Frequency hopping anti-interference communication system and method based on chaotic random number

Abstract

The invention provides a frequency hopping anti-interference communication system and method based on a chaotic random number, and the system comprises a transmitting end information modulation module which carries out the modulation processing of an original baseband signal; the transmitting end frequency hopping module is used for determining the frequency of a frequency hopping channel; the transmitting end mixer module is used for mixing and carrying out up-conversion processing; the transmitting end antenna module transmits the radio frequency signal waveguide and transmits the radio frequency signal to a free space; the receiving end antenna module is used for receiving a transmitting signal; the receiving end mixer module converts the frequency of the signal and transmits the signal to the receiving end intermediate frequency filter module; the receiving end frequency hopping module is used for determining the frequency of a frequency hopping channel; the receiving end intermediate frequency filter is used for carrying out filtering processing on the signal subjected to frequency conversion; and the receiving end baseband signal module is used for obtaining an original baseband signal transmitted by the transmitting end after filtering processing. According to the invention, the combination of random channel selection and chaotic channel selection is adopted in the frequency hopping module, so that information transmission is realized under the condition that an initial seed is not shared in advance, and the security of a communication system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-interference communication, and in particular to a frequency hopping anti-interference communication system and method based on chaotic random numbers. Background Art

[0002] At present, the field of anti-interference communication technology is mainly based on frequency hopping and spread spectrum, among which frequency hopping is the most widely used and is still the mainstream of the communication anti-interference technology system, and its technology is still developing. In addition, it also includes various anti-interference methods in time, space, frequency, and network domains, specifically including time hopping, burst, smart antenna, directional communication, etc. Among them, the main principle of frequency hopping communication is that the transmission frequency jumps discretely on a set of pre-specified frequencies in the order specified by the coding sequence, thereby expanding the transmission spectrum. Frequency hopping generally uses a pseudo-random sequence to control the frequency synthesizer, constitute frequency hopping instructions and frequency hopping patterns, and randomly selects the transmission frequency according to the frequency hopping instructions. At the receiving end, a frequency hopping instruction composed of the same local pseudo-random sequence generator as the transmitting end is required to control the local frequency synthesizer in order to restore the original signal. Therefore, the pseudo-random sequence generator plays an important role. The performance of the frequency hopping pattern has a decisive influence on the anti-interception and anti-interference performance of the frequency hopping communication system. Increasing the hopping rate and selecting a suitable frequency hopping pattern are both important methods to improve the frequency hopping capability. However, the effect of increasing the hopping rate is limited by the electronic bottle song of the equipment. Therefore, in order to make a frequency hopping communication system have the best anti-interference and anti-interception characteristics, a well-designed pseudo-random sequence generator is crucial.

[0003] Pseudo-random number generators are indispensable tools in modern computing. They mainly generate fast random numbers with a certain period by designing algorithms and initial seed values. However, there are some disadvantages in the current frequency-modulated anti-interference communication based on pseudo-random number generators. First, the initial seed value needs to be shared in advance. Once the initial seed and algorithm are cracked, the seed or random sequence data may face the risk of being copied or even predicted in advance. Secondly, the length of the generated random sequence is limited and there is periodicity, which poses a hidden danger in scenarios that require high confidentiality. With the continuous improvement of computing power, there are endless incidents of cracking and interception of pseudo-random number frequency-hopping anti-interference communication. Summary of the invention

[0004] In view of the defects in the prior art, the object of the present invention is to provide a frequency hopping anti-interference communication system and method based on chaotic random numbers.

[0005] A frequency hopping anti-interference communication system based on chaotic random numbers provided by the present invention comprises: The transmitting end baseband signal module is used to provide the original baseband signal of the communication system; The transmitting end information modulation module is used to modulate the original baseband signal; The transmitting end frequency hopping module is used to determine the frequency of the frequency hopping channel; The transmitting end mixer module is used to mix the modulated signal with the frequency hopping channel frequency and perform up-conversion processing; The transmitting end antenna module is used to transmit the radio frequency signal waveguide and emit it into free space; The receiving end antenna module is used to receive the signal transmitted to the free space by the transmitting end antenna module; The receiving end mixer module is used to transmit the received signal to the receiving end intermediate frequency filter module after down-conversion by the receiving end mixer; A frequency hopping module at the receiving end, used to determine the frequency of the frequency hopping channel; The intermediate frequency filter at the receiving end is used to perform intermediate frequency filtering on the signal after the down-conversion of the mixer at the receiving end; The receiving end baseband signal module is used to obtain the original baseband signal transmitted by the transmitting end after intermediate frequency filtering by the intermediate frequency filter of the receiving end.

[0006] Preferably, the transmitting end frequency hopping module and the receiving end frequency hopping module both include a random channel selection stage, a chaotic channel selection stage and a frequency synthesizer.

[0007] Preferably, the transmitting end frequency hopping module and the receiving end frequency hopping module can exchange initial seed values ​​in the random channel selection phase, and apply the initial seed value to chaotic mapping in the chaotic channel selection phase to determine the frequency of the frequency hopping channel.

[0008] Preferably, the frequency synthesizer is used to generate the required frequency hopping channel frequency to ensure synchronization between the transmitting end and the receiving end.

[0009] Preferably, a channel table is also included to guide the random channel selection process of the transmitting end and the receiving end.

[0010] A frequency hopping anti-interference communication method based on chaotic random numbers provided by the present invention comprises: Preparation steps: Connect all modules in the system in sequence and set up the channel table; Frequency hopping step: After the transmitter and receiver select channels in the random channel selection phase, they use the same initial seed value in the chaotic channel selection phase to determine the frequency of the frequency hopping channel through chaotic mapping; Signal transmission step: after the baseband signal is modulated by the transmitting end information modulation module in the transmitting end baseband signal module, the baseband signal is up-converted and modulated with the frequency hopping frequency obtained by the transmitting end frequency hopping module in the transmitting end mixer module, and then transmitted to the free space through the transmitting end antenna module; Signal receiving step: the antenna module at the receiving end transmits the received RF signal to the mixer module at the receiving end, and the frequency hopping frequency obtained by the frequency hopping module at the receiving end is down-converted and modulated in the mixer module at the receiving end, and after the intermediate frequency filtering signal is processed by the intermediate frequency filter at the receiving end, the original baseband signal is obtained in the baseband signal module at the receiving end.

[0011] Preferably, the frequency hopping step includes causing the transmitting end and the receiving end to perform frequency synchronization by exchanging initial seed values, so as to keep the frequency consistent during the communication process.

[0012] Preferably, the signal transmitting step includes causing the transmitting end to encode and modulate the baseband signal.

[0013] Preferably, the random channel selection stage includes causing the frequency hopping modules at the transmitting end and the receiving end to generate random numbers, and the center frequency of the random channel transmission is MHz; in, For Channel The corresponding channel frequency bandwidth number; The chaotic channel selection phase includes making the transmitter and the receiver send and receive information at randomly selected frequencies. When the frequencies of the transmitter and the receiver coincide, the transmitter and the receiver exchange initial seed values ​​of chaotic signals.

[0014] Preferably, the chaotic channel selection stage also includes inputting the initial seed value of the exchanged chaotic signal into the Lang-Kobayashi chaotic map, obtaining the chaotic index value through iteration and algorithm processing; after determining the channel and frequency hopping channel frequency based on the channel table, inputting the frequency synthesizer.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention combines random channel selection with chaotic channel selection in the frequency hopping module to achieve information transmission without pre-sharing the initial seed, thereby improving the security of the communication system.

[0016] 2. The present invention adopts the Lang-Kobayashi chaotic mapping based on the nonlinear dynamics of semiconductor lasers as a chaos generator. The chaos generator based on the nonlinear dynamics of semiconductor lasers is an ideal source of random bits; in addition, it can generate a larger positive Lyapunov exponent and support high-speed random bit generation.

[0017] 3. The frequency hopping module generation method in the present invention is simple. Through the generation rules, initial conditions and mapping functions, a pseudo-random sequence that is almost impossible to decipher can be determined. The generated random sequence has good correlation and balance, which provides a reference and reference for the development of anti-interference communication technology.

[0018] Other beneficial effects of the present invention will be explained in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a system block diagram of the present invention.

[0020] Figure 2 A schematic diagram of random channel selection in the present invention.

[0021] Figure 3 Schematic diagram of chaotic channel selection in the present invention.

[0022] Figure 4 It is a schematic diagram of the channel frequency table in the present invention.

[0023] Figure 5 The present invention is a flow chart of the method.

[0024] Reference numerals DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0026] Reference Figure 1 As shown, a frequency hopping anti-interference communication system based on chaotic random numbers includes: The transmitting end baseband signal module 1 is used to provide the original baseband signal of the communication system; The transmitting end information modulation module 2 is used to modulate the original baseband signal; The transmitting end frequency hopping module 3 includes a random channel selection stage, a chaotic channel selection stage and a frequency synthesizer. The frequency hopping module determines the frequency of the frequency hopping channel. Specifically, the initial seed value is exchanged in the random signal selection stage, and in the chaotic channel selection stage, the initial seed value is applied to the chaotic mapping to determine the frequency of the frequency hopping channel; The transmitting end mixer module 4 is used to mix the modulated signal with the frequency of the frequency hopping channel and perform up-conversion processing; The transmitting end antenna module 5 is used to transmit the radio frequency signal waveguide and emit it into free space; The receiving end antenna module 6 is used to receive the signal transmitted to the free space by the transmitting end antenna module 5; The receiving end mixer module 7 is used to down-convert the received signal through the receiving end mixer and then transmit it to the receiving end intermediate frequency filter module 9; The receiving end frequency hopping module 8 includes a random channel selection stage, a chaotic channel selection stage and a frequency synthesizer, and the frequency hopping module determines the frequency of the frequency hopping channel. Specifically, the initial seed value is exchanged in the random signal selection stage, and in the chaotic channel selection stage, the initial seed value is applied to the chaotic mapping to determine the frequency of the frequency hopping channel; The receiving end intermediate frequency filter 9 performs intermediate frequency filtering on the signal after the down-conversion of the receiving end mixer; The receiving end baseband signal module 10 obtains the original baseband signal transmitted by the transmitting end after being processed by the receiving end intermediate frequency filter 9 and the like.

[0027] Reference Figure 5 As shown, based on the above system, the present invention also provides a communication method of a frequency hopping anti-interference communication system based on chaotic random numbers, comprising the following steps: Preparation steps: The operator connects the transmitting end baseband signal module 1, the transmitting end information modulation module 2, the transmitting end frequency hopping module 3, the transmitting end mixer module 4, and the transmitting end antenna module 5; the operator connects the receiving end antenna module 6, the receiving end mixer module 7, the receiving end frequency hopping module 8, the receiving end intermediate frequency filter 9, and the receiving end baseband signal module 10, and prepares a channel table; Frequency hopping step: The transmitting end frequency hopping module 3 and the receiving end frequency hopping module 7 include a random channel selection stage and a chaotic channel selection stage. In the channel selection stage, the transmitting end and the receiving end send and receive information at the randomly selected frequency. When the transmitting end and the receiving end frequency coincide, it is the initial seed value for the transmitting end and the receiving end to exchange chaotic signals. In the chaotic channel selection stage, after chaotic mapping, the channel and frequency hopping channel frequency are determined and input into the frequency synthesizer; Signal transmission step: the baseband signal to be transmitted is encoded and modulated by the transmitting end information modulation module 2 in the transmitting end baseband signal module 1, and the frequency hopping frequency obtained by the transmitting end frequency hopping module 3 is up-converted and modulated in the transmitting end mixer module 4, and then transmitted 5 to the free space through the transmitting end antenna module; Signal receiving step: The antenna module 6 at the receiving end transmits the received RF signal to the mixer module 7 at the receiving end, and performs down-conversion modulation with the frequency hopping frequency obtained by the frequency hopping module 8 at the receiving end in the mixer module 7 at the receiving end, and then after signal processing such as intermediate frequency filtering by the intermediate frequency filter 9 at the receiving end, the original baseband signal is obtained in the baseband signal module 10 at the receiving end.

[0028] The above is a basic embodiment of the present invention. The technical solution of the present invention is further described below through a preferred embodiment.

[0029] Example 1 like Figure 1 As shown, a frequency hopping anti-interference communication system based on chaotic random numbers includes: Transmitter baseband signal module 1, transmitter information modulation module 2, transmitter frequency hopping module 3, transmitter mixer module 4, transmitter antenna module 5, receiver antenna module 6, receiver mixer module 7, receiver frequency hopping module 8, receiver intermediate frequency filter 9, receiver baseband signal module 10; The transmitting end baseband signal module 1 is used to provide the original baseband signal of the communication system; specifically, the provided original baseband signal of the communication system is transmitted to the information modulation module 2; The transmitting end information modulation module 2 encodes and modulates the baseband signal and then transmits the signal to the transmitting end mixer module 4; The transmitting end frequency hopping module 3 includes a random channel selection stage, a chaotic channel selection stage and a frequency synthesizer to determine the frequency of the frequency hopping channel. Specifically, Figure 2 As shown in Figure 1, during the random channel selection phase, the transmitter and receiver do not rely on any encrypted channel, but send and receive on randomly selected frequencies. At a specific moment, the channel frequencies of the transmitter and receiver coincide. During this period of time, Figure 3 As shown, the transmitter exchanges the initial seed value of the chaotic signal with the receiver, and then enters the chaotic selection stage, and inputs the exchanged initial seed value into the Lang-Kobayashi chaotic mapping, as shown in formulas (1)-(3):

[0030]

[0031]

[0032] in, is the electric field strength, is the electric field phase, is the carrier density, is the gain coefficient, is the photon lifetime, is the cavity round trip time, is the undisturbed angular frequency of the semiconductor laser, is the external cavity round trip time ( is the length of the outer cavity, c is the speed of light), e is the elementary charge, Vis the volume of the active region. The dynamic parameter values ​​of each semiconductor laser can be experimentally measured by the four-wave mixing method. Other values ​​are initial seed values, including the line width enhancement factor , External cavity length , injection current density , feedback strength ( κ ), the specific physical meaning can also be referred to B.Nie,et al, IEEE J. Lightwave Technol., 38, (19), pp. 5423-5429, 2020 and B.Nie, etal, IEEE J. Lightwave Technol., 40, (20), pp. 6737-6744, 2022. By inputting the initial seed value, the fourth-order Runge-Kutta algorithm is used to solve formula (1)-formula (3). By iterating the chaotic equation multiple times, different discrete values ​​are obtained. , after normalization, the obtained discrete In the range [-1, +1], use the following formula (4):

[0033] in, is an integer, , the obtained discrete chaotic value The maximum value of Converts to a chaotic integer value after int operation , then use formula (5):

[0034] in, is the total number of frequency hopping channels, for chaotic integer values Perform mod operation to obtain the chaos index value , thereby determining the channel number, and then according to Figure 4 The channel frequency table shown is used to determine the frequency hopping channel frequency.

[0035] The transmitting end mixer module 4 is used to mix the modulated signal with the carrier of the transmitting end frequency hopping module 3 to perform up-conversion processing; The transmitting end antenna module 5 is used to transmit the radio frequency signal waveguide and emit it into free space; The receiving end antenna module 6 is used to receive the signal emitted by the transmitting end antenna module 5 to the free space and transmit it to the receiving end mixer 7; The receiving end mixer module 7 is used to down-convert the received signal through the receiving end mixer and then transmit it to the receiving end intermediate frequency filter module 9; The receiving end frequency hopping module 8 includes a random channel selection stage, a chaotic channel selection stage and a frequency synthesizer to determine the frequency of the frequency hopping channel. Specifically, the implementation method is the same as the working principle of the transmitting end frequency hopping module; The receiving end baseband signal module 10 obtains the original baseband signal transmitted by the transmitting end after being processed by the receiving end intermediate frequency filter 9 and the like.

[0036] Reference Figure 5 As shown, a method of frequency hopping anti-interference communication based on chaotic random numbers, the actual operation steps are as follows.

[0037] Preparation step A: Preparatory work; specifically as follows: Step A1: The operator connects the baseband signal module 1 of the transmitting end, the information modulation module 2 of the transmitting end, the frequency hopping module 3 of the transmitting end, the mixer module 4 of the transmitting end, and the antenna module 5 of the transmitting end, and checks the transmitting end, and promptly eliminates any abnormality if any; Step A2: The operator connects the receiving end antenna module 6, the receiving end mixer module 7, the receiving end frequency hopping module 8, the receiving end intermediate frequency filter 9, and the receiving end baseband signal module 10, and checks the receiving end. If any abnormality is found, it is promptly checked; Step A3: The operator prepares a channel table, specifically, Figure 4 The channel table shown uses a frequency band of 1.4 GHz, consisting of 49 channels, each with a bandwidth of 1 MHz. The starting frequency is 1400 MHz and the ending frequency is 1450.5 MHz. Represents a channel, whose range is ={0,1,2,3,…,48}.

[0038] Frequency hopping module step S: The frequency hopping module includes a random channel selection phase and a chaotic channel selection phase; specifically, as follows: Step S1: random channel selection stage, specifically, the random number generation step of the frequency hopping module at the transmitting end and the receiving end, the center frequency of the random channel transmission MHz, For Channel The corresponding channel frequency bandwidth number, such as Figure 2 As shown, in the channel selection stage, the transmitter and the receiver send and receive information at randomly selected frequencies. When the frequencies of the transmitter and the receiver coincide, it is the initial seed value of the chaotic signal exchanged between the transmitter and the receiver. Step S2: Then enter the chaotic channel selection phase. Specifically, Figure 3 As shown, the initial seed value of the chaotic signal obtained by exchange is input into the Lang-Kobayashi chaotic map. After iteration and algorithm processing, the chaotic index value is obtained. Figure 4The channel table shown determines the channel and frequency hopping channel frequency and inputs the frequency synthesizer; Signal transmission step: the baseband signal to be transmitted is encoded and modulated by the transmitting end information modulation module 2 in the transmitting end baseband signal module 1, and the frequency hopping frequency obtained by the transmitting end frequency hopping module 3 is up-converted and modulated in the transmitting end mixer module 4, and then transmitted 5 to the free space through the transmitting end antenna module; Signal receiving step: The antenna module 6 at the receiving end transmits the received RF signal to the mixer module 7 at the receiving end, and performs down-conversion modulation with the frequency hopping frequency obtained by the frequency hopping module 8 at the receiving end in the mixer module 7 at the receiving end, and then after signal processing such as intermediate frequency filtering by the intermediate frequency filter 9 at the receiving end, the original baseband signal is obtained in the baseband signal module 10 at the receiving end.

[0039] At this point, the frequency hopping anti-interference communication system based on chaotic random numbers completes frequency hopping communication.

[0040] The present invention combines random channel selection with chaotic channel selection in a frequency hopping module, thereby realizing information transmission without pre-sharing an initial seed and improving the security of the communication system.

[0041] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0042] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A frequency hopping anti-interference communication system based on chaotic random numbers, characterized in that: include: The transmitting end baseband signal module (1) is used to provide the original baseband signal of the communication system; The transmitting end information modulation module (2) is used to modulate the original baseband signal; A transmitting end frequency hopping module (3), used for determining the frequency of the frequency hopping channel; A transmitting end mixer module (4) is used to mix the modulated signal with the frequency of the frequency hopping channel to perform up-conversion processing; A transmitting end antenna module (5), used for transmitting the radio frequency signal through a waveguide and emitting it into free space; A receiving end antenna module (6), used for receiving a signal transmitted to free space by the transmitting end antenna module (5); A receiving end mixer module (7), used for down-converting the received signal through the receiving end mixer and then transmitting it to the receiving end intermediate frequency filter module (9); A receiving end frequency hopping module (8), used for determining the frequency of the frequency hopping channel; A receiving-end intermediate frequency filter (9), used for performing intermediate frequency filtering on the signal after the down-conversion by the receiving-end mixer; The receiving end baseband signal module (10) is used to obtain the original baseband signal transmitted by the transmitting end after intermediate frequency filtering processing by the receiving end intermediate frequency filter (9).

2. The frequency hopping anti-interference communication system based on chaotic random numbers according to claim 1 is characterized in that: The transmitting end frequency hopping module (3) and the receiving end frequency hopping module (8) both include a random channel selection stage, a chaotic channel selection stage and a frequency synthesizer.

3. The frequency hopping anti-interference communication system based on chaotic random numbers according to claim 2 is characterized in that: The transmitting end frequency hopping module (3) and the receiving end frequency hopping module (8) can exchange initial seed values ​​in the random channel selection phase, and apply the initial seed value to the chaotic mapping in the chaotic channel selection phase to determine the frequency of the frequency hopping channel.

4. The frequency hopping anti-interference communication system based on chaotic random numbers according to claim 3 is characterized in that: The frequency synthesizer is used to generate the required frequency hopping channel frequency to ensure synchronization between the transmitting end and the receiving end.

5. The frequency hopping anti-interference communication system based on chaotic random numbers according to claim 1 is characterized in that: A channel table is also included to guide the random channel selection process at the transmitter and receiver.

6. A frequency hopping anti-interference communication method based on chaotic random numbers, based on the frequency hopping anti-interference communication system based on chaotic random numbers according to any one of claims 1 to 5, characterized in that: The following steps are involved: Preparation steps: Connect all modules in the system in sequence and set up the channel table; Frequency hopping step: After the transmitter and receiver select channels in the random channel selection phase, they use the same initial seed value in the chaotic channel selection phase to determine the frequency of the frequency hopping channel through chaotic mapping; Signal transmission step: after the baseband signal is modulated by the transmitting end information modulation module (2) at the transmitting end baseband signal module (1), the baseband signal is up-converted and modulated with the frequency hopping frequency obtained by the transmitting end frequency hopping module (3) at the transmitting end mixer module (4), and then transmitted to free space through the transmitting end antenna module (5); The signal receiving step is as follows: the receiving end antenna module (6) transmits the received radio frequency signal to the receiving end mixer module (7), performs down-conversion modulation with the frequency hopping frequency obtained by the receiving end frequency hopping module (8) in the receiving end mixer module (7), and after the intermediate frequency filtering signal is processed by the intermediate frequency filter (9) at the receiving end, the original baseband signal is obtained in the receiving end baseband signal module (10).

7. The frequency hopping anti-interference communication method based on chaotic random numbers according to claim 6 is characterized in that: The frequency hopping step includes enabling the transmitting end and the receiving end to perform frequency synchronization by exchanging initial seed values, so as to keep the frequency consistent during the communication process.

8. The frequency hopping anti-interference communication method based on chaotic random numbers according to claim 6 is characterized in that: The signal transmitting step includes causing the transmitting end to encode and modulate the baseband signal.

9. The frequency hopping anti-interference communication method based on chaotic random numbers according to claim 6 is characterized in that: The random channel selection stage includes causing the frequency hopping modules at the transmitting end and the receiving end to generate random numbers. The center frequency of the random channel transmission is MHz; in, For Channel The corresponding channel frequency bandwidth number; The chaotic channel selection phase includes making the transmitter and the receiver send and receive information at randomly selected frequencies. When the frequencies of the transmitter and the receiver coincide, the transmitter and the receiver exchange initial seed values ​​of chaotic signals.

10. The frequency hopping anti-interference communication method based on chaotic random numbers according to claim 9 is characterized in that: The chaotic channel selection stage also includes inputting the initial seed value of the exchanged chaotic signal into the Lang-Kobayashi chaotic map, and obtaining the chaotic index value through iteration and algorithm processing; after determining the channel and frequency hopping channel frequency based on the channel table, inputting the frequency synthesizer.

Images