₁ , b ₂ , b ₃ , b ₄ }. In step 1, according to M = 2 sorts of bit positions, rearrange the bit positions in {b ₁ , b ₂ , b ₃ , b ₄ } to obtain two bit sequences to be modulated, which are respectively {b ₃ , b ₁ , b ₄ , b ₂ } and {b ₁ , b ₃ , b ₂ , b ₄ }. In step 2, choose to invert the second bit b ₃ and the fourth bit b ₄ in the second bit sequence {b ₁ , b ₃ , b ₂ , b ₄ } to obtain the bit to be modulated sequence In step three, 16QAM is used to treat the modulation bit sequence {b ₃ , b ₁ , b ₄ , b ₂ } and Perform modulation to obtain 2 modulation symbols S ₁ and S ₂ .

Optionally, in step 3, the sending device can map each bit sequence to be modulated to obtain a modulation symbol by looking up the mapping relationship between the bit sequence and the modulation symbol, that is, to obtain M modulation symbols. Wherein, the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be modulated, the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to one modulation symbol, and the number of bits contained in the bit sequence is equal to the number of bits used by the sending device. The modulation order of the set modulation mode.

Optionally, the sending device determines the mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode. Taking binary bits as an example, if the modulation order of the set modulation method is L, that is, the bit sequence modulated by the set modulation method contains L bits, then the bit sequence modulated by the set modulation method has 2 There are ^L kinds of possibilities, and there are 2 ^L kinds of possibilities for modulating and outputting the modulation symbols through the set modulation mode. According to the set modulation mode, the mapping relationship between the bit sequence and the modulation symbol is obtained. In the mapping relationship, one bit sequence corresponds to one modulation symbol. .

Take the set modulation mode as 16QAM as an example, the modulation order of 16QAM is 4, the bit sequence {b ₁ , b ₂ , b ₃ , b ₄ } modulated by 16QAM can have 2 ⁴ = 16 possibilities, and the 16QAM modulation output There are also 2 ⁴ =16 possible forms of modulation symbols. Exemplarily, the mapping relationship between the bit sequence and the modulation symbol determined according to the modulation mode 16QAM can be shown in Table 1 below, where the relationship between a and b satisfies a ² +b ² =1, for example

Table I

bit sequence {b ₁ , b ₂ , b ₃ , b ₄ } Modulation symbol for bit sequence mapping 0000 -b+b*j 0001 a+b*j 0010 -a+b*j 0011 b+b*j 0100 -b-a*j 0101 a-b*j 0110 -a-b*j 0111 b-a*j 1000 -b+a*j 1001 a+a*j 1010 -a+a*j 1011 b+a*j 1100 -b-b*j 1101 a-b*j 1110 -a-b*j 1111 b-b*j

In step 3, by looking up Table 1, the modulation symbol S ₁ mapped to the bit sequence to be modulated {b ₃ , b ₁ , b ₄ , b ₂ } and the bit sequence to be modulated can be obtained Mapped modulation symbols S ₂ . For example, when {b ₃ , b ₁ , b ₄ , b ₂ } is {0, 1, 1, 0}, by looking up Table 1, the modulation symbol S ₁ mapped to {0, 1, 1, 0} is - ab*j; When it is {1, 1, 0, 0}, by looking up Table 1, the modulation symbol S ₂ mapped to {1, 1, 0, 0} is obtained as -bb*j.

If the set modulation method includes at least two modulation methods among multiple modulation methods with the same modulation order, the mapping relationship between the bit sequence and the modulation symbol is determined according to each modulation method, and the bit sequence determined according to one modulation method and The mapping relation of the modulation symbols is that a bit sequence is mapped to a modulation symbol. For example, a modulation scheme can determine a mapping relation list similar to that shown in Table 1. When modulating M bit sequences to be modulated according to the determined mapping relationship between bit sequences and modulation symbols, for a bit sequence to be modulated, determine the modulation method used for it, and determine the to-be-modulated bit sequence by searching the mapping relationship list corresponding to the modulation method The modulation symbol to which the modulation bit sequence maps.

Option 2 includes the following steps:

Step 1: The transmitting device respectively rearranges the bit positions in the bit sequence to be transmitted according to the arrangement order of M bit positions, and obtains M bit sequences to be modulated.

Wherein, the arrangement order of the bit positions may be set or random.

Step 2: The transmitting device separately modulates each of the M bit sequences to be modulated according to the set modulation mode to obtain M modulation symbols.

Wherein, the modulation mode for modulating the M bit sequences to be modulated can be one modulation mode or at least two modulation modes among multiple modulation modes with the same modulation order, and at least two modulation modes among the multiple modulation modes are adopted When , the types of modulation modes used are less than or equal to M types.

Example 2

Assume that the set modulation mode is 16QAM, the modulation order of 16QAM is 4, and the bit sequence to be transmitted is {b ₁ , b ₂ , b ₃ , b ₄ }. In step 1, according to M = 2 sorts of bit positions, rearrange the bit positions in {b ₁ , b ₂ , b ₃ , b ₄ } to obtain two bit sequences to be modulated, which are respectively {b ₃ , b ₁ , b ₄ , b ₂ } and {b ₁ , b ₃ , b ₂ , b ₄ }. In step 2, 16QAM is used to modulate the bit sequences to be modulated {b ₃ , b ₁ , b ₄ , b ₂ } and {b ₁ , b ₃ , b ₂ , b ₄ } to obtain two modulation symbols S ₁ and S ₂ .

Optionally, in step 2, the sending device can map each bit sequence to be modulated to obtain a modulation symbol by looking up the mapping relationship between the bit sequence and the modulation symbol, that is, to obtain M modulation symbols. Wherein, the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be modulated, the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to one modulation symbol, and the number of bits contained in the bit sequence is equal to the number of bits used by the sending device. The modulation order of the set modulation mode.

Optionally, the sending device determines the mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode. Taking binary bits as an example, if the modulation order of the set modulation method is L, that is, the bit sequence modulated by the set modulation method contains L bits, then the bit sequence modulated by the set modulation method has 2 There are ^L kinds of possibilities, and there are 2 ^L kinds of possibilities for modulating and outputting the modulation symbols through the set modulation mode. According to the set modulation mode, the mapping relationship between the bit sequence and the modulation symbol is obtained. In the mapping relationship, one bit sequence corresponds to one modulation symbol. .

Take the set modulation mode as 16QAM as an example, the modulation order of 16QAM is 4, the bit sequence {b ₁ , b ₂ , b ₃ , b ₄ } modulated by 16QAM can have 2 ⁴ = 16 possibilities, and the 16QAM modulation output There are also 2 ⁴ =16 possible modulation symbols for . Exemplarily, the mapping relationship between the bit sequence and the modulation symbol determined according to the modulation mode 16QAM can be shown in Table 1, where the relationship between a and b satisfies a ² +b ² =1, for example

In step 2, by looking up Table 1, the modulation symbol S ₁ mapped to the bit sequence to be modulated {b ₃ , b ₁ , b ₄ , b ₂ }, and the bit sequence to be modulated {b ₁ , b ₃ , b ₂ , b ₄ } mapped modulation symbol S ₂ . For example, when {b ₃ , b ₁ , b ₄ , b ₂ } is {0, 1, 1, 0}, by looking up Table 1, the modulation symbol S ₁ mapped to {0, 1, 1, 0} is - ab*j; when {b ₁ , b ₃ , b ₂ , b ₄ } is {1, 0, 0, 1}, by looking up Table 1, get the modulation symbol S ₂ mapped to {1, 0, 0, 1} is a+a*j.

If the set modulation method includes at least two modulation methods among multiple modulation methods with the same modulation order, the mapping relationship between the bit sequence and the modulation symbol is determined according to each modulation method, and the bit sequence determined according to one modulation method and The mapping relation of the modulation symbols is that a bit sequence is mapped to a modulation symbol. For example, a modulation scheme can determine a mapping relation list similar to that shown in Table 1. When modulating M bit sequences to be modulated according to the determined mapping relationship between bit sequences and modulation symbols, for a bit sequence to be modulated, determine the modulation method used for it, and determine the to-be-modulated bit sequence by searching the mapping relationship list corresponding to the modulation method The modulation symbol to which the modulation bit sequence maps.

Option three includes the following steps:

The sending device maps the bit sequence to be sent to obtain M modulation symbols according to the bit sequence to be sent and the mapping relationship between the bit sequence and the modulation symbol;

Wherein, the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be transmitted, and the mapping relationship between the bit sequence and the modulation symbol is that a bit sequence is mapped to M modulation symbols, and the number of bits contained in the bit sequence is equal to the set modulation Mode modulation order.

Optionally, the sending device determines the mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode. Taking binary bits as an example, if the modulation order of the set modulation method is L, that is, the bit sequence modulated by the set modulation method contains L bits, then the bit sequence modulated by the set modulation method has 2L There are two possibilities, and there are 2 ^L possibilities for modulating and outputting the modulation symbol through the set modulation mode. According to the set modulation method, the mapping relationship between the bit sequence and the modulation symbol is obtained. There are 2 ^L bit sequences included in the mapping relationship. For any bit sequence, M modulation symbols are selected from the 2 ^L modulation symbols as the The modulation symbols mapped to any bit sequence, wherein the selection method of selecting M modulation symbols can be set or random. Therefore, in the mapping relationship between bit sequences and modulation symbols obtained according to the set modulation scheme, any bit sequence corresponds to M modulation symbols.

Example three

Take the set modulation mode as 16QAM as an example, the modulation order of 16QAM is 4, the bit sequence {b ₁ , b ₂ , b ₃ , b ₄ } modulated by 16QAM can have 2 ⁴ = 16 possibilities, and the 16QAM modulation output There are also 2 ⁴ =16 possible forms of modulation symbols, and each bit sequence is mapped to two modulation symbols.

Exemplarily, the mapping relationship between the bit sequence and the modulation symbol determined according to the modulation mode 16QAM can be shown in Table 2, where the relationship between a and b satisfies a ² +b ² =1, for example

Table II

By looking up Table 2, the two modulation symbols S ₁ and S ₂ mapped to the bit sequence {b ₁ , b ₂ , b ₃ , b ₄ } to be transmitted can be determined, for example, {b ₁ , b ₂ , b ₃ , b ₄ } is {1, 0, 0, 1}, by looking up Table 2, the modulation symbol S ₁ mapped to {1, 0, 0, 1} is a+a*j, and S ₂ is -bb*j.

After the M modulation symbols are obtained through the above three schemes, through S302 provided in the embodiment of the present invention, the sending device can map the obtained M modulation symbols to M resource elements one-to-one, and send the result to the receiving device. As shown in Figure 4, taking M=2 and resource units as time-frequency resource units as an example, after the transmitting device obtains _two modulation symbols S1 and S2, it maps the modulation symbols S1 and S2 _one -to- _one to _two on the resource unit and send it to the receiving device.

The sending device sends the modulation symbol to the receiving device through the above method. As shown in FIG. 5, on the receiving device side, an embodiment of the present invention provides a modulation symbol transmission method, including:

S501. The receiving device receives M modulation symbols sent by the sending device mapped on M resource units, where M is an integer greater than 1, and the M modulation symbols are obtained by modulating the bit sequence to be sent by the sending device;

S502. The receiving device determines the detection information of the bit sequence to be sent by the sending device according to the M modulation symbols.

Wherein, the detection information of the bit sequence to be sent includes a hard decision result of the bit sequence to be sent and/or soft information of the bit sequence to be sent. The hard judgment result refers to the bit sequence obtained by the judgment of the receiving device; the soft information can have several representation methods. Exemplarily, for the bit b ₁ in the bit sequence to be sent, its soft information at the receiving device can be expressed as Where P(b ₁ =1) represents the probability that b ₁ obtained by the receiving device through detection is 1, and P(b ₁ =0) represents the probability that b ₁ obtained by the receiving device through detection is 0, then the bit sequence to be transmitted The soft information of can be expressed as

The receiving device may use a joint detection method to determine the detection information of the bit sequence to be sent by the sending device according to the M modulation symbols. The detection method may include: the receiving device receives M modulation symbols on M resource units, performs symbol combination on the received M modulation symbols, and the receiving device demodulates the combined symbols to obtain the bit sequence to be transmitted hard judgment. The check detection method may also include: the receiving device respectively performs soft demodulation on the modulation symbols transmitted on each resource unit, obtains soft information corresponding to different bits in the bit sequence to be transmitted, and combines the soft information corresponding to the same bit, Finally, the combined soft information corresponding to different bits is used to restore the bit sequence to be sent. The combining method is, for example, maximum ratio combining, which is a receive diversity combining method, which means that the combined signal is equal to the weighted sum of the signals received on each resource unit.

It should be noted that the modulation symbol transmission method on the receiving device side provided by the embodiment of the present invention is based on the same idea as the modulation symbol transmission method on the sending device side, and the modulation symbol transmission method on the receiving device side can be combined with the existing technology. means to achieve.

In the technical solution provided by the embodiments of the present invention, the sending device modulates the bit sequence to be sent into multiple modulation symbols, and sends the multiple modulation symbols to the receiving device through multiple resource units. In this scheme, the sending device modulates the bit sequence to be sent into multiple modulation symbols, so that the sending device averages the reliability of the bit information carried by the transmitted modulation symbols, and improves the reliability of different bit information carried by the modulation symbols. difference, thereby reducing the error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device through modulation symbol detection, and improving system communication performance.

In the embodiment of the present invention, the wireless communication system adopts spread spectrum technology. After the transmitting device modulates the bit sequence to be transmitted into multiple modulation symbols, the multiple modulation symbols are sent to the receiving device through the same number of resource units as the modulation symbols. The probability that a resource unit experiences severe multipath fading and interference of a wireless channel at the same time is much smaller than the probability that a single resource unit experiences severe fading and interference, thereby reducing the risk of modulated signal transmission. The receiving device may adopt a joint detection method to improve the signal-to-interference-noise ratio of the received modulation symbols. Therefore, adopting the spread spectrum technology in the embodiment of the present invention can reduce the error probability of bit detection by the receiving device, so as to improve the reliability of communication.

FIG. 6 is a sending device provided by an embodiment of the present invention, and the sending device may adopt the method provided in the embodiment corresponding to FIG. 3 . The sending device 600 includes: a processing module 601 and a sending module 602 . in,

The processing module 601 is configured to modulate the bit sequence to be transmitted into M modulation symbols according to the set modulation mode, where M is an integer greater than 1; determine M resource units, and map the M modulation symbols one-to-one to M on the resource unit;

The sending module 602 is configured to send the M modulation symbols mapped one-to-one by the processing module 601 to the M resource units to the receiving device.

Optionally, when the processing module 601 modulates the bit sequence to be transmitted into M modulation symbols according to the set modulation mode, it is specifically used for:

The processing module 601 rearranges the bit positions in the bit sequence to be transmitted according to the arrangement order of the M bit positions to obtain M bit sequences to be modulated;

The processing module 601 modulates each of the M bit sequences to be modulated according to the set modulation mode to obtain M modulation symbols.

Optionally, before the processing module 601 modulates each bit sequence to be modulated in the M bit sequences to be modulated, it is also used to:

The processing module 601 selects a set number of bit sequences to be modulated from the M bit sequences to be modulated;

For each bit sequence to be modulated in the set number of bit sequences to be modulated, the processing module 601 performs an inversion operation on the bit at a set position in each bit sequence to be modulated.

Optionally, the processing module 601 modulates each of the M bit sequences to be modulated respectively, and when M modulation symbols are obtained, it is specifically used for:

The processing module 601 maps each bit sequence to be modulated to obtain a modulation symbol according to each bit sequence to be modulated and the mapping relationship between the bit sequence and the modulation symbol;

Wherein, the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be modulated, the mapping relationship between the bit sequence and the modulation symbol is that a bit sequence is mapped to a modulation symbol, and the number of bits contained in the bit sequence is equal to the set modulation mode modulation order.

Optionally, when the processing module 601 modulates the bit sequence to be transmitted into M modulation symbols, it is specifically used for:

The processing module 601 maps the bit sequence to be transmitted to obtain M modulation symbols according to the bit sequence to be transmitted and the mapping relationship between the bit sequence and the modulation symbol;

Wherein, the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be transmitted, and the mapping relationship between the bit sequence and the modulation symbol is that a bit sequence is mapped to M modulation symbols, and the number of bits contained in the bit sequence is equal to the set modulation Mode modulation order.

Optionally, the set modulation modes include one modulation mode or at least two modulation modes among multiple modulation modes with the same modulation order.

It should be noted that the division of the units in the embodiment of the present invention is schematic, and is only a logical function division, and there may be another division manner in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods in various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other various media that can store program codes. .

Based on the above embodiments, an embodiment of the present invention further provides a sending device. The sending device may adopt the method provided in the embodiment corresponding to FIG. 3 , and may be the same device as the sending device shown in FIG. 6 . Referring to FIG. 7, the sending device 700 includes: a processor 701, a transmitter 702, a bus 703, and a memory 704, wherein:

The processor 701, the transmitter 702, and the memory 704 are connected to each other through a bus 703; the bus 703 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 7 , but it does not mean that there is only one bus or one type of bus.

The processor 701 in FIG. 7 corresponds to the processing module 601 in FIG. 6 , and the transmitter 702 in FIG. 7 corresponds to the sending module 602 in FIG. 6 . The sending device 700 also includes a memory 704 for storing programs and the like. Specifically, the program may include program code including computer operation instructions. The memory 704 may include a random access memory (random access memory, RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor 701 executes the application program stored in the memory 704 to implement the above modulation symbol transmission method.

FIG. 8 is a receiving device provided by an embodiment of the present invention, and the receiving device may adopt the method provided in the embodiment corresponding to FIG. 5 . The receiving device 800 includes: a receiving module 801 and a processing module 802 . in,

The receiving module 801 is configured to receive M modulation symbols mapped on M resource units by the sending device, where M is an integer greater than 1, and the M modulation symbols are obtained by modulating the bit sequence to be sent by the sending device according to a set modulation mode ;

The processing module 802 determines, according to the M modulation symbols received by the receiving module 801 , the detection information of the bit sequence to be sent by the sending device.

Optionally, the detection information of the to-be-sent bit sequence of the sending device includes a hard decision result of the to-be-sent bit sequence and/or soft information of the to-be-sent bit sequence.

Based on the above embodiments, an embodiment of the present invention further provides a receiving device. The receiving device may adopt the method provided in the embodiment corresponding to FIG. 5 , and may be the same device as the receiving device shown in FIG. 8 . Referring to FIG. 9, the receiving device 900 includes: a receiver 901, a processor 902, a bus 903, and a memory 904, wherein:

The receiver 901, the processor 902 and the memory 904 are connected to each other through a bus 903; for ease of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.

The receiver 901 in FIG. 9 corresponds to the receiving module 801 in FIG. 8 , and the processor 902 in FIG. 9 corresponds to the processing module 802 in FIG. 8 . The receiving device 900 also includes a memory 904 for storing programs and the like. Specifically, the program may include program code including computer operation instructions. The processor 902 executes the application program stored in the memory 904 to implement the above modulation symbol transmission method.

Based on the above embodiments, an embodiment of the present invention provides a wireless communication system. As shown in FIG. 10, the wireless communication system 1000 includes a sending device 1001 and a receiving device 1002, wherein the sending device 1001 is used to implement the sending device in the above embodiments The implemented functions, the receiving device 1002 is configured to implement the functions implemented by the receiving device in the foregoing embodiments.

In summary, the embodiments of the present application provide a modulation symbol transmission method, a sending device, and a receiving device, which are used to reduce the error probability of the bit sequence to be sent by the sending device obtained by the receiving device through modulation symbol detection, and improve system communication performance.

While preferred embodiments of the present invention have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. In this way, if the modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (12)

1. A method for transmitting modulation symbols, comprising:

the method comprises the steps that a sending device modulates a bit sequence to be sent into M modulation symbols according to a set modulation mode, wherein M is an integer larger than 1;

the sending equipment determines M resource units, maps the M modulation symbols to the M resource units in a one-to-one mode, and sends the M modulation symbols to the receiving equipment.

2. The method of claim 1, wherein the transmitting device modulates a bit sequence to be transmitted into M modulation symbols according to the set modulation scheme, comprising:

the sending equipment rearranges the bit positions in the bit sequence to be sent according to the arrangement sequence of the M bit positions respectively to obtain M bit sequences to be modulated;

and the sending equipment modulates each bit sequence to be modulated in the M bit sequences to be modulated respectively according to the set modulation mode to obtain the M modulation symbols.

3. The method of claim 2, wherein before the transmitting device separately modulates each of the M sequences of bits to be modulated, further comprising:

the sending equipment selects a set number of bit sequences to be modulated from the M bit sequences to be modulated;

and for each bit sequence to be modulated in the set number of bit sequences to be modulated, the sending equipment performs an inversion operation on bits at set positions in each bit sequence to be modulated.

4. The method as claimed in claim 2 or 3, wherein the step of the transmitting device modulating each bit sequence to be modulated in the M bit sequences to be modulated separately to obtain the M modulation symbols comprises:

the sending equipment respectively maps each bit sequence to be modulated to obtain a modulation symbol according to each bit sequence to be modulated and the mapping relation between the bit sequence and the modulation symbol;

the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be modulated, the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to one modulation symbol, and the number of bits included in the bit sequence is equal to the modulation order of the set modulation mode.

5. The method of claim 1, wherein the transmitting device modulates a sequence of bits to be transmitted into M modulation symbols, comprising:

the sending equipment maps the bit sequence to be sent to obtain M modulation symbols according to the bit sequence to be sent and the mapping relation between the bit sequence and the modulation symbols;

the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be transmitted, the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to M modulation symbols, and the number of bits included in the bit sequence is equal to the modulation order of the set modulation mode.

6. The method according to any one of claims 1 to 5, wherein the set modulation scheme comprises at least two modulation schemes among one modulation scheme or a plurality of modulation schemes with the same modulation order.

7. A transmitting device, comprising:

the processing module is used for modulating a bit sequence to be transmitted into M modulation symbols according to a set modulation mode, wherein M is an integer greater than 1; determining M resource units, and mapping the M modulation symbols to the M resource units in a one-to-one manner;

a sending module, configured to send the M modulation symbols one-to-one mapped onto M resource units by the processing module to a receiving device.

8. The transmission apparatus as claimed in claim 7, wherein the processing module, when modulating the bit sequence to be transmitted into M modulation symbols according to the set modulation scheme, is specifically configured to:

the processing module rearranges the bit positions in the bit sequence to be transmitted according to the arrangement sequence of the M bit positions respectively to obtain M bit sequences to be modulated;

and the processing module modulates each bit sequence to be modulated in the M bit sequences to be modulated respectively according to the set modulation mode to obtain the M modulation symbols.

9. The transmitting device of claim 8, wherein before the processing module modulates each of the M bit sequences to be modulated separately, the processing module is further configured to:

the processing module selects a set number of bit sequences to be modulated from the M bit sequences to be modulated;

and for each bit sequence to be modulated in the set number of bit sequences to be modulated, the processing module performs an inversion operation on bits at set positions in each bit sequence to be modulated.

10. The sending device according to claim 8 or 9, wherein the processing module is configured to modulate each bit sequence to be modulated in the M bit sequences to be modulated respectively, and obtain the M modulation symbols, where the processing module is specifically configured to:

the processing module maps each bit sequence to be modulated to obtain a modulation symbol according to each bit sequence to be modulated and the mapping relation between the bit sequence and the modulation symbol;

the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be modulated, the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to one modulation symbol, and the number of bits included in the bit sequence is equal to the modulation order of the set modulation mode.

11. The transmission device of claim 7, wherein the processing module, when modulating the sequence of bits to be transmitted into M modulation symbols, is specifically configured to:

the processing module maps the bit sequence to be sent to obtain M modulation symbols according to the bit sequence to be sent and the mapping relation between the bit sequence and the modulation symbols;

the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be transmitted, the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to M modulation symbols, and the number of bits included in the bit sequence is equal to the modulation order of the set modulation mode.

12. The transmission apparatus according to any one of claims 7 to 11, wherein the set modulation scheme includes at least two modulation schemes among one modulation scheme or a plurality of modulation schemes having the same modulation order.