CN107769863A - A kind of modulator approach and device based on the multidirectional probability mapping of two-way - Google Patents

Abstract

An embodiment of the present invention provides a modulation method and device based on two-way multi-directional probability mapping. The method includes: performing serial-to-parallel conversion on the signal to be modulated to generate six sub-signals, performing probability mapping on four of the sub-signals to obtain a set of mapped signals, According to the first constellation diagram, determine the amplitude mapping results corresponding to the signal values at each moment of the first two mapping signals in the mapping signal set, and determine the following two mapping signals in the mapping signal set, according to the second constellation diagram. According to the position mapping results corresponding to the signal values of the two sub-signals except the four sub-signals at each moment in the six sub-signals, the APPM signal is obtained according to the amplitude mapping results and the position mapping results. In this embodiment, the signal to be modulated can be mapped into mapped signals with different probabilities, and then the APPM signal can be obtained according to the first constellation diagram and the second constellation diagram, without the need to design a complicated constellation diagram, and the complexity of signal modulation can be reduced.

Description

A modulation method and device based on two-way multi-directional probability mapping

technical field

The present invention relates to the technical field of signal modulation, in particular to a modulation method, device, electronic equipment and computer-readable storage medium based on two-way multi-directional probability mapping.

Background technique

With the large-scale popularization of the Internet industry and the continuous expansion of people's demand for information resources, in order to improve the transmission performance of the optical communication system, it is necessary to modulate the signal to be sent before the signal is sent. Usually, the signal to be modulated can be mapped to a coordinate system and expressed in the form of discrete points, these discrete points are called constellation points, and the coordinate system including these constellation points is called a constellation diagram.

APPM (Pulse Amplitude and Pulse Position Modulation, pulse amplitude and position modulation) is adopted in the prior art. APPM can map the amplitude and position of the signal to the constellation diagram respectively, and generate the APPM signal according to the amplitude mapping result and the position mapping result. In the existing signal modulation methods, since the signal to be modulated is usually a bit stream with equal probability, in order to reduce the transmission power when transmitting the signal, it is necessary to design a constellation diagram with unequal intervals, so as to realize that the constellation points in the constellation diagram reach the expected maximum good distribution. However, designing constellation diagrams with unequal intervals requires more complex algorithms, which in turn leads to higher complexity of signal modulation.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a modulation method, device, electronic equipment and computer-readable storage medium based on two-way multi-directional probability mapping, which can reduce the complexity of signal modulation. The specific technical scheme is as follows:

In the first aspect, an embodiment of the present invention provides a modulation method based on two-way multi-directional probability mapping, the method comprising:

Obtaining a signal to be modulated, performing serial-to-parallel conversion on the signal to be modulated to generate six parallel sub-signals;

respectively performing probability mapping on four of the six sub-signals according to preset mapping rules to obtain a mapped signal set including four mapped signals;

According to the first constellation diagram, determine the amplitude mapping result corresponding to the signal value at each moment of the first two mapping signals in the mapping signal set, wherein the first constellation diagram records the signal value and amplitude of the mapping signal Mapping relationship: according to the second constellation diagram, determine the positions corresponding to the signal values at each moment of the last two mapping signals in the mapping signal set and the two sub-signals of the six sub-signals except the four sub-signals The mapping result, wherein the second constellation diagram records the mapping relationship between the signal value and the position of the mapped signal;

Pulse amplitude and position modulation APPM is performed according to the amplitude mapping result and the position mapping result at each moment to obtain an APPM signal corresponding to the signal to be modulated.

Optionally, performing probability mapping on four of the six sub-signals according to a preset mapping rule to obtain a set of mapped signals including four mapped signals, including:

respectively performing first interleaving processing on four sub-signals among the six sub-signals to obtain an interleaved signal set including four interleaved signals;

respectively performing probability mapping on the four-way interleaving signals in the interleaving signal set according to preset mapping rules, to obtain a probability signal set including four-way probability signals;

Perform second interleaving processing on the four channels of probability signals in the probability signal set respectively to obtain a mapped signal set including four channels of mapped signals.

Optionally, the probabilistic mapping of the four-way interleaved signals in the interleaved signal set according to a preset mapping rule includes:

respectively performing first probability mapping on the first interleaved signal and the third interleaved signal in the set of interleaved signals;

Perform second probability mapping on the second path of interleaved signals and the fourth path of interleaved signals in the set of interleaved signals respectively.

Optionally, according to the second constellation diagram, determining the signal at each moment of the last two mapping signals in the mapping signal set and the two sub-signals of the six sub-signals except the four sub-signals The location mapping result corresponding to the value, including:

According to the second constellation diagram, determine the sub-constellation corresponding to the signal value at each moment of the last two mapping signals in the mapping signal set;

In the determined sub-constellation, according to the signal values at each moment of two sub-signals of the six sub-signals except the four sub-signals, the position mapping result at each time is determined.

Optionally, the first constellation diagram includes four signal amplitudes;

The second constellation diagram includes four sub-constellations, each of which includes four signal positions.

Optionally, the method also includes:

Obtain target APPM signal;

Demodulating the target APPM signal to obtain an amplitude mapping result and a position mapping result at each moment;

According to the first constellation diagram, obtain an amplitude signal set including two-way amplitude signals corresponding to the amplitude mapping result at this moment; according to the second constellation diagram, obtain a four-way position corresponding to the position mapping result at this moment signal set of position signals;

performing inverse probability mapping on the two amplitude signals in the amplitude signal set and the first two position signals in the position signal set respectively according to the mapping rules to obtain four demodulated sub-signals;

Parallel-serial conversion is performed on the obtained four demodulated sub-signals and the last two position signals in the position signal set to obtain a demodulated signal corresponding to the target APPM signal.

In the second aspect, an embodiment of the present invention provides a modulation device based on two-way multi-directional probability mapping, and the device includes:

A conversion module, configured to obtain a signal to be modulated, and perform serial-to-parallel conversion on the signal to be modulated to generate six parallel sub-signals;

A mapping module, configured to perform probability mapping on four of the six sub-signals according to preset mapping rules to obtain a set of mapped signals including four mapped signals;

The determination module is configured to determine the amplitude mapping results corresponding to the signal values at each moment of the first two mapping signals in the mapping signal set according to the first constellation diagram, wherein the first constellation diagram records the mapping signal The mapping relationship between the signal value and the amplitude; according to the second constellation diagram, determine the last two mapping signals in the mapping signal set, and the two sub-signals of the six sub-signals except the four sub-signals at each moment The position mapping result corresponding to the signal value, wherein the second constellation diagram records the mapping relationship between the signal value and the position of the mapped signal;

The modulation module is configured to perform pulse amplitude and position modulation APPM according to the amplitude mapping result and the position mapping result at each moment, so as to obtain an APPM signal corresponding to the signal to be modulated.

Optionally, the mapping module includes:

The first interleaving sub-module is configured to respectively perform first interleaving processing on four sub-signals among the six sub-signals to obtain an interleaved signal set including four interleaved signals;

The mapping sub-module is configured to perform probability mapping on the four interleaved signals in the interleaved signal set according to preset mapping rules to obtain a probability signal set including four probability signals;

The second interleaving sub-module is configured to respectively perform second interleaving processing on the four channels of probability signals in the probability signal set to obtain a mapped signal set including four channels of mapped signals.

Optionally, the mapping submodule is specifically configured to respectively perform first probability mapping on the first interleaved signal and the third interleaved signal in the interleaved signal set;

Perform second probability mapping on the second path of interleaved signals and the fourth path of interleaved signals in the set of interleaved signals respectively.

Optionally, the determining module is specifically configured to determine the sub-constellation corresponding to the signal value at each moment of the last two mapping signals in the mapping signal set according to the second constellation diagram;

In the determined sub-constellation, according to the signal values at each moment of two sub-signals of the six sub-signals except the four sub-signals, the position mapping result at each time is determined.

Optionally, the first constellation diagram includes four signal amplitudes;

The second constellation diagram includes four sub-constellations, each of which includes four signal positions.

Optionally, the device also includes:

A decoding module, configured to obtain a target APPM signal;

Demodulating the target APPM signal to obtain an amplitude mapping result and a position mapping result at each moment;

According to the first constellation diagram, obtain an amplitude signal set including two-way amplitude signals corresponding to the amplitude mapping result at this moment; according to the second constellation diagram, obtain a four-way position corresponding to the position mapping result at this moment signal set of position signals;

performing inverse probability mapping on the two amplitude signals in the amplitude signal set and the first two position signals in the position signal set respectively according to the mapping rules to obtain four demodulated sub-signals;

Parallel-serial conversion is performed on the obtained four demodulated sub-signals and the last two position signals in the position signal set to obtain a demodulated signal corresponding to the target APPM signal.

In the third aspect, the embodiment of the present invention also provides an electronic device, the electronic device includes: a processor, a communication interface, a memory, and a communication bus, wherein, the processor, the communication interface, and the memory complete mutual communication through the communication bus;

memory for storing computer programs;

The processor is configured to implement the steps of the modulation method based on the two-way multi-directional probability mapping provided by the embodiment of the present invention when executing the program stored in the memory.

In the fourth aspect, the embodiment of the present invention also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the computer program based on the present invention is implemented. Steps in the modulation method for a two-way multidirectional probability map.

Embodiments of the present invention provide a two-way multi-directional probability mapping-based modulation method, device, electronic equipment, and computer-readable storage medium. The above method includes: performing serial-to-parallel conversion on the signal to be modulated to generate six parallel sub-signals, respectively performing probability mapping on four of the six sub-signals according to preset mapping rules, to obtain a mapped signal set including four mapped signals , according to the first constellation diagram, determine the amplitude mapping results corresponding to the signal values of the first two mapping signals in the mapping signal set at each moment, and determine the latter two mapping signals in the mapping signal set according to the second constellation diagram 1. The position mapping results corresponding to the signal values of the two sub-signals of the six sub-signals except the four sub-signals at each moment, and perform APPM modulation according to the amplitude mapping results and position mapping results at each moment, and obtain the signal corresponding to the signal to be modulated APPM signal. Based on the preset mapping rules, the signal to be modulated can be mapped into mapped signals with different probabilities, and then the APPM signal can be obtained according to the first constellation diagram and the second constellation diagram, without the need to design complex constellation diagrams, which can reduce the complexity of signal modulation . Of course, implementing any product or method of the present invention does not necessarily need to achieve all the above-mentioned advantages at the same time.

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 flow chart of a modulation method based on two-way multi-directional probability mapping provided by an embodiment of the present invention;

FIG. 2 is a system block diagram based on two-way multi-directional probability map APPM modulation provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a first constellation diagram provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a second constellation diagram provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a communication system provided by an embodiment of the present invention;

FIG. 6 is a structural diagram of a modulation device based on two-way multi-directional probability mapping provided by an embodiment of the present invention;

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

Detailed ways

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.

The embodiment of the present invention discloses a modulation method, device, electronic equipment, and computer-readable storage medium based on two-way multi-directional probability mapping. The above method can be applied to a terminal that modulates a signal (hereinafter referred to as a terminal). Based on the preset mapping rules, the terminal can map the signal to be modulated into mapped signals with different probabilities, and then obtain APPM (Pulse Amplitude and Pulse Position Modulation, called pulse amplitude and position modulation) according to the first constellation diagram and the second constellation diagram. ) signal, there is no need to design a complex constellation diagram, which can reduce the complexity of signal modulation.

Referring to FIG. 1, FIG. 1 is a flow chart of a modulation method based on two-way multi-directional probability mapping provided by an embodiment of the present invention, including:

S101: Obtain a signal to be modulated, and perform serial-to-parallel conversion on the signal to be modulated to generate six channels of parallel sub-signals.

In an implementation manner, the signal to be modulated may be a binary bit stream (hereinafter referred to as the bit stream for short), and the signal to be modulated each time acquired by the terminal may be a frame of bit stream. Serial-to-parallel conversion refers to the process of converting a frame of continuous bit streams into parallel multiple bit streams representing the same information. The terminal can perform serial-to-parallel conversion on the signal to be modulated to obtain six parallel bit streams (ie, sub-signals). Wherein, the terminal can use the shift register to complete the serial-to-parallel conversion.

Specifically, refer to FIG. 2 . FIG. 2 is a system block diagram of APPM modulation based on two-way multi-directional probability mapping provided by an embodiment of the present invention. It can be seen that six channels of parallel bit streams are generated after serial-to-parallel conversion of one frame of bit stream. The terminal can convert the bit stream of each channel into a matrix form, where each matrix includes multiple vector units.

Therefore, the size S of a frame of bit stream processed by the terminal each time can be calculated by formula (1):

S＝K*L*4+N*L*2 (1)

Wherein, the terminal can convert each of the four bit streams into a K*L matrix, where K represents the number of bits contained in each vector unit in the matrix, and L represents the number of vector units in the matrix. The terminal can convert each of the other two bit streams into an N*L matrix, where N represents the number of bits contained in each vector unit in the matrix, and L represents the number of vector units in the matrix, where K<L .

S102: Probabilistically map the four sub-signals of the six sub-signals according to a preset mapping rule to obtain a mapped signal set including the four mapped signals.

In an implementation manner, the terminal may respectively perform probability mapping on four of the six sub-signals according to the same mapping rule, or may perform probability mapping on four of the six sub-signals according to different mapping rules. Wherein, probability mapping refers to mapping sub-signals with equal probability to mapped signals with unequal probability through preset mapping rules. Specifically, after probability mapping is performed on bit streams containing 0 and 1 with equal probabilities, the probabilities of 0 and 1 in the obtained mapped signal are not equal. The terminal may perform probability mapping on the four channels of sub-signals, so that the probability of 0 in each of the obtained mapped signals is greater than the probability of 1. Specifically, how the terminal performs probability mapping on the above four channels of sub-signals will be described in detail in the following embodiments.

Wherein, during the process of performing probability mapping on the four sub-signals, the terminal may also perform interleaving processing on the four sub-signals. Specifically, the terminal performs probability mapping on four sub-signals among the six sub-signals according to a preset mapping rule, and obtains a set of mapped signals including four mapped signals, which may include:

A1: Perform first interleaving processing on four sub-signals among the six sub-signals to obtain an interleaved signal set including four interleaved signals.

In one implementation manner, the terminal may firstly perform the first interleaving process on the above-mentioned four-way bit streams, so that the order of the bit values of the four-way bit streams is rearranged to obtain the four-way interleaved bit streams (that is, the four-way interleaved signals, respectively corresponding to m ₁ , m ₂ , m ₃ and m ₄ in Fig. 2). The first interleaving process is proposed for a channel with memory, and converts burst errors in the channel into random errors by spreading them in time, so as to improve the robustness of coding and reduce the bit error rate.

In practical applications, there are many ways to implement the first interleaving process, which may be regular interleaving, irregular interleaving, or random interleaving. The embodiment of the present invention does not limit a specific implementation manner of the first interleaving process.

In this embodiment, the terminal performs first interleaving processing on a certain bit stream as an example for illustration, and the process of performing first interleaving processing on other three bit streams is similar. Specifically, the process that the terminal performs the first interleaving process on the first bit stream may include: converting the first bit stream into a first matrix row by row, and each row element of the first matrix represents the preceding and following phases in the first bit stream adjacent bit values; each element in the first matrix is read column by column from beginning to end to obtain the first interleaved bit stream (that is, the first interleaved signal).

Exemplarily, the first bit stream may be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. First, the terminal can convert the first bit stream into the first matrix row by row, as shown in Table 1, each row element of the first matrix represents the adjacent bit values in the first bit stream, and then start from the beginning by column Each element in the first matrix is read at the end to obtain the first interleaved bit stream, that is, the first interleaved signal. You can get: 1, 4, 7, 10, 2, 5, 8, 11, 3, 6, 9, 12.

Table 1

1 2 3 4 5 6 7 8 9 10 11 12

It can be seen that this embodiment provides a simple and efficient first interleaving processing method, which can disperse the front and rear related bit values in the bit streams of each of the above four channels at fixed intervals, even in the signal transmission process In the case of unexpected situations, the errors will also be dispersed when decoding at the receiving end, thereby avoiding the situation that cannot be decoded, improving the robustness of the encoding, and reducing the bit error rate.

A2: Probabilistic mapping is performed on the four interleaved signals in the interleaved signal set according to preset mapping rules to obtain a probability signal set including four probabilistic signals.

In an implementation manner, the preset mapping rule may be preset by a technician for each interleaved signal. Wherein, the mapping rules of each channel may be the same or different.

Preferably, the terminal may respectively perform the first probability mapping on the first interleaved signal and the first interleaved signal in the interleaved signal set, and perform the second probability mapping on the second interleaved signal and the fourth interleaved signal in the interleaved signal set respectively. probability map.

In this embodiment, the terminal performs the first probability mapping on the first path of interleaved signals and performs the second probability mapping on the second path of interleaved signals as an example for description. For the method for the terminal to perform the first probability mapping on the third interleaved signal, refer to the method for the terminal to perform the first probability mapping on the first interleaved signal. For the method for the terminal to perform the second probability mapping on the fourth interleaved signal, refer to the method for the terminal to perform the first probability mapping on the first interleaved signal.

Exemplarily, the steps for the terminal to perform the first probability mapping on the first interleaved signal are as follows:

The terminal may use m _i1 and m _i2 to represent the first bit and the second bit before the first probability mapping in the ith vector unit of the first interleaved signal respectively. The terminal may use c _i1 , c _i2 , c _i3 , and c _i4 to respectively represent the first to fourth bits in the i-th vector unit after the first probability mapping. When there are multiple combinations of c _i1 , c _i2 , c _i3 , and c _i4 , for m _i1 and m _i2 , the terminal may randomly select a combination from the above multiple combinations with medium probability for mapping. Specifically, the mapping rules of the first probability mapping may be shown in Table 2:

Table 2

The step of the terminal performing the second probability mapping on the second interleaved signal is the same as the step of performing the first probability mapping on the first interleaved signal, except that the probability mapping rules are different. Specifically, the mapping rules of the second probability mapping may be as shown in Table 3:

table 3

It should be noted that the specific mapping rules adopted by the first probability mapping and the second probability mapping are not limited to the above two manners.

It can be seen that after the terminal performs the first probability mapping on the first interleaved signal, the probabilities of 0 and 1 are 73.2% and 26.8% respectively. After the terminal performs the second probability mapping on the second interleaved signal, the probabilities of 0 and 1 are 61.9% and 38.1%, respectively. The probability of c ₁ 'c ₂ ' after the combination of the two mapping signals is shown in Table 4:

Table 4

Corresponding to FIG. 2, it can be seen that the four mapping signals are c ₁ ′, c ₂ ′, c ₃ ′, and c ₄ ′, respectively. The minimum probability of occurrence of 11 in the first two mapping signals c ₁ 'c ₂ ' is 10.2%, and the minimum probability of occurrence of 00 is 45.3%. A signal with a signal value of 11 has high energy, and a signal with a signal value of 00 has low energy. Therefore, in the mapped signals obtained by the terminal, the probability of a signal with lower energy is higher than that of a signal with higher energy, which can reduce the average power of the signal.

Referring to Figure 2, the terminal can respectively perform probability mapping on the four interleaved signals in the interleaved signal set, and obtain probability signals containing four probability signals (corresponding to c ₁ , c ₂ , c ₃ and c ₄ in Figure 2 respectively) gather.

A3: Perform a second interleaving process on the four probability signals in the probability signal set respectively to obtain a mapped signal set including the four mapped signals.

In an implementation manner, an implementation manner of the second interleaving process may be the same as that of the foregoing first interleaving process, or may be different from that of the foregoing first interleaving process. Specifically, the method for the terminal to respectively perform the second interleaving processing on the four channels of probability signals in the probability signal set may refer to the above-mentioned step A1, which will not be repeated here.

In Figure 2, the terminal can respectively perform the second interleaving process on the four channels of probability signals in the probability signal set to obtain four channels of mapping signals (corresponding to c ₁ ′, c ₂ ′, c ₃ ′ and c ₄ ') mapping signal set.

It can be seen from the above that in the embodiment of the present invention, the terminal may design different mapping rules according to the APPM signal to be finally generated. Each channel can adopt customized mapping rules, which can realize the mapping signal of each channel according to the expected probability distribution, so as to better match the transmission channel and improve the signal transmission performance.

S103: According to the first constellation diagram, determine the amplitude mapping results corresponding to the signal values of the first two mapping signals in the mapping signal set at each moment; according to the second constellation diagram, determine the last two mapping signals in the mapping signal set . The position mapping results corresponding to the signal values at each moment of the two sub-signals except the four sub-signals among the six sub-signals.

In an implementation manner, the terminal may determine the amplitude mapping result (amplitude mapping in FIG. 2 ) corresponding to the signal value at each moment of the first two mapped signals in the mapped signal set according to the first constellation diagram. The terminal may determine, according to the second constellation diagram, the following two mapping signals in the mapping signal set, and the two sub-signals except the four sub-signals among the six sub-signals (hereinafter referred to as the fifth sub-signal and the sixth sub-signal respectively). The position mapping result corresponding to the signal value at each moment (the position mapping in Figure 2). Wherein, the first constellation diagram records the mapping relationship between the signal value and the amplitude of the mapped signal, and the second constellation diagram records the mapping relationship between the signal value and the position of the mapped signal.

Specifically, refer to FIG. 3 , which is a schematic diagram of a first constellation diagram provided by an embodiment of the present invention.

The mapping relationship between the signal value and the amplitude of the mapped signal in the first constellation diagram can be expressed by formula (2):

Wherein, Amp represents the amplitude mapped to the first constellation diagram, ₁ ′ represents the first mapped signal at a certain moment, and c ₂ ′ represents the second mapped signal at this moment. It can be seen that the first constellation diagram contains four signal amplitudes of 1, 2, 3, and 4, and c ₁ 'c ₂ ' has four values of 00, 01, 10, and 11. When the value of c ₁ ′c ₂ ′ is 00, the corresponding amplitude is 1; when the value of c ₁ ′c ₂ ′ is 01, the corresponding amplitude is 2; when the value of c ₁ ′c ₂ ′ is 10, the corresponding amplitude is 3 , when the value of c ₁ 'c ₂ ' is 11, the corresponding magnitude is 4.

The terminal may map the first two mapped signals in the set of mapped signals at each moment to one of the four amplitudes in the first constellation according to the mapping relationship between the signal value and the amplitude of the mapped signal in the first constellation, Get the amplitude mapping result at this moment.

Fig. 4 is a schematic diagram of a second constellation diagram provided by an embodiment of the present invention.

In an implementation manner, the second constellation diagram may include 4 sub-constellations, and each sub-constellation includes 4 signal positions. As shown in FIG. 4 , the 4 positions in each column in FIG. 4 may be a sub-constellation, or the 4 positions in each row may be a sub-constellation, and the sub-constellation may also be divided according to other allocation methods. The terminal may obtain the sub-constellation corresponding to the signal values at each moment of the last two mapped signals in the mapped signal set according to the second constellation diagram, and in the obtained sub-constellation, according to the fifth-channel sub-signal and the sixth-channel sub-signal The signal value at each moment, and the position mapping result at each moment is obtained.

Preferably, the correspondence between the last two mapped signals in the set of mapped signals in the second constellation diagram and the sub-constellation can be represented by formula (3):

Wherein, the terminal may divide the 4 positions in each column into a sub-constellation. Pos represents the position mapped to the second constellation diagram, c ₃ ′ represents the third mapped signal at a certain moment, and c ₄ ′ represents the fourth mapped signal at this moment. When c ₃ ′c ₄ ′=00, it corresponds to the first sub-constellation, where the first sub-constellation includes 4 positions of 0, 1, 2, and 3; when c ₃ ′c ₄ ′=01, it corresponds to the second sub-constellation , where the second sub-constellation includes 4, 5, 6, and 7 positions; when c ₃ ′c ₄ ′=10, it corresponds to the third sub-constellation, wherein the third sub-constellation includes 8, 9, 10, 11 There are 4 positions in total; when c ₃ ′c ₄ ′=11, it corresponds to the fourth sub-constellation, wherein the fourth sub-constellation includes 4 positions of 12, 12, 14, and 15. Specifically, after determining the sub-constellation, the terminal may determine a position among the 4 positions of each sub-constellation according to c ₅ ′c ₆ ′, as a position mapping result. Wherein, c ₅ ′ represents the fifth sub-signal at this time, and c ₆ ′ represents the sixth sub-signal at this time.

Since the terminal does not perform probability mapping on the fifth sub-signal and the sixth sub-signal, both the fifth sub-signal and the sixth sub-signal may be bit streams with equal probability. The terminal can determine a position among the 4 positions of each sub-constellation according to c ₅ ′c ₆ ′ according to a preset allocation manner. Specifically, an example of determining a position in the first sub-constellation is used for illustration, and the situation of determining a position in the other three sub-constellations is similar. The terminal can determine a position in the first sub-constellation according to formula (4):

Wherein, Pos1 represents a position in the first sub-constellation. It should be noted that the embodiment of the present invention only uses the formula (4) as an example for illustration, and in practical application, it is not limited to the terminal using the above formula to determine a position in the sub-constellation.

It can be seen from the above that, according to the method provided by the embodiment of the present invention, there is no need to design complex constellation diagrams with unequal intervals, and the terminal can directly obtain the APPM signal according to the first constellation diagram and the second constellation diagram, which reduces the complexity of signal modulation. the complexity.

S104: Perform pulse amplitude and position modulation APPM according to the amplitude mapping result and position mapping result at each moment, to obtain an APPM signal corresponding to the signal to be modulated.

In an implementation manner, the terminal may perform APPM (4*16 APPM modulation in FIG. 2 ) modulation according to the amplitude mapping result and the position mapping result at each moment to obtain an APPM signal corresponding to the signal to be modulated. For the amplitude mapping result and position mapping result at each moment, the terminal can generate an APPM signal including 16 positions. The terminal can determine a position with amplitude information among the 16 positions of the APPM signal according to the position mapping result at this time, and the amplitude of this position is the amplitude mapping result at this time.

Exemplarily, the terminal may determine that the amplitude mapping result of the signal to be modulated at a certain moment is 3, and the position mapping result is 10. At this time, the terminal may generate an APPM signal with an amplitude of 3 at the eleventh position.

In an embodiment of the present invention, a decoding method of an APPM signal is also provided. Specifically, the processing steps include:

Obtain the target APPM signal, demodulate the target APPM signal, and obtain the amplitude mapping result and position mapping result at each moment. According to the first constellation diagram, a set of amplitude signals including two-way amplitude signals corresponding to the amplitude mapping result at this moment is obtained; according to the second constellation diagram, a position signal including four-way position signals corresponding to the position mapping result at this moment is obtained gather. According to the mapping rules, inverse probability mapping is performed on the two amplitude signals in the amplitude signal set and the first two position signals in the position signal set to obtain four demodulated signals. Parallel-serial conversion is performed on the obtained four demodulated signals and the last two position signals in the position signal set to obtain demodulated signals corresponding to the target APPM signal.

In an implementation manner, the terminal may demodulate the acquired APPM signal to obtain amplitude information and position information corresponding to the APPM signal at each moment. Since the amplitude of the received APPM signal is an analog value, and usually the received signal will be interfered, the terminal can obtain the position information according to the position with the largest amplitude among the 16 positions in the APPM signal at this moment, and then according to the formula (5 ) to obtain the amplitude information of the position, and complete the confirmation of the APPM amplitude information and position information.

Wherein, amp1 represents the largest amplitude among the amplitudes of 16 positions in the APPM signal received by the terminal. According to the different ranges of the value of amp1, the terminal can determine that the APPM signal corresponds to Amp in the first constellation diagram, and then can determine the preceding Amp representing the amplitude information based on the mapping relationship of formula (2) according to the determined Amp. Two bit streams.

Then, the terminal can determine the third and fourth bit streams according to the determined position of amp1 according to the formula (3), and then can use the preset allocation used in the above step of determining a position in the sub-constellation way to determine the fifth bit stream and the sixth bit stream. The terminal can sort the determined six channels of parallel bit streams into one channel in the order from the first channel to the sixth channel, perform parallel-to-serial conversion, and output one channel of serial bit stream data, thus completing the decoding.

As shown in FIG. 5 , it is a schematic diagram of a communication system provided by an embodiment of the present invention. The embodiment of the present invention can be applied to the transmitting end in the communication system. The transmitting end first performs serial-to-parallel conversion on one binary bit stream to obtain six parallel bit streams, and then processes the six parallel bit streams with probabilistic shaping encoding and 4* 16APPM modulation to obtain an APPM signal, and then, the APPM signal is sent to the receiving end via an optical fiber link. Among them, the optical attenuator is used to change the optical power.

At the receiving end in the communication system, firstly, use the pre-amplifier to adjust the optical power, and use the optical band-pass filter to filter out the effective bandwidth from the spectrum broadened by the noise, and then use the low-pass filter to filter out the baseband in the effective bandwidth Noise, the detected data signal is sent to the decoding circuit for decoding, wherein the decoding process is the inverse process of the encoding process, mainly composed of probabilistic shaping decoding and 4*16APPM demodulation unit, and finally, the decoded data signal is Parallel to serial conversion to obtain a binary bit stream.

FIG. 6 is a structural diagram of a modulation device based on two-way multi-directional probability mapping provided by an embodiment of the present invention, including:

A conversion module 601, configured to obtain a signal to be modulated, and perform serial-to-parallel conversion on the signal to be modulated to generate six parallel sub-signals;

The mapping module 602 is configured to perform probability mapping on four sub-signals among the six sub-signals according to a preset mapping rule to obtain a mapped signal set including four mapped signals;

The determination module 603 is configured to determine the amplitude mapping results corresponding to the signal values at each moment of the first two mapping signals in the mapping signal set according to the first constellation diagram, wherein the first constellation diagram records the mapping signals The mapping relationship between the signal value and the amplitude; according to the second constellation diagram, determine each moment of the last two mapping signals in the mapping signal set and the two sub-signals in the six sub-signals except the four sub-signals The position mapping result corresponding to the signal value of the signal value, wherein the second constellation diagram records the mapping relationship between the signal value of the mapped signal and the position;

The modulation module 604 is configured to perform pulse amplitude and position modulation APPM according to the amplitude mapping result and position mapping result at each moment, to obtain an APPM signal corresponding to the signal to be modulated.

In the embodiment of the present invention, the mapping module 602 includes:

The first interleaving sub-module is configured to respectively perform first interleaving processing on four sub-signals among the six sub-signals to obtain an interleaved signal set including four interleaved signals;

The mapping sub-module is configured to perform probability mapping on the four interleaved signals in the interleaved signal set according to preset mapping rules to obtain a probability signal set including four probability signals;

The second interleaving sub-module is configured to respectively perform second interleaving processing on the four channels of probability signals in the probability signal set to obtain a mapped signal set including four channels of mapped signals.

In the embodiment of the present invention, the mapping submodule is specifically configured to respectively perform first probability mapping on the first interleaved signal and the third interleaved signal in the interleaved signal set;

Perform second probability mapping on the second path of interleaved signals and the fourth path of interleaved signals in the set of interleaved signals respectively.

In the embodiment of the present invention, the determination module 603 is specifically configured to determine the sub-constellation corresponding to the signal value at each moment of the last two mapping signals in the mapping signal set according to the second constellation diagram;

In the determined sub-constellation, according to the signal values at each moment of two sub-signals of the six sub-signals except the four sub-signals, the position mapping result at each time is determined.

In the embodiment of the present invention, the first constellation diagram includes four signal amplitudes;

The second constellation diagram includes four sub-constellations, each of which includes four signal positions.

In an embodiment of the present invention, the device further includes:

A decoding module, configured to obtain a target APPM signal;

Demodulating the target APPM signal to obtain an amplitude mapping result and a position mapping result at each moment;

According to the first constellation diagram, obtain an amplitude signal set including two-way amplitude signals corresponding to the amplitude mapping result at this moment; according to the second constellation diagram, obtain a four-way position corresponding to the position mapping result at this moment signal set of position signals;

performing inverse probability mapping on the two amplitude signals in the amplitude signal set and the first two position signals in the position signal set respectively according to the mapping rules to obtain four demodulated sub-signals;

Parallel-serial conversion is performed on the obtained four demodulated sub-signals and the last two position signals in the position signal set to obtain a demodulated signal corresponding to the target APPM signal.

The embodiment of the present invention also provides an electronic device, as shown in FIG. complete the mutual communication,

Memory 703, used to store computer programs;

When the processor 701 is used to execute the program stored on the memory 703, the following steps are implemented:

Obtaining a signal to be modulated, performing serial-to-parallel conversion on the signal to be modulated to generate six parallel sub-signals;

respectively performing probability mapping on four of the six sub-signals according to preset mapping rules to obtain a mapped signal set including four mapped signals;

According to the first constellation diagram, determine the amplitude mapping result corresponding to the signal value at each moment of the first two mapping signals in the mapping signal set, wherein the first constellation diagram records the signal value and amplitude of the mapping signal Mapping relationship: according to the second constellation diagram, determine the positions corresponding to the signal values at each moment of the last two mapping signals in the mapping signal set and the two sub-signals of the six sub-signals except the four sub-signals The mapping result, wherein the second constellation diagram records the mapping relationship between the signal value and the position of the mapped signal;

Pulse amplitude and position modulation APPM is performed according to the amplitude mapping result and the position mapping result at each moment to obtain an APPM signal corresponding to the signal to be modulated.

The communication bus 704 mentioned above for the electronic device may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (Extended Industry Standard Architecture, EISA) bus or the like. The communication bus 704 can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

The communication interface 702 is used for communication between the above-mentioned electronic devices and other devices.

The memory 703 may include a random access memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-Volatile Memory, NVM), such as at least one disk memory. Optionally, the memory 703 may also be at least one storage device located away from the aforementioned processor.

The above-mentioned processor 701 can be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; it can also be a digital signal processor (DigitalSignal Processing, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

The electronic device provided by the embodiment of the present invention can map the signal to be modulated into a mapping signal with different probabilities based on the preset mapping rule, and then obtain the APPM signal according to the first constellation diagram and the second constellation diagram, without the need to design complex The constellation diagram can reduce the complexity of signal modulation.

The embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores instructions, and when it is run on a computer, the computer executes the two-way multi-directional probability mapping based on the embodiment of the present invention. modulation method.

Specifically, the above-mentioned modulation method based on two-way multi-directional probability mapping includes:

Obtaining a signal to be modulated, performing serial-to-parallel conversion on the signal to be modulated to generate six parallel sub-signals;

respectively performing probability mapping on four of the six sub-signals according to preset mapping rules to obtain a mapped signal set including four mapped signals;

According to the first constellation diagram, determine the amplitude mapping result corresponding to the signal value at each moment of the first two mapping signals in the mapping signal set, wherein the first constellation diagram records the signal value and amplitude of the mapping signal Mapping relationship: according to the second constellation diagram, determine the positions corresponding to the signal values at each moment of the last two mapping signals in the mapping signal set and the two sub-signals of the six sub-signals except the four sub-signals The mapping result, wherein the second constellation diagram records the mapping relationship between the signal value and the position of the mapped signal;

Pulse amplitude and position modulation APPM is performed according to the amplitude mapping result and the position mapping result at each moment to obtain an APPM signal corresponding to the signal to be modulated.

It should be noted that other implementation manners of the modulation method based on the two-way multi-directional probability mapping are the same as those in the foregoing method embodiments, and will not be repeated here.

By running the instructions stored in the computer-readable storage medium provided by the embodiment of the present invention, the signal to be modulated can be mapped into a mapping signal with different probabilities based on the preset mapping rule, and then according to the first constellation diagram and the second constellation diagram To obtain the APPM signal, there is no need to design a complex constellation diagram, which can reduce the complexity of signal modulation.

The embodiment of the present invention also provides a computer program product containing instructions, which, when run on a computer, causes the computer to execute the modulation method based on the two-way multi-directional probability mapping provided by the embodiment of the present invention.

Specifically, the above-mentioned modulation method based on two-way multi-directional probability mapping includes:

Obtaining a signal to be modulated, performing serial-to-parallel conversion on the signal to be modulated to generate six parallel sub-signals;

respectively performing probability mapping on four of the six sub-signals according to preset mapping rules to obtain a mapped signal set including four mapped signals;

According to the first constellation diagram, determine the amplitude mapping result corresponding to the signal value at each moment of the first two mapping signals in the mapping signal set, wherein the first constellation diagram records the signal value and amplitude of the mapping signal Mapping relationship: according to the second constellation diagram, determine the positions corresponding to the signal values at each moment of the last two mapping signals in the mapping signal set and the two sub-signals of the six sub-signals except the four sub-signals The mapping result, wherein the second constellation diagram records the mapping relationship between the signal value and the position of the mapped signal;

Pulse amplitude and position modulation APPM is performed according to the amplitude mapping result and the position mapping result at each moment to obtain an APPM signal corresponding to the signal to be modulated.

It should be noted that other implementation manners of the modulation method based on the two-way multi-directional probability mapping are the same as those in the foregoing method embodiments, and will not be repeated here.

By running the computer program product provided by the embodiment of the present invention, the signal to be modulated can be mapped to a mapped signal with different probabilities based on a preset mapping rule, and then the APPM signal can be obtained according to the first constellation diagram and the second constellation diagram. Designing complex constellation diagrams can reduce the complexity of signal modulation.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present invention will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, a Solid State Disk (SSD)).

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Each embodiment in this specification is described in a related manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the apparatus, electronic equipment, computer-readable storage medium, and computer program product embodiments, since they are basically similar to the method embodiments, the description is relatively simple. For relevant parts, please refer to the part of the description of the method embodiments.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (10)

1. a kind of modulator approach based on the multidirectional probability mapping of two-way, it is characterised in that methods described includes：

Signal to be modulated is obtained, carrying out serioparallel exchange to the signal to be modulated generates the parallel subsignal in six tunnels；

Probability mapping is carried out to four way signals in subsignal described in six tunnels according to default mapping ruler respectively, comprising The mapping signal set of four road mapping signals；

According to the first planisphere, the signal value pair at each moment of preceding two-way mapping signal in the mapping signal set is determined The magnitude map result answered, wherein, first planisphere have recorded the signal value of mapping signal and the mapping relations of amplitude；Root According to the second planisphere, determine the rear two-way mapping signal in the mapping signal set, remove described four in subsignal described in six tunnels Position mapping result corresponding to the signal value at each moment of the two-way subsignal beyond way signal, wherein, second star Seat figure have recorded the signal value of mapping signal and the mapping relations of position；

Impulse amplitude and position modulation APPM are carried out according to the magnitude map result at each moment and position mapping result, obtain with APPM signals corresponding to the signal to be modulated.

2. according to the method for claim 1, it is characterised in that it is described according to default mapping ruler respectively to described in six tunnels Four way signals in subsignal carry out probability mapping, obtain including the mapping signal set of four road mapping signals, including：

The first interleaving treatment is carried out to four way signals in subsignal described in six tunnels respectively, obtained comprising four road interleaved signals Interleaved signal set；

Probability mapping is carried out to the road interleaved signals of interleaved signal set Zhong tetra- respectively according to default mapping ruler, obtained Include the probability signal set of four road probability signals；

The second interleaving treatment is carried out to the road probability signals of probability signal set Zhong tetra- respectively, obtained comprising four tunnels mapping letter Number mapping signal set.

3. according to the method for claim 2, it is characterised in that it is described according to default mapping ruler respectively to the intertexture The road interleaved signals of signal set Zhong tetra- carry out probability mapping, including：

The first probability mapping is carried out to the first via interleaved signal in the interleaved signal set and the 3rd road interleaved signal respectively；

The second probability mapping is carried out to the second road interleaved signal in the interleaved signal set and the 4th road interleaved signal respectively.

4. according to the method for claim 1, it is characterised in that it is described according to the second planisphere, it is determined that believing with the mapping Rear two-way mapping signal in number set, two-way subsignal in subsignal described in six tunnels in addition to the four ways signal it is every Position mapping result corresponding to the signal value at one moment, including：

According to the second planisphere, it is determined that the signal value with each moment of the rear two-way mapping signal in the mapping signal set Corresponding component seat；

It is determined that component seat in, according to the every of the two-way subsignal in subsignal described in six tunnels in addition to the four ways signal The signal value at one moment, determine the position mapping result at each moment.

5. according to the method for claim 4, it is characterised in that four signal amplitudes are included in first planisphere；

Second planisphere includes four sub- constellations, and each component seat includes four signal locations.

6. according to the method for claim 1, it is characterised in that methods described also includes：

Obtain target APPM signals；

The target APPM signals are demodulated, obtain the magnitude map result and position mapping result at each moment；

According to first planisphere, the amplitude for including two-way range signal corresponding with the magnitude map result at the moment is obtained Signal set；According to second planisphere, acquisition is corresponding with the position mapping result at the moment to include four road position signallings Position signalling set；

According to the mapping ruler respectively to the two-way range signal in the range signal set and the position signalling set In preceding two-way position signalling carry out inverse probability mapping, obtain four tunnels solution sub-signals；

Parallel-serial conversion is carried out to the rear two-way position signalling in obtained four tunnels solution sub-signals and the position signalling set, obtained To demodulated signal corresponding with the target APPM signals.

7. a kind of modulating device based on the multidirectional probability mapping of two-way, it is characterised in that described device includes：

Modular converter, for obtaining signal to be modulated, serioparallel exchange is carried out to the signal to be modulated and generates the parallel son in six tunnels Signal；

Mapping block, for carrying out probability to four way signals in subsignal described in six tunnels respectively according to default mapping ruler Mapping, obtains including the mapping signal set of four road mapping signals；

Determining module, for according to the first planisphere, determining each of the preceding two-way mapping signal in the mapping signal set Magnitude map result corresponding to the signal value at moment, wherein, first planisphere have recorded the signal value and width of mapping signal The mapping relations of degree；According to the second planisphere, rear two-way mapping signal in the mapping signal set, son described in six tunnels are determined Position mapping result corresponding to the signal value at each moment of the two-way subsignal in signal in addition to the four ways signal, its In, second planisphere have recorded the signal value of mapping signal and the mapping relations of position；

Modulation module, carry out impulse amplitude for the magnitude map result according to each moment and position mapping result and position is adjusted APPM processed, obtain APPM signals corresponding with the signal to be modulated.

8. device according to claim 7, it is characterised in that the mapping block, including：

First intertexture submodule, for carrying out the first interleaving treatment to four way signals in subsignal described in six tunnels respectively, obtain To the interleaved signal set for including four road interleaved signals；

Mapping submodule, for being entered respectively to the road interleaved signals of interleaved signal set Zhong tetra- according to default mapping ruler Row probability maps, and obtains including the probability signal set of four road probability signals；

Second intertexture submodule, for being carried out respectively to the road probability signals of probability signal set Zhong tetra- at the second intertexture Reason, obtains including the mapping signal set of four road mapping signals.

9. a kind of electronic equipment, it is characterised in that including processor, communication interface, memory and communication bus, wherein, it is described Processor, the communication interface, the memory complete mutual communication by the communication bus；

The memory, for depositing computer program；

The processor, during for performing the program deposited on the memory, realize any described sides of claim 1-6 Method step.

10. a kind of computer-readable recording medium, it is characterised in that the computer-readable recording medium internal memory contains computer Program, the computer program realize claim 1-6 any described method and steps when being executed by processor.