Encryption communication method and system based on probability shaping and double single sideband modulation

Abstract

The invention discloses an encryption communication method and system based on probability shaping and double single side band modulation, and the method comprises the steps: receiving an original bit stream and an initial secret key, and generating a chaotic sequence according to the initial secret key through employing a hyperchaotic model; calculating according to the chaos sequence to obtain a mask factor; performing constellation mapping processing on the original bit stream to obtain a constellation diagram; performing rotation encryption on the constellation diagram according to the mask factor to obtain an encrypted signal; performing QPSK modulation on the encrypted signal to obtain a left sideband carrier signal; performing constellation mapping after performing repeated superposition on the initial key to obtain a key signal; probabilistic shaping and QPSK modulation are carried out on the key signal to obtain a right sideband carrier signal; superposing the left sideband carrier signal and the right sideband carrier signal to obtain a mixed signal, and sending the mixed signal to a receiver through a transmitter; and the security and reliability of key transmission are improved while the signal transmission efficiency is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of encrypted communication, and in particular relates to an encrypted communication method and system based on probability shaping and dual single sideband modulation. Background Art

[0002] Double-sideband modulation is now widely used in radio broadcasting, communication systems, radar systems and satellite communication systems in industrial production. Double-sideband modulation is a basic form of amplitude modulation, which transmits information based on a carrier signal. The spectrum of the double-sideband modulated signal is symmetrical, including an upper sideband (USB) and a lower sideband (LSB). Because the signals carried by the two sidebands are the same, the information of one of the carrier and the sideband is redundant, which leads to low transmission efficiency.

[0003] Therefore, a new modulation method, Double-single-sideband (DSSB), was created based on double-sideband modulation. Double-single-sideband signals can be generated based on an in-phase quadrature (I / Q) modulator, and the two sidebands can transmit different information to achieve higher spectrum efficiency. However, double-single-sideband modulation may have a large distortion problem in some cases, resulting in the inability to decrypt encrypted communication signals, reducing overall communication efficiency and even affecting task execution and decision-making. Summary of the invention

[0004] The present invention provides an encryption communication method and system based on probability shaping and dual single-sideband modulation, which improves the security and reliability of key transmission while ensuring signal transmission efficiency.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The first aspect of the present invention provides an encryption communication method based on probability shaping and dual single sideband modulation, comprising:

[0007] Receiving the original bit stream and the initial key, using the hyperchaotic model to generate chaotic sequences according to the initial key; and obtaining the mask factor according to the chaotic sequence calculation;

[0008] Perform constellation mapping on the original bit stream to obtain a 16QAM constellation diagram; perform rotation encryption on the 16QAM constellation diagram according to the mask factor to obtain an encrypted signal; perform QPSK modulation on the encrypted signal to obtain a left-band carrier signal;

[0009] The initial key is repeatedly superimposed and then constellation mapped to obtain the key signal; the key signal is probability shaped and QPSK modulated to obtain the right-band carrier signal;

[0010] The left-band carrier signal and the right-band carrier signal are superimposed to obtain a mixed signal, and the mixed signal is sent to the receiver through the transmitter;

[0011] In response to the receiver receiving the mixed signal, the mixed signal is demodulated to obtain the encrypted signal and the key signal, and the encrypted signal is decrypted according to the key signal to obtain the original bit stream.

[0012] Furthermore, the hyperchaotic model is used to generate chaotic sequences according to the initial key, and the process includes:

[0013] The hyperchaotic model adopts the Cai's circuit model, and the initial key is input into the Cai's circuit model to obtain the state variable , state variables and state variables , the expression formula is:

[0014]

[0015] In the formula, the initial key is the state variable , state variables and state variables The initial value of; a, b, c and d are set constants; is the intermediate variable; t represents the step length;

[0016] The four-dimensional fractional-order Xu hyperchaotic model is solved by the fourth-order Runge-Kutta algorithm to obtain the state variables at each step size. , state variables and state variables ; The state variables at each step , state variables and state variables As a chaotic sequence.

[0017] Furthermore, the mask factor is obtained according to the chaotic sequence calculation, and the process includes:

[0018]

[0019] In the formula, is the rounding function towards negative infinity; is the remainder operation function; , and is the masking factor.

[0020] Further, the 16QAM constellation diagram is rotated and encrypted according to the mask factor to obtain an encrypted signal, and the process includes:

[0021] The mask factor , mask factor and mask factor As the rotation angle; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the x-axis; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the y-axis; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the z-axis.

[0022] Further, the encrypted signal is QPSK modulated to obtain a left-band carrier signal, and the process includes:

[0023] The encrypted signal is subjected to orthogonal phase shift keying mapping to obtain a first baseband signal, and the first baseband signal is sequentially subjected to upsampling, root raised cosine filtering and up-conversion to obtain a first intermediate frequency signal; a frame header is inserted into the first intermediate frequency signal to obtain a left-band carrier signal.

[0024] Further, the key signal is subjected to probability shaping and QPSK modulation to obtain a right-band carrier signal, the process including:

[0025] Two bits in the key signal are used as a single key symbol; the key symbol is mapped to four phases of QPSK modulation, and the probability of the key symbol is adjusted to obtain a second baseband signal, and the second baseband signal is sequentially up-sampled, root raised cosine filtered and up-converted to obtain a second intermediate frequency signal; a frame header is inserted into the second intermediate frequency signal to obtain a right-band carrier signal.

[0026] Further, the left-band carrier signal and the right-band carrier signal are superimposed to obtain a mixed signal, and the process includes:

[0027]

[0028] in, Represented as a mixed signal; J -1 and J1 is the first kind of Bessel function, R is the resistance of the quadrature modulator IQ, is the IQ modulation depth of the quadrature modulator, and is the amplitude of the left band carrier signal and the right band carrier signal; is the amplitude of the IQ DC component of the quadrature modulator; and is the phase of the left band carrier signal and the right band carrier signal; and is the angular frequency of the left-band carrier signal and the right-band carrier signal, and t represents time.

[0029] Further, the mixed signal is demodulated to obtain the encrypted signal and the key signal, and the process includes:

[0030] The received mixed signal is filtered by a bandpass filter to remove the noise signal, and then converted into a first baseband signal and a second baseband signal through down-conversion; the amplitude and phase of the first baseband signal and the second baseband signal are equalized through a constant modulus algorithm and a blind phase search, and the encryption signal and the key signal are separated through a digital processing algorithm.

[0031] A second aspect of the present invention provides an encrypted communication system based on probability shaping and dual single sideband modulation, comprising:

[0032] The acquisition module is used to receive the original bit stream and the initial key, generate chaotic sequences according to the initial key using the hyperchaotic model, and obtain the mask factor according to the chaotic sequence;

[0033] The encryption module performs constellation mapping on the original bit stream to obtain a 16QAM constellation diagram; performs rotation encryption on the 16QAM constellation diagram according to the mask factor to obtain an encrypted signal; and performs QPSK modulation on the encrypted signal to obtain a left-band carrier signal;

[0034] The transmission module repeatedly superimposes the initial key and then performs constellation mapping to obtain a key signal; performs probability shaping and QPSK modulation on the key signal to obtain a right-band carrier signal; superimposes the left-band carrier signal and the right-band carrier signal to obtain a mixed signal, and sends the mixed signal to the receiver through the transmitter;

[0035] The decryption module, in response to the receiver receiving the mixed signal, demodulates the mixed signal to obtain the encrypted signal and the key signal, and decrypts the encrypted signal according to the key signal to obtain the original bit stream.

[0036] In a third aspect, the present invention provides an electronic device, comprising a storage medium and a processor; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the encryption communication method described in the first aspect.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The chaotic sequence generated by the hyperchaotic model in the present invention is highly unpredictable and complex, making the encryption process more secure and difficult to crack; the mask factor calculated by the chaotic sequence is used to rotate and encrypt the 16QAM constellation diagram, thereby increasing the randomness and concealment of the signal.

[0039] In the present invention, the initial key is repeatedly superimposed as a key signal, which increases the redundancy of the key signal and preliminarily ensures the reliability of key signal transmission; the key signal is probability shaped and QPSK modulated to obtain a right-band carrier signal, and probability shaping of the key signal can reduce the average power of the signal while maintaining the data transmission rate and improving the spectrum efficiency; through the probability shaping technology, the probability of occurrence of low-energy symbols is increased and the probability of occurrence of high-energy symbols is reduced, thereby reducing the bit error rate of key signal transmission, further ensuring the accuracy of key signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a flow chart of an encrypted communication method based on probability shaping and dual single sideband modulation provided by Embodiment 1 of the present invention;

[0041] Figure 2 This is a flow chart of chaotic encryption provided by Embodiment 1 of the present invention;

[0042] Figure 3 is an attractor phase diagram of the hyperchaotic model provided in Example 1 of the present invention;

[0043] Figure 4 Flow chart of obtaining a mixed signal by superimposing a left-side carrier signal and a right-side carrier signal provided in Embodiment 1 of the present invention;

[0044] Figure 5 is a schematic diagram of a mixed signal constellation diagram provided in Embodiment 1 of the present invention;

[0045] Figure 6 is a probability distribution diagram of a left-band carrier signal provided by Embodiment 1 of the present invention;

[0046] Figure 7 is a probability distribution diagram of a right-side carrier signal provided by Embodiment 1 of the present invention;

[0047] Figure 8 It is a probability distribution diagram of the mixed signal provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0049] Example 1

[0050] like Figure 1 As shown, this implementation provides an encryption communication method based on probability shaping and dual single sideband modulation, including:

[0051] Receive the original bit stream and the initial key, such as Figure 2As shown, the hyperchaotic model is used to generate chaotic sequences according to the initial key. The process includes:

[0052] The hyperchaotic model adopts the Cai's circuit model, and the initial key is input into the Cai's circuit model to obtain the state variable , state variables and state variables , the expression formula is:

[0053]

[0054] In the formula, the initial key is the state variable , state variables and state variables The initial value of; a, b, c and d are set constants; is the intermediate variable; t represents the step length;

[0055] The four-dimensional fractional-order Xu hyperchaotic model is solved by the fourth-order Runge-Kutta algorithm to obtain the state variables at each step size. , state variables and state variables ; The state variables at each step , state variables and state variables As a chaotic sequence;

[0056] In this implementation, the initial conditions ( , , n) = (0.2, -0.1, 0.2), state variable , state variables and state variables The value ranges are (- 3,3), (- 1,1), (- 5,5); constants a, b, c and d are 10, 14.87, -1.27, -0.65 respectively; Figure 3 As shown in Figure 1, the attractor phase diagram of the Chua circuit model. Due to the sensitivity of the initial value of the hyperchaotic model, when the initial value of the chaos changes slightly, an almost completely different complex chaotic trajectory will be generated.

[0057] The mask factor is obtained by calculating the chaotic sequence. The process includes:

[0058]

[0059] In the formula, is the rounding function towards negative infinity; is the remainder operation function; , and is the masking factor.

[0060] The original bit stream is processed by constellation mapping to obtain a 16QAM constellation diagram; the 16QAM constellation diagram is rotated and encrypted according to the mask factor to obtain an encrypted signal. The process includes:

[0061] The mask factor , mask factor and mask factor As the rotation angle; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the x-axis; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the y-axis; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the z-axis.

[0062] The encrypted signal is QPSK modulated to obtain the left-band carrier signal. The process includes:

[0063] The encrypted signal is subjected to orthogonal phase shift keying mapping to obtain a first baseband signal, and the first baseband signal is sequentially subjected to upsampling, root raised cosine filtering and up-conversion to obtain a first intermediate frequency signal; a frame header is inserted into the first intermediate frequency signal to obtain a left-band carrier signal.

[0064] The initial key is repeatedly superimposed and then constellation mapped to obtain the key signal; the key signal is probability shaped and QPSK modulated to obtain the right-band carrier signal. The process includes:

[0065] Two bits in the key signal are used as a single key symbol; the key symbol is mapped to four phases of QPSK modulation, and the probability of the key symbol is adjusted to obtain a second baseband signal, the second baseband signal is sequentially upsampled, root raised cosine filtered and up-converted to obtain a second intermediate frequency signal; a frame header is inserted into the second intermediate frequency signal to obtain a right-band carrier signal.

[0066] like Figure 4 As shown, the left-band carrier signal and the right-band carrier signal are superimposed to obtain a mixed signal, and the process includes:

[0067] The left-side carrier signal and the right-side carrier signal can be expressed as:

[0068]

[0069]

[0070] In the formula, It is represented as a carrier signal with a left band; It is represented as a carrier signal on the right; is a first baseband signal; is the second baseband signal; j is an imaginary unit; is the carrier frequency; is pi; t is time;

[0071] Input the left-side carrier signal and the right-side carrier signal into the arbitrary waveform transmitter to add the signals to obtain the superimposed signal , the expression formula is:

[0072]

[0073] The superimposed signal The optical modulated signal is obtained by inputting the electrical amplifier to the orthogonal modulator IQ, and the expression formula is:

[0074]

[0075] In the formula, is an optical modulation signal; Guided light generated by a laser configured as an orthogonal modulator IQ; J -1 and J1 are Bessel functions of the first kind; is the IQ modulation depth of the quadrature modulator, and is the amplitude of the left band carrier signal and the right band carrier signal; and is the phase of the left band carrier signal and the right band carrier signal; and is the angular frequency of the left band carrier signal and the right band carrier signal;

[0076] The optical modulated signal is input into the optical attenuator and the photoelectric converter to obtain a mixed signal. The mixed signal will beat each other and beat itself at the photoelectric converter. The expression formula is:

[0077]

[0078] in, Represented as a mixed signal; R is the resistance of the orthogonal modulator IQ, is the amplitude of the IQ DC component of the orthogonal modulator; t represents time.

[0079] like Figure 5 As shown, the constellation points in the constellation diagram corresponding to the mixed signal are obtained by superimposing the left-band carrier signal and the right-band carrier signal, and satisfy the law of phase addition and amplitude multiplication. At the receiving end, the mixed signal can be separated into the left-band carrier signal and the right-band carrier signal through a digital signal processing algorithm.

[0080] like Figure 6 to Figure 7As shown, the probability distribution diagram of the carrier signal on the left and the carrier signal on the right; Figure 8 As shown in the figure, the probability distribution diagram of the mixed signal; when the probability of (1, 0) in the right-hand carrier signal is much greater than the other three points, the probability of the four points in the center of the final superimposed mixed signal will be higher than the other points; in the process of probability shaping of the key signal, different probabilities are assigned to the symbols according to the channel conditions, thereby improving the efficiency of information transmission. In the case of low signal-to-noise ratio, the channel capacity can be effectively utilized. Under given channel conditions, approaching the theoretical maximum transmission rate of the channel, while adjusting the distribution of symbols, the transmission probability of some symbols that are prone to errors can be reduced, and the transmission probability of those symbols that are more robust under the current channel conditions can be increased, thereby reducing the bit error rate, which is particularly important for optimizing the noise in the above mixed signal. By probability shaping, the probability of points with small energy from the constellation diagram can be increased, and the constellation quality factor can be maximized to obtain the optimal signal.

[0081] The mixed signal is sent to the receiver through the transmitter; in response to the receiver receiving the mixed signal, the mixed signal is demodulated to obtain the encryption signal and the key signal, and the process includes:

[0082] The received mixed signal is filtered by a bandpass filter to remove the noise signal, and then converted into a first baseband signal and a second baseband signal through down-conversion; the amplitude and phase of the first baseband signal and the second baseband signal are equalized through a constant modulus algorithm and a blind phase search, and the encryption signal and the key signal are separated through a digital processing algorithm; the encrypted signal is decrypted according to the key signal to obtain the original bit stream.

[0083] Example 2

[0084] This embodiment provides an encryption communication system based on probability shaping and dual single sideband modulation. The encryption communication system described in this embodiment can be used to execute the encryption communication method described in Embodiment 1. The encryption communication system includes:

[0085] The acquisition module is used to receive the original bit stream and the initial key, generate chaotic sequences according to the initial key using the hyperchaotic model, and obtain the mask factor according to the chaotic sequence;

[0086] The encryption module performs constellation mapping on the original bit stream to obtain a 16QAM constellation diagram; performs rotation encryption on the 16QAM constellation diagram according to the mask factor to obtain an encrypted signal; and performs QPSK modulation on the encrypted signal to obtain a left-band carrier signal;

[0087] The transmission module repeatedly superimposes the initial key and then performs constellation mapping to obtain a key signal; performs probability shaping and QPSK modulation on the key signal to obtain a right-band carrier signal; superimposes the left-band carrier signal and the right-band carrier signal to obtain a mixed signal, and sends the mixed signal to the receiver through the transmitter;

[0088] The decryption module, in response to the receiver receiving the mixed signal, demodulates the mixed signal to obtain the encrypted signal and the key signal, and decrypts the encrypted signal according to the key signal to obtain the original bit stream.

[0089] In this embodiment, probability shaping and QPSK modulation are performed on the key signal to obtain a right-band carrier signal. Probability shaping of the key signal can reduce the average power of the signal while maintaining the data transmission rate and improving the spectrum efficiency. Through the probability shaping technology, the probability of occurrence of low-energy symbols is increased and the probability of occurrence of high-energy symbols is reduced, thereby reducing the bit error rate of key signal transmission, further ensuring the accuracy of key signal transmission.

[0090] Example 3

[0091] This embodiment provides an electronic device, including a storage medium and a processor; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the encryption communication method described in Example 1.

[0092] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0093] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0094] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0095] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0096] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An encryption communication method based on probability shaping and dual single sideband modulation, characterized in that: include: Receiving the original bit stream and the initial key, and using the hyperchaotic model to generate chaotic sequences according to the initial key; Obtain the mask factor according to the chaotic sequence calculation; Perform constellation mapping on the original bit stream to obtain a 16QAM constellation diagram; perform rotation encryption on the 16QAM constellation diagram according to the mask factor to obtain an encrypted signal; perform QPSK modulation on the encrypted signal to obtain a left-band carrier signal; The initial key is repeatedly superimposed and then constellation mapped to obtain the key signal; the key signal is probability shaped and QPSK modulated to obtain the right-band carrier signal; The left-band carrier signal and the right-band carrier signal are superimposed to obtain a mixed signal, and the mixed signal is sent to the receiver through the transmitter; In response to the receiver receiving the mixed signal, the mixed signal is demodulated to obtain the encrypted signal and the key signal, and the encrypted signal is decrypted according to the key signal to obtain the original bit stream.

2. The encryption communication method according to claim 1, characterized in that: The hyperchaotic model is used to generate chaotic sequences according to the initial key. The process includes: The hyperchaotic model adopts the Cai's circuit model, and the initial key is input into the Cai's circuit model to obtain the state variable , state variables and state variables , the expression formula is: ； In the formula, the initial key is the state variable , state variables and state variables The initial value of; a, b, c and d are set constants; is the intermediate variable; t represents the step length; The state variables at each step length are obtained by solving the Chua circuit model using the fourth-order Runge-Kutta algorithm. , state variables and state variables ; The state variables at each step , state variables and state variables As a chaotic sequence.

3. The encryption communication method according to claim 2, characterized in that: The mask factor is obtained by calculating the chaotic sequence. The process includes: ； In the formula, is the rounding function towards negative infinity; is the remainder operation function; , and is the masking factor.

4. The encryption communication method according to claim 3, characterized in that: The 16QAM constellation diagram is rotated and encrypted according to the mask factor to obtain an encrypted signal. The process includes: The mask factor , mask factor and mask factor As the rotation angle; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the x-axis; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the y-axis; according to the mask factor For the 16QAM constellation diagram The constellation points are rotated around the z-axis.

5. The encryption communication method according to claim 1, characterized in that: The encrypted signal is QPSK modulated to obtain the left-band carrier signal. The process includes: The encrypted signal is subjected to orthogonal phase shift keying mapping to obtain a first baseband signal, and the first baseband signal is sequentially subjected to upsampling, root raised cosine filtering and up-conversion to obtain a first intermediate frequency signal; a frame header is inserted into the first intermediate frequency signal to obtain a left-band carrier signal.

6. The encryption communication method according to claim 1, characterized in that: The key signal is probability shaped and QPSK modulated to obtain the right-band carrier signal. The process includes: Two bits in the key signal are used as a single key symbol; the key symbol is mapped to four phases of QPSK modulation, and the probability of the key symbol is adjusted to obtain a second baseband signal, and the second baseband signal is sequentially up-sampled, root raised cosine filtered and up-converted to obtain a second intermediate frequency signal; a frame header is inserted into the second intermediate frequency signal to obtain a right-band carrier signal.

7. The encryption communication method according to claim 1, characterized in that: The left-band carrier signal and the right-band carrier signal are superimposed to obtain a mixed signal. The process includes: ； in, Represented as a mixed signal; J -1 and J1 is the first kind of Bessel function, R is the resistance of the quadrature modulator IQ, is the IQ modulation depth of the quadrature modulator, and is the amplitude of the left band carrier signal and the right band carrier signal; is the amplitude of the IQ DC component of the quadrature modulator; and is the phase of the left band carrier signal and the right band carrier signal; and is the angular frequency of the left-band carrier signal and the right-band carrier signal, and t represents time.

8. The encryption communication method according to claim 1, characterized in that: The mixed signal is demodulated to obtain the encrypted signal and the key signal. The process includes: The received mixed signal is filtered by a bandpass filter to remove the noise signal, and then converted into a first baseband signal and a second baseband signal through down-conversion; the amplitude and phase of the first baseband signal and the second baseband signal are equalized through a constant modulus algorithm and a blind phase search, and the encryption signal and the key signal are separated through a digital processing algorithm.

9. An encrypted communication system based on probability shaping and dual single sideband modulation, characterized in that: include: The acquisition module is used to receive the original bit stream and the initial key, and use the hyperchaotic model to generate chaotic sequences according to the initial key; Obtain the mask factor according to the chaotic sequence calculation; The encryption module performs constellation mapping on the original bit stream to obtain a 16QAM constellation diagram; The 16QAM constellation diagram is rotated and encrypted according to the mask factor to obtain an encrypted signal; the encrypted signal is QPSK modulated to obtain a left-band carrier signal; The transmission module repeatedly superimposes the initial key and then performs constellation mapping to obtain a key signal; performs probability shaping and QPSK modulation on the key signal to obtain a right-band carrier signal; superimposes the left-band carrier signal and the right-band carrier signal to obtain a mixed signal, and sends the mixed signal to the receiver through the transmitter; The decryption module, in response to the receiver receiving the mixed signal, demodulates the mixed signal to obtain the encrypted signal and the key signal, and decrypts the encrypted signal according to the key signal to obtain the original bit stream.

10. An electronic device comprising a storage medium and a processor; the storage medium is used to store instructions; characterized in that: The processor is used to operate according to the instructions to execute the encryption communication method according to any one of claims 1 to 8.

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