Signal anti-interference method and device based on high-order modulation unequal error protection

Abstract

The invention provides a signal anti-interference method and device based on high-order modulation unequal error protection, and relates to the technical field of digital signal processing, and the method comprises the steps: obtaining a quadrature amplitude modulation symbol based on an original signal in an anti-interference communication system; performing uniform mapping on the quadrature amplitude modulation symbol to obtain a frequency hopping signal; obtaining a to-be-demodulated signal based on the frequency hopping signal; and determining the bit error rate of the communication system based on the to-be-demodulated signal. According to the signal anti-interference method based on high-order modulation unequal error protection provided by the invention, approximate uniform distribution of interference energy is realized through a bit interleaving coded modulation structure, effective interference suppression is carried out on the basis of guaranteeing spectrum efficiency, the robustness of a communication system in a strong interference scene is improved, and the signal anti-interference performance is improved. Therefore, the anti-interference performance of the communication system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of digital signal processing, and in particular to a signal anti-interference method and device based on high-order modulation unequal error protection. BACKGROUND

[0002] In a complex electromagnetic environment, a communication system (such as a UAV communication system) needs to meet the dual requirements of strong anti-interference capability and high spectral efficiency.

[0003] Traditional anti-interference technologies (such as spread spectrum and frequency hopping) rely on processing gain to suppress interference, but lack coding gain. Although low code rate coding can provide coding gain, it needs to sacrifice spectral efficiency, and cannot effectively suppress interference while ensuring spectral efficiency, resulting in poor anti-interference performance of the communication system. SUMMARY

[0004] The present application provides a signal anti-interference method and device based on high-order modulation unequal error protection, to solve the technical problem that the prior art cannot effectively suppress interference while ensuring spectral efficiency, resulting in poor anti-interference performance of the communication system.

[0005] The present application provides a signal anti-interference method based on high-order modulation unequal error protection, comprising the following steps: Obtaining an original signal in a communication system; Based on the original signal, obtaining a quadrature amplitude modulation symbol; Uniformly mapping the quadrature amplitude modulation symbol to obtain a frequency hopping signal; Based on the frequency hopping signal, obtaining a to-be-demodulated signal; Based on the to-be-demodulated signal, determining the bit error rate of the communication system.

[0006] According to the signal anti-interference method based on high-order modulation unequal error protection provided by the present application, the quadrature amplitude modulation symbol is obtained based on the original signal, which comprises: TH encoding the original signal to obtain a low code rate TH code word; High-order M-QAM mapping the TH code word to obtain the quadrature amplitude modulation symbol.

[0007] According to the signal anti-interference method based on high-order modulation unequal error protection provided by the present application, the frequency hopping signal is obtained by uniformly mapping the quadrature amplitude modulation symbol, which comprises: Uniformly mapping the quadrature amplitude modulation symbol to each frequency hopping frequency point of a frequency hopping system to obtain a mapping signal; Frequency hopping processing the mapping signal to obtain the frequency hopping signal.

[0008] According to the present invention, a signal anti-interference method based on high-order modulation inequality error protection is provided, wherein obtaining the demodulated signal based on the frequency hopping signal includes: Interference detection is performed on the frequency hopping signal to determine the location of interference in the frequency hopping signal; The signal at the interference location is zeroed out to obtain a zeroed signal; The zero-set signal is de-jugated to obtain the original baseband signal; The original baseband signal is de-interleaved to obtain the signal to be demodulated.

[0009] According to the present invention, a signal anti-interference method based on high-order modulation inequality error protection is provided, wherein the step of detecting interference in the frequency hopping signal and determining the location of interference in the frequency hopping signal includes: The frequency hopping signal is interfered with to obtain the signal amplitude of each frequency band of the interfered frequency hopping signal; The frequency band location corresponding to the signal amplitude exceeding a preset threshold is defined as the interference location.

[0010] According to the present invention, a signal anti-interference method based on high-order modulation inequality error protection is provided, wherein determining the bit error rate of the communication system based on the demodulated signal includes: The signal to be demodulated is subjected to soft demodulation to obtain soft information corresponding to the signal to be demodulated. The soft information is weighted to obtain weighted soft information; The weighted soft information is decoded to obtain the decoding result; Based on the decoding result and the original signal, the bit error rate of the communication system is determined.

[0011] The present invention also provides a signal anti-interference device based on high-order modulation inequality error protection, comprising the following modules: The acquisition module is used to acquire the raw signals in the communication system; A modulation module is used to obtain quadrature amplitude modulation symbols based on the original signal; The mapping module is used to uniformly map the orthogonal amplitude modulation symbols to obtain a frequency hopping signal; An observation module is used to obtain the demodulated signal based on the frequency hopping signal; The determination module is used to determine the bit error rate of the communication system based on the signal to be demodulated.

[0012] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the signal anti-interference method based on higher-order modulation inequality error protection as described above.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the signal anti-interference method based on high-order modulation inequality error protection as described above.

[0014] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the signal anti-interference method based on higher-order modulation inequality error protection as described above.

[0015] The present invention provides a signal anti-interference method and apparatus based on high-order modulation inequality error protection. Based on the original signal in the anti-interference communication system, orthogonal amplitude modulation symbols are obtained. These symbols are uniformly mapped to obtain frequency-hopping signals. Then, through symbol-level full-band mapping, the same-source orthogonal amplitude modulation symbols are uniformly mapped to each hop, and frequency-hopping processing is performed to obtain frequency-hopping signals. Based on the frequency-hopping signals, a demodulated signal is obtained. Based on the demodulated signal, the bit error rate of the communication system is determined. The demodulated signal is then obtained through the frequency-hopping signal and used as the input of the orthogonal amplitude modulator / demodulator for soft demodulation, thereby determining the bit error rate of the communication system. This effectively suppresses interference while ensuring spectral efficiency, improving the anti-interference performance of the communication system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is one of the flowcharts illustrating the signal anti-interference method based on high-order modulation inequality error protection provided by the present invention.

[0018] Figure 2 This is the second flowchart of the signal anti-interference method based on high-order modulation inequality error protection provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the bit error rate curve provided by the present invention when the interference bandwidth accounts for 40% of the signal bandwidth.

[0020] Figure 4This is a schematic diagram of the bit error rate curve provided by the present invention when the interference bandwidth accounts for 50% of the signal bandwidth.

[0021] Figure 5 This is a schematic diagram of the bit error rate curve provided by the present invention when the interference bandwidth accounts for 60% of the signal bandwidth.

[0022] Figure 6 This is a schematic diagram of a signal anti-interference device based on high-order modulation inequality error protection provided by the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] In complex electromagnetic environments, communication systems must simultaneously meet the dual requirements of strong anti-interference capability and high spectral efficiency. Traditional anti-interference techniques, such as frequency hopping spread spectrum and direct sequence spread spectrum, rely on processing gain to suppress interference, but their inherent defects lead to a mutually exclusive contradiction between spectral efficiency and anti-interference capability. For example, frequency hopping technology is limited by the length of the frequency hopping sequence and the frequency switching rate, making it difficult to improve anti-interference capability while maintaining high spectral efficiency; direct sequence spread spectrum, on the other hand, suffers a significant reduction in spectral efficiency due to signal bandwidth expansion. Even if a low code rate channel coding combined with a binary phase shift keying (BPSK) modulation scheme is used to enhance anti-interference performance, its spectral efficiency will plummet, making it difficult to meet the requirement of high spectral efficiency.

[0026] In the field of coding and modulation, bit-interleaved coding and modulation techniques improve transmission reliability in fading channels through the joint design of interleaving and modulation. However, their spectral efficiency optimization mechanisms in anti-interference scenarios still have significant limitations. While existing research attempts to utilize the bit-level unequal error protection (UEP) characteristics of higher-order modulation, most solutions are limited to static bit allocation strategies at the transmitter, failing to form a closed-loop optimization with receiver signal processing. For example, in hexadecimal Quadrature Amplitude Modulation (QAM), different bits naturally possess differentiated anti-interference capabilities. Traditional schemes only map high-priority data to the more protected bits without weighting the soft information of the demodulated output, resulting in the UEP potential not being fully exploited. Furthermore, while hierarchical coding-based UEP schemes can achieve priority protection, they sacrifice spectral efficiency; non-uniform constellation designs, while avoiding efficiency losses, lead to a surge in system implementation complexity due to complex constellation mapping rules.

[0027] In summary, traditional anti-jamming techniques (such as spread spectrum and frequency hopping) rely on processing gain but lack coding gain, while low-code-rate coding, although providing coding gain, comes at the cost of sacrificing spectral efficiency. In scenarios such as UAV communication, where spectral efficiency and anti-jamming capabilities are critically demanding, existing technologies remain trapped in a trade-off between "strong anti-jamming capability and high spectral efficiency."

[0028] To this end, the present invention provides a signal anti-interference method based on high-order modulation inequality error protection, constructs a new technical framework that integrates coding modulation and anti-interference processing, and achieves synergistic improvement of interference suppression and spectral efficiency by introducing a soft information weighting algorithm based on UEP characteristics at the receiving end. On the basis of ensuring high spectral efficiency, effective interference suppression is carried out, thereby improving the anti-interference performance of the communication system.

[0029] The following is combined Figures 1 to 7 This invention describes a signal anti-interference method and apparatus based on high-order modulation inequality error protection.

[0030] Figure 1 This is one of the flowcharts illustrating the signal anti-interference method based on high-order modulation inequality error protection provided by the present invention, such as... Figure 1 As shown, the method includes the following steps: Step 101: Obtain the raw signals from the communication system.

[0031] Specifically, acquiring raw signals from communication systems such as satellite communication or drone communication, for example, acquiring raw signals of length N, can be mathematically expressed as:

[0032] Step 102: Based on the original signal, obtain the quadrature amplitude modulation symbol.

[0033] Optionally, obtaining the quadrature amplitude modulation symbol based on the original signal includes: The original signal is TH encoded to obtain a low-rate TH codeword; The TH codeword is mapped to a higher-order M-QAM to obtain the quadrature amplitude modulation symbol.

[0034] Specifically, Figure 2 This is the second flowchart of the signal anti-interference method based on high-order modulation inequality error protection provided by the present invention, as shown below. Figure 2 As shown, Turbo-Hadamard (TH) encoding of the original signal yields low-rate TH codewords; mapping the TH codewords to high-order M-ary Quadrature Amplitude Modulation (M-QAM) yields QAM symbols.

[0035] Taking a raw signal of length N as an example, the raw signal is processed with a code rate of... The TH encoding has a code length of 1. The low-rate encoded TH codeword obtained after TH encoding. The mathematical expression is:

[0036] Grouping and interleaving the TH codewords yields... dimensional matrix :

[0037] For matrix Perform a higher-order M-QAM mapping on each column vector, and denote the higher-order modulation order. The QAM symbols obtained after mapping It can be represented as:

[0038] Step 103: Perform uniform mapping on the orthogonal amplitude modulation symbols to obtain a frequency hopping signal.

[0039] Optionally, the step of uniformly mapping the orthogonal amplitude modulation symbols to obtain the frequency hopping signal includes: The orthogonal amplitude modulation symbols are uniformly mapped onto each frequency hopping point of the frequency hopping system to obtain the mapped signal; The mapped signal is subjected to frequency hopping processing to obtain the frequency hopping signal.

[0040] Specifically, QAM symbols are uniformly mapped onto each frequency hopping point of the frequency hopping system to obtain the mapped signal; the mapped signal is then subjected to frequency hopping processing to obtain the frequency hopping signal. The symbol-level full-band mapping is achieved through an interleaver π, uniformly mapping QAM symbols onto... After reaching each frequency hopping point, the resulting mapped signal can be expressed as:

[0041] Mapped signal This is the input signal for the subsequent frequency hopping module. By performing frequency hopping processing, the frequency hopping signal can be obtained.

[0042] QAM symbols are uniformly mapped to the frequency hopping system through symbol-level full-band mapping. At each frequency hopping point, interference is fully dispersed at the receiving end to avoid superimposed interference of QAM symbols, thereby improving the subsequent demodulation and decoding performance.

[0043] This invention employs a deeply coupled architecture of low-rate TH code and high-order QAM modulation. By constructing a joint coding and modulation system of low-rate TH code and high-order QAM, it achieves synergistic optimization of anti-interference performance and spectral efficiency. Compared to traditional schemes combining medium-to-high code-rate coding with low-order modulation (such as BPSK), the low-rate TH code of this invention significantly enhances anti-interference capability through its high coding gain, while the multi-symbol mapping characteristics of high-order QAM modulation ensure high spectral efficiency, effectively resolving the mutually exclusive contradiction between anti-interference capability and spectral efficiency.

[0044] Step 104: Based on the frequency hopping signal, obtain the signal to be demodulated.

[0045] Optionally, obtaining the demodulated signal based on the frequency hopping signal includes: Interference detection is performed on the frequency hopping signal to determine the location of interference in the frequency hopping signal; The signal at the interference location is zeroed out to obtain a zeroed signal; The zero-set signal is de-jugated to obtain the original baseband signal; The original baseband signal is de-interleaved to obtain the signal to be demodulated.

[0046] Optionally, the step of performing interference detection on the frequency hopping signal and determining the location of interference in the frequency hopping signal includes: The frequency hopping signal is interfered with to obtain the signal amplitude of each frequency band of the interfered frequency hopping signal; The frequency band location corresponding to the signal amplitude exceeding a preset threshold is defined as the interference location.

[0047] Specifically, firstly, the frequency hopping signal is sent to a partial frequency band interference channel, and interference detection is performed on the frequency hopping signal. Based on the characteristics of the interference signal, it is determined whether there is interference and the location of the interference. For partial frequency band interference, in the frequency domain, it is manifested as the received signal amplitude in some frequency bands exceeding the preset interference judgment threshold (i.e., preset threshold). When the signal amplitude exceeds the preset threshold, the corresponding frequency band location is determined to be the interference location. Then, the interference position is zeroed to obtain the signal after zeroing (i.e., the zeroed signal). Then, the zero-set signal is de-jugated to obtain the original baseband signal; Finally, the original baseband signal is de-interleaved to obtain the signal to be demodulated, which serves as the input signal for the subsequent QAM demodulator.

[0048] This invention, through the transmission of frequency-hopping signals to a partial frequency band interference channel, performs interference detection at the receiving end, and sets the disturbed bits (i.e., interference positions) to zero. By removing interference from the received signal, the impact of interference on the subsequent demodulation and decoding performance of the receiver is reduced. Furthermore, by de-hopping the zeroed signal and de-interleaving it, the signal to be demodulated is obtained and used as the input signal for the subsequent QAM demodulator, thereby improving the subsequent demodulation and decoding performance.

[0049] Step 105: Determine the bit error rate of the communication system based on the signal to be demodulated.

[0050] Optionally, determining the bit error rate of the communication system based on the signal to be demodulated includes: The signal to be demodulated is subjected to soft demodulation to obtain soft information corresponding to the signal to be demodulated. The soft information is weighted to obtain weighted soft information; The weighted soft information is decoded to obtain the decoding result; Based on the decoding result and the original signal, the bit error rate of the communication system is determined.

[0051] Specifically, the QAM demodulator performs soft demodulation on the signal to be demodulated, obtaining soft information corresponding to each higher-order modulated signal. The QAM demodulator operates in soft-input, soft-output mode. Based on the maximum likelihood ratio (LLR) algorithm, the demodulator's soft output is:

[0052] In the formula, Represents probability. The signal to be demodulated. For the corresponding symbols bits in This refers to the soft information of that bit output by the demodulator; Then, for soft information Weighted soft information is obtained by performing weighted processing. Soft information is weighted according to the mapped constellation diagram, and the soft information output of the soft demodulation is adjusted according to the protection level of different bits of the higher-order modulation. Assign weights For high protection level The obtained weighted soft information It can be represented as:

[0053] Then, the weighted soft information Perform decoding to obtain the decoding result; Weighted soft information The input decoder employs iterative decoding, where the iterative decoding criterion can be expressed as:

[0054] In the formula, Represents the probability density function. This represents the decoder input (in this embodiment of the invention, That is ), Indicates the first One original information bit, ; Based on the original signal from the transmitting end The mapping is defined as the log-likelihood ratio. for:

[0055] The iterative decoding criterion can then be further expressed as the following symbol decision form:

[0056] During the decoding iteration process, the log-likelihood ratio is higher than the soft information. The decoding process iterates and interacts among the component decoders; after the decoding iteration is complete, the decoding result, i.e., the decision result, is output. ; Finally, based on the decoding results and the original signal, the bit error rate of the communication system is determined. The verdict The error rate of the communication system is determined by comparing it with the original signal u, for example, by performing a difference comparison.

[0057] This invention presents a soft-information weighting algorithm based on UEP characteristics. Targeting the differentiated anti-interference capabilities of high-order modulation bits, a soft-information weighting mechanism is designed at the receiver. By applying adaptive weighting coefficients to the LLR of high-protection bits, the prior information distribution of the decoder input is optimized. Specifically, since the protection level of each bit in the same symbol of high-order modulation is different, the soft information quality metric of its demodulated output is also different. The weighting algorithm enhances the confidence of the soft information output by the high-protection bits, thereby optimizing the decoder input. During the iterative decoding process, the constraint relationship between encoded codewords is utilized to reduce the bit error rate of the decoder output. This achieves full utilization of the inherent unequal error protection potential of high-order modulation without increasing redundant bits, thus improving the anti-interference performance of the communication system.

[0058] The present invention provides a signal anti-interference method based on high-order modulation inequality error protection. Based on the original signal in the anti-interference communication system, orthogonal amplitude modulation symbols are obtained. These symbols are uniformly mapped to obtain frequency-hopping signals. Then, through symbol-level full-band mapping, the same-source orthogonal amplitude modulation symbols are uniformly mapped to each hop, and frequency-hopping processing is performed to obtain frequency-hopping signals. Based on the frequency-hopping signals, a demodulated signal is obtained. Based on the demodulated signal, the bit error rate of the communication system is determined. The demodulated signal is then obtained through the frequency-hopping signal and used as the input of the orthogonal amplitude modulator / demodulator for soft demodulation, thereby determining the bit error rate of the communication system. This method effectively suppresses interference while ensuring spectral efficiency, thus improving the anti-interference performance of the communication system.

[0059] Based on the above embodiments, the present invention has also conducted experimental verification under various conditions.

[0060] Figure 3 This is a schematic diagram of the bit error rate curve provided by the present invention when the interference bandwidth accounts for 40% of the signal bandwidth, as shown in the figure. Figure 3 As shown.

[0061] Figure 4 This is a schematic diagram of the bit error rate curve provided by the present invention when the interference bandwidth accounts for 50% of the signal bandwidth, as shown in the figure. Figure 4 As shown.

[0062] Figure 5 This is a schematic diagram of the bit error rate curve provided by the present invention when the interference bandwidth accounts for 60% of the signal bandwidth, as shown in the figure. Figure 5 As shown.

[0063] exist Figure 3 , Figure 4 , Figure 5 In the corresponding simulation experiments, the parameters were all set as follows: original signal length TH encoding bitrate hop frequency points The decoder iterates 4 times, and the modulation scheme is 16QAM. From... Figures 3 to 5 As can be seen, in the simulation of partial frequency band interference, the signal anti-interference method based on high-order modulation unequal error protection provided by this invention enables the communication system to have strong error correction capability. Specifically, when the interference bandwidth accounts for 40%, compared with the traditional equal error protection (EEP) bit interleaving system, the communication system based on the signal anti-interference method based on high-order modulation unequal error protection of this invention has a gain of 2.16 dB. When the interference bandwidth accounts for 50% and 60%, the traditional EEP system gradually loses its error correction performance, while the communication system based on the signal anti-interference method based on high-order modulation unequal error protection of this invention can still maintain good anti-interference performance. Compared with the interference bandwidth accounting for 40%, its performance only drops by 1.88 dB and 5.36 dB, respectively.

[0064] The above simulation experiments further verify that the signal anti-interference method based on high-order modulation inequality error protection proposed in this invention enables the communication system to effectively suppress interference while ensuring high spectral efficiency, thereby improving the anti-interference capability of the communication system.

[0065] The following describes a signal anti-interference device based on high-order modulation inequality error protection provided by the present invention. The signal anti-interference device based on high-order modulation inequality error protection described below can be referred to in correspondence with the signal anti-interference method based on high-order modulation inequality error protection described above.

[0066] Based on any of the above embodiments Figure 6 This is a schematic diagram of a signal anti-interference device based on high-order modulation inequality error protection provided by the present invention, as shown below. Figure 6 As shown. This embodiment of the invention provides a signal anti-interference device based on high-order modulation inequality error protection, including an acquisition module 601, a modulation module 602, a mapping module 603, an observation module 604, and a determination module 605, wherein: The acquisition module 601 is used to acquire the original signal in the communication system; the modulation module 602 is used to obtain orthogonal amplitude modulation symbols based on the original signal; the mapping module 603 is used to uniformly map the orthogonal amplitude modulation symbols to obtain a frequency hopping signal; the observation module 604 is used to obtain the demodulated signal based on the frequency hopping signal; and the determination module 605 is used to determine the bit error rate of the communication system based on the demodulated signal.

[0067] The signal anti-interference device based on high-order modulation inequality error protection provided by this invention obtains orthogonal amplitude modulation symbols from the original signal in the anti-interference communication system; uniformly maps the orthogonal amplitude modulation symbols to obtain frequency hopping signals, thereby uniformly mapping the same-source orthogonal amplitude modulation symbols to each hop through symbol-level full-band mapping, performing frequency hopping processing to obtain frequency hopping signals; based on the frequency hopping signals, obtain the signal to be demodulated; based on the signal to be demodulated, determine the bit error rate of the communication system, thereby obtaining the signal to be demodulated through the frequency hopping signals, using it as the input of the orthogonal amplitude modulator / demodulator, performing soft demodulation, and further determining the bit error rate of the communication system. This effectively suppresses interference while ensuring spectral efficiency, improving the anti-interference performance of the communication system.

[0068] Figure 7 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 7 As shown, the electronic device may include: a processor 710, a communications interface 720, a memory 730, and a communication bus 740, wherein the processor 710, the communications interface 720, and the memory 730 communicate with each other via the communication bus 740. The processor 710 can call logic instructions in the memory 730 to execute a signal anti-interference method based on high-order modulation inequality error protection, the method including: To acquire raw signals from a communication system; Based on the original signal, quadrature amplitude modulation symbols are obtained; The orthogonal amplitude modulation symbols are uniformly mapped to obtain a frequency hopping signal; Based on the frequency hopping signal, the signal to be demodulated is obtained; The bit error rate of the communication system is determined based on the signal to be demodulated.

[0069] Furthermore, the logical instructions in the aforementioned memory 730 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0070] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program, the computer program being able to be stored on a non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the computer being able to execute the signal anti-interference method based on high-order modulation inequality error protection provided by the above methods, the method comprising: To acquire raw signals from a communication system; Based on the original signal, quadrature amplitude modulation symbols are obtained; The orthogonal amplitude modulation symbols are uniformly mapped to obtain a frequency hopping signal; Based on the frequency hopping signal, the signal to be demodulated is obtained; The bit error rate of the communication system is determined based on the signal to be demodulated.

[0071] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the signal anti-interference method based on high-order modulation inequality error protection provided by the methods described above, the method comprising: To acquire raw signals from a communication system; Based on the original signal, quadrature amplitude modulation symbols are obtained; The orthogonal amplitude modulation symbols are uniformly mapped to obtain a frequency hopping signal; Based on the frequency hopping signal, the signal to be demodulated is obtained; The bit error rate of the communication system is determined based on the signal to be demodulated.

[0072] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0073] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0074] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0075] In this application's embodiments, "determine B based on A" means that factor A must be considered when determining B. It is not limited to "B can be determined based solely on A," but should also include: "determine B based on A and C," "determine B based on A, C, and E," "determine C based on A, and further determine B based on C," etc. Additionally, it can include using A as a condition for determining B, for example, "when A meets the first condition, determine B using the first method"; another example, "when A meets the second condition, determine B," etc.; another example, "when A meets the third condition, determine B based on the first parameter," etc. Of course, it can also be a condition where A is a factor in determining B, for example, "when A meets the first condition, determine C using the first method, and further determine B based on C," etc.

[0076] In this invention, the term "multiple" refers to two or more, and other quantifiers are similar.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A signal anti-interference method based on high-order modulation inequality error protection, characterized in that, include: Acquire raw signals from a communication system; Based on the original signal, quadrature amplitude modulation symbols are obtained; The orthogonal amplitude modulation symbols are uniformly mapped to obtain a frequency hopping signal; Based on the frequency hopping signal, the signal to be demodulated is obtained; The bit error rate of the communication system is determined based on the signal to be demodulated.

2. The signal anti-interference method based on high-order modulation inequality error protection according to claim 1, characterized in that, The process of obtaining quadrature amplitude modulation symbols based on the original signal includes: The original signal is TH encoded to obtain a low-rate TH codeword; The TH codeword is mapped to a higher-order M-QAM to obtain the quadrature amplitude modulation symbol.

3. The signal anti-interference method based on high-order modulation inequality error protection according to claim 1, characterized in that, The process of uniformly mapping the orthogonal amplitude modulation symbols to obtain a frequency hopping signal includes: The quadrature amplitude modulation symbols are uniformly mapped onto each frequency hopping point of the frequency hopping system to obtain the mapped signal; The mapped signal is subjected to frequency hopping processing to obtain the frequency hopping signal.

4. The signal anti-interference method based on high-order modulation inequality error protection according to claim 1, characterized in that, The process of obtaining the demodulated signal based on the frequency hopping signal includes: Interference detection is performed on the frequency hopping signal to determine the location of interference in the frequency hopping signal; The signal at the interference location is zeroed out to obtain a zeroed signal; The zero-set signal is de-jugated to obtain the original baseband signal; The original baseband signal is de-interleaved to obtain the signal to be demodulated.

5. The signal anti-interference method based on high-order modulation inequality error protection according to claim 4, characterized in that, The step of detecting interference in the frequency-hopping signal and determining the location of interference in the frequency-hopping signal includes: The frequency hopping signal is interfered with to obtain the signal amplitude of each frequency band of the interfered frequency hopping signal; The frequency band location corresponding to the signal amplitude exceeding a preset threshold is defined as the interference location.

6. The signal anti-interference method based on high-order modulation inequality error protection according to claim 1, characterized in that, Determining the bit error rate of the communication system based on the signal to be demodulated includes: The signal to be demodulated is subjected to soft demodulation to obtain soft information corresponding to the signal to be demodulated. The soft information is weighted to obtain weighted soft information; The weighted soft information is decoded to obtain the decoding result; Based on the decoding result and the original signal, the bit error rate of the communication system is determined.

7. A signal anti-interference device based on high-order modulation inequality error protection, characterized in that, include: The acquisition module is used to acquire the raw signals in the communication system; A modulation module is used to obtain quadrature amplitude modulation symbols based on the original signal; The mapping module is used to uniformly map the orthogonal amplitude modulation symbols to obtain a frequency hopping signal; An observation module is used to obtain the demodulated signal based on the frequency hopping signal; The determination module is used to determine the bit error rate of the communication system based on the signal to be demodulated.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the signal anti-interference method based on high-order modulation inequality error protection as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the signal anti-interference method based on high-order modulation inequality error protection as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the signal anti-interference method based on high-order modulation inequality error protection as described in any one of claims 1 to 6.

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