Full-polarization precise interference waveform generation method based on constant modulus constraint

Abstract

The invention discloses a full-polarization precise interference waveform generation method based on constant modulus constraint, and the method comprises the steps: multiplying a receiving wave beam weight by a receiving signal, and recovering a radar angular domain signal, thereby obtaining two paths of polarization signals; according to the full-polarization radar array response matrix, the full-polarization jammer emission signal and the two paths of polarization signals, performing polarization modulation on the recovered radar angular domain signal by using a polarization scattering matrix, and determining an emission signal design model of the jammer; and carrying out iterative solution on the emission signal design model of the jammer to generate a complete polarization jamming signal for the complete polarization radar. According to the method provided by the invention, polarization modulation is carried out on the interference emission signal through the polarization scattering matrix, and the constructed jammer emission signal design model is solved, so that the generation of the full-polarization interference waveform can be realized, the problem that a single-polarization interference signal is easy to identify can be avoided, and the interference capability on a full-polarization radar is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of radar jamming signal generation, and in particular relates to a method for generating a full-polarization precise jamming waveform based on constant modulus constraints. Background Art

[0002] With the upgrading of electronic countermeasures, in order to prevent the normal operation of radar, advanced electronic jammers have flooded into radar receivers in large quantities, destroying the radar's detection, measurement, tracking and identification of target signals by means of suppression and deception. However, most of the current electronic jammers are single-polarized, and most of them are interception and forwarding jammers. With the rapid development and application of full-polarization radar technology, this traditional single-polarization jammer method is facing unprecedented challenges. Full-polarization radar can simultaneously receive and process signals from different polarization directions, and has higher information acquisition capabilities and anti-interference performance. Therefore, when single-polarization jammers attempt to invade the full-polarization radar system, since the polarization scattering matrix rank of the single-polarization jammer signal is 1, and the equivalent scattering matrix of the intermittent sampling forwarding jammer is a unit matrix; the characteristics of this jammer signal in the polarization domain will become extremely obvious, making it very easy to be identified and distinguished by the radar system. Summary of the invention

[0003] The embodiment of the present invention provides a method for generating a full-polarization precise interference waveform based on constant modulus constraint, which can solve the problem that the current interference signal is easy to be identified.

[0004] In a first aspect, an embodiment of the present invention provides a method for generating a full-polarization precise interference waveform based on a constant modulus constraint, the method comprising:

[0005] The radar angular domain signal is recovered by multiplying the receiving beam weight with the receiving signal to obtain two polarization signals, wherein the receiving signal is transmitted by the full polarization radar;

[0006] According to the full polarization radar array response matrix, the full polarization jammer transmission signal and the two-way polarization signal, the polarization scattering matrix is ​​used to perform polarization modulation on the recovered radar angular domain signal, and the jammer transmission signal design model is determined;

[0007] The transmission signal design model of the jammer is solved iteratively to generate a fully polarized jammer waveform for the jammed machine.

[0008] In a second aspect, an embodiment of the present invention provides a jammer, including:

[0009] A receiving signal processing unit, the receiving signal processing unit is used to recover the radar angular domain signal by multiplying the receiving beam weight with the receiving signal to obtain two polarization signals, wherein the receiving signal is transmitted by a fully polarized radar;

[0010] The model adaptive unit uses the polarization scattering matrix to perform polarization modulation on the recovered radar angular domain signal according to the full polarization radar array response matrix, the full polarization jammer transmission signal and the two-way polarization signal, and determines the jammer transmission signal design model;

[0011] The iterative solution unit is used to iteratively solve the transmission signal design model of the jammer to generate a fully polarized jamming waveform for the fully polarized radar.

[0012] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: according to the method provided by the present invention, the interference transmission signal is polarization modulated by the polarization scattering matrix, and the constructed jammer transmission signal design model is solved, so that the generation of a fully polarized interference signal waveform can be achieved, thereby avoiding the problem that a single-polarized interference signal is easily identified, and improving the interference capability against a fully polarized radar. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A flowchart of a method for generating a full-polarization precise interference waveform based on constant modulus constraint provided in an embodiment of the present invention;

[0014] Figure 2 A flowchart of an implementation of an iterative solution method for a transmission signal recovery model provided by an embodiment of the present invention;

[0015] Figure 3 A schematic diagram of the structure of a jammer provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0017] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0018] It should also be understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0019] As used in the present specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]", depending on the context.

[0020] In addition, in the description of the present specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0021] References to "one embodiment" or "some embodiments" etc. described in the present specification mean that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0022] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0023] Figure 1 The flowchart shown is a method for generating a full polarization precise jamming waveform based on constant modulus constraint provided by an embodiment of the present invention. As an example but not a limitation, the generation method can be applied to a jammer, and the generation method can include steps S101-S102, and each step is described below.

[0024] S101, multiplying the received beam weight by the received signal to restore the radar angular domain signal to obtain two polarization signals.

[0025] In one example, if the jammer is activated for the first time, before acquiring two polarization signals, the fully polarized electronic interceptor that intercepts the received signal can be angle measured to calculate the receiving beam weight of the fully polarized electronic interceptor. The fully polarized electronic interceptor can be a component in the jammer.

[0026] Exemplarily, the beam weight of the fully polarized electronic interceptor may satisfy the following formula:

[0027]

[0028] W is the beam weight of the fully polarized electronic interceptor, A rJ is the array polarization beam matrix of the fully polarized electronic interceptor, is the arrival angle of the array receiving signal of the fully polarized electronic interceptor, (·) H represents the conjugate transpose operation, (·) -1 Represents the inverse operation.

[0029] In one example, if the jammer has been activated and the beam weight is known, the beam weight can be directly multiplied by the received signal to obtain two polarization signals X = [x H ,x V ], where x H is the recovered radar angular domain signal in the horizontal polarization dimension, x V is the recovered radar angular domain signal in the vertical polarization dimension.

[0030] Exemplarily, the received signal may be transmitted by a fully polarized radar, and a fully polarized electronic interceptor and a jammer are the jammers.

[0031] S102, according to the full polarization radar array response matrix, the full polarization jammer transmission signal, the two-way polarization signal and the simulated polarization scattering matrix, the polarization modulation is performed on the restored radar angular domain signal using the polarization scattering matrix to determine the jammer transmission signal design model.

[0032] In a possible implementation, according to the full-polarization radar array response matrix of the jammer, the full-polarization jammer transmission signal, the two-way polarization signal and the simulated polarization scattering matrix, the optimization problem of the jammer transmission signal is constructed to obtain the transmission signal design model of the jammer for the full-polarization radar.

[0033] Exemplarily, the transmission signal design model of the jammer satisfies the constant modulus constraint, which may specifically satisfy the following formula:

[0034]

[0035] st|s i |=1,i=1,...,N

[0036] Among them, s represents the interference transmission signal, β i is the gain and phase information of the i-th transmission channel of the jammer, N is the number of signals transmitted by the jammer, I is the unit array, X is the two-way polarization signal, represents the Kronecker product, t i is the simulated interference polarization scattering vector of the jammer’s ith transmission channel, M is the full polarization radar array response matrix, and s Ji =vec(S i ), si is the i-th transmitted signal of the jammer.

[0037] The polarization scattering matrix (t i ) can perform polarization modulation on the radar angular domain signal to approximate the real target echo and target polarization scattering matrix.

[0038] In one example, if the jammer includes N t There are transmitting antennas, and the polarized transmitting beam of the i′th antenna is p i′ ,i′=1,...,N t , then the full polarization radar array response matrix can satisfy the following formula:

[0039]

[0040] in, N t The polarization transmission beam of the transmitting antenna is the array polarization transmission beam matrix constructed by the row vector, a t To guide the jammer array appropriately, It is the spatial angle of the jammer relative to the fully polarized radar (i.e. the interfered party).

[0041] In one example, if the jammer can transmit N jamming transmission signals, each jamming transmission signal consists of N t Phase coded signal Composition, then N t The phase coded signal is used as the row vector to construct the i-th fully polarized jammer transmitting signal S i The following formula can be satisfied:

[0042]

[0043] Among them, N s represents the i-th phase coded signal s i The number of code elements included.

[0044] S103, iteratively solving the transmission signal design model of the jammer to generate a fully polarized jamming waveform for the fully polarized radar.

[0045] Exemplarily, based on the optimization algorithm, the initial interference transmission signal s0, the convergence threshold ε, and the objective function f can be set, and the transmission signal design model of the jammer can be iteratively solved to generate a fully polarized interference waveform for the fully polarized radar.

[0046] According to the method provided by the present invention, the restored radar angular domain signal is polarized modulated by the polarization scattering matrix, and the constructed jammer transmission signal design model is solved, so that the generation of a fully polarized interference waveform can be achieved, thereby avoiding the problem that a single-polarized interference signal is easily identified, and improving the interference capability of a fully polarized radar. Furthermore, based on the optimization algorithm, the transmission signal design model is solved, and a highly accurate fully polarized interference waveform can be obtained with a lower computational complexity.

[0047] Figure 2 The flowchart shown is an implementation flow chart of an iterative solution method for a transmission signal design model provided by an embodiment of the present invention. As an example but not a limitation, the iterative solution method can be a possible specific implementation of step S103 in the above-mentioned waveform generation method. The iterative solution method can include steps S201-S203, and each step is described below.

[0048] S201, solving the interference transmission signal after the (l+1)th round of iteration according to the interference transmission signal after the lth round of iteration and the diagonal matrix.

[0049] Exemplarily, l is a non-negative integer, and the interference transmission signal after the 0th round of iteration is a preset initial interference transmission signal.

[0050] In a possible implementation manner, the interference transmission signal after the (1+1)th iteration may be solved based on the interference signal update model.

[0051] Exemplarily, the interference signal update model may satisfy the following formula:

[0052] s l+1 =-exp(j arg(2(G-λ max (G)I)s l ))

[0053] Among them, s l+1 is the interference transmission signal after the l+1th iteration, j is the imaginary unit, G is the diagonal matrix, λ max is the maximum eigenvalue of the diagonal matrix, I is the unit matrix, s l is the interference transmission signal after the lth round of iteration.

[0054] In one example, the diagonal matrix may be a matrix having the ith quadratic matrix as the ith element on the main diagonal.

[0055] Exemplarily, the diagonal matrix may satisfy the following formula:

[0056] G=diag([Q1,...,Q N ])

[0057] Among them, Q iis the i-th quadratic matrix.

[0058] Exemplarily, the i-th quadratic matrix may satisfy the following formula:

[0059]

[0060] Among them, Q i is the i-th quadratic matrix, i=1,...,N, N is the number of jammer transmitted signals, I is the unit matrix, X is the two-way polarization signal, represents the Kronecker product, t i is the simulated interference polarization scattering vector of the jammer’s i-th transmitting channel, and M is the full polarization radar array response matrix.

[0061] S202, determining whether the (l+1)th judgment value is greater than a convergence threshold.

[0062] In one example, if the l+1th determination value is greater than the convergence threshold, it means that the interference transmission signal after the l+1th iteration does not meet the requirement, and l=l+1 can be set to perform step S201 to continue iteration.

[0063] Exemplarily, the l+1th judgment value is the absolute value of the difference between the l+1th objective function value and the lth objective function value, the l+1th objective function value is the objective function value of the interference transmission signal after the l+1th round of iteration, and the lth objective function value is the objective function value of the interference transmission signal after the lth round of iteration.

[0064] Optionally, whether the l+1th decision value is greater than the convergence threshold may be determined by determining whether the l+1th decision value satisfies the constraint of the following formula:

[0065] |f(s l )-f(s l+1 )∣≤∈

[0066] Among them, f(s l ) is the lth objective function value, f(s l+1 ) is the l+1th objective function value.

[0067] In one example, if the (l+1)th determination value is less than or equal to the convergence threshold, step S203 may be performed.

[0068] S203: Use the interference transmission signal after the (l+1)th round of iteration as the full-polarization interference signal waveform.

[0069] By solving the transmission signal design model based on the optimization algorithm, a highly accurate full-polarization interference waveform can be obtained with lower computational complexity.

[0070] Figure 3The structure diagram of a jammer provided by an embodiment of the present invention is shown. As an example but not limitation, the jammer 300 may include a received signal processing unit 310 , a model adaptive unit 320 , and an iterative solution unit 330 .

[0071] In a possible implementation, the receiving signal processing unit 310 is used to multiply the receiving beam weight with the receiving signal to recover the radar angular domain signal to obtain two polarization signals, wherein the receiving signal is transmitted by a fully polarized radar; the model adaptation unit 320 is used to determine the transmission signal design model of the jammer according to the fully polarized radar array response matrix, the fully polarized jammer transmission signal, the two polarization signals and the simulated polarization scattering matrix; the iterative solution unit 330 is used to iteratively solve the transmission signal design model of the jammer to generate a fully polarized interference signal waveform for the fully polarized radar.

[0072] In one example, the transmission signal design model of the jammer satisfies the following formula:

[0073]

[0074] st|s i |=1,i=1,...,N

[0075] Among them, s represents the interference transmission signal, β i is the gain and phase information of the i-th transmission channel of the jammer, N is the number of signals transmitted by the jammer, I is the unit array, X is the two-way polarization signal, represents the Kronecker product, t i is the simulated interference polarization scattering vector of the jammer’s ith transmission channel, M is the full polarization radar array response matrix, and s Ji =vec(S i ), s i is the i-th interference transmission signal of the jammer.

[0076] In one example, the iterative solution unit is specifically used to:

[0077] Solve the interference transmission signal after the l+1th round of iteration according to the interference transmission signal after the lth round of iteration and the diagonal matrix, where l is a non-negative integer, and the interference transmission signal after the 0th round of iteration is a preset initial interference transmission signal;

[0078] Determine whether the l+1th judgment value is greater than the convergence threshold, wherein the l+1th judgment value is the absolute value of the difference between the l+1th objective function value and the lth objective function value, the l+1th objective function value is the objective function value of the interference transmission signal after the l+1th round of iteration, and the lth objective function value is the objective function value of the interference transmission signal after the lth round of iteration;

[0079] If the l+1th judgment value is greater than the convergence threshold, the interference transmission signal continues to be iterated and solved; if the l+1th judgment value is greater than or equal to the convergence threshold, the interference transmission signal after the l+1th iteration is used as the full polarization interference waveform.

[0080] In one example, the diagonal matrix is ​​a matrix with the ith quadratic matrix as the ith element on the main diagonal, and the ith quadratic matrix satisfies the following formula:

[0081]

[0082] Among them, Q i is the i-th quadratic matrix, i=1,...,N, N is the number of jammer's transmitted signals, I is the unit matrix, X is the two-way polarization signal, represents the Kronecker product, t i is the simulated interference polarization scattering vector of the jammer’s i-th transmitting channel, and M is the full polarization radar array response matrix.

[0083] In one example, the interference transmission signal after the l+1th round of iteration is determined according to the interference signal update model, and the interference signal update model satisfies the following formula:

[0084] s l+1 =-exp(j arg(2(G-λ max (G)I)s l ))

[0085] Among them, s l+1 is the interference transmission signal after the l+1th iteration, j is the imaginary unit, G is the diagonal matrix, λ max is the maximum eigenvalue of the diagonal matrix, I is the unit matrix, s l is the interference transmission signal after the lth round of iteration.

[0086] In order to better illustrate the beneficial effects of the present invention, the following simulation experiments were carried out:

[0087] Exemplarily, the software platform for the simulation experiment can be Windows 10 Professional, 64-bit operating system, matlab r2020a. The relevant parameters can be set as follows: the number of jammer transmitting antennas is 6, the number of transmitted phase coded signal symbols is 128, and the jammer includes 2, 6 and 10 receiving antennas respectively.

[0088] In order to quantitatively analyze the deceptive jamming effect of the jammer on the full-polarization radar, the correlation coefficient can be used to describe the similarity between the target jamming transmission signal of the jammer and the actual jamming transmission signal of the jammer.

[0089] Exemplarily, the correlation coefficient may satisfy the following formula:

[0090]

[0091] Where ρ is the correlation coefficient between x and y, and E(·) represents the expectation. When the correlation coefficient is 1, x and y are exactly the same, and when the correlation coefficient is 0, x and y are unrelated.

[0092] Under the above simulation conditions, the correlation coefficient between the signal actually received by the full polarization radar and the interference transmission signal of the jammer, and the correlation coefficient between the polarization scattering matrix of the full polarization radar received signal and the polarization scattering matrix simulated by the jammer are shown in Table 1 below.

[0093] Table 1

[0094]

[0095] Referring to Table 1, it can be seen that when the number of jammer transmitting antennas is different, the correlation coefficients of the real and imaginary parts of the signals are close to 1, and the correlation coefficient of the polarization scattering matrix is ​​also close to 1. The jammer transmitting signal is highly deceptive, indicating that the method provided by this invention can generate a fully polarized interference signal waveform that is not easily identified.

[0096] Therefore, according to the method provided by the present invention, the restored radar angular domain signal is polarized modulated by a simulated polarization scattering matrix, and the constructed jammer transmission signal model is solved by an optimization algorithm, so that the generation of a fully polarized interference waveform can be achieved, thereby avoiding the problem that a single-polarization interference signal is easily identified and improving the interference capability against a fully polarized radar.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For the part that is not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

Claims

1. A method for generating full polarization precise interference waveform based on constant modulus constraint, characterized in that: Applied to a jammer, the method comprises: Multiplying the receiving beam weight with the receiving signal to recover the radar angular domain signal to obtain two polarization signals, wherein the receiving signal is transmitted by a fully polarized radar; According to the full polarization radar array response matrix, the full polarization jammer transmission signal and the two polarization signals, the two polarization signals are polarization modulated by using the polarization scattering matrix to determine the jammer transmission signal design model; The transmission signal design model of the jammer is iteratively solved to generate a fully polarized jamming waveform for the fully polarized radar.

2. The method according to claim 1, characterized in that The transmission signal design model of the jammer satisfies the following formula: st|si|=1,i=1,...,N Among them, s represents the interference transmission signal, β i is the gain and phase information of the i-th transmission channel of the jammer, N is the number of transmission signals of the jammer, I is the unit matrix, X is the two-path polarization signal, represents the Kronecker product, ti is the simulated interference polarization scattering vector of the i-th transmission channel of the jammer, M is the full polarization radar array response matrix, sJi=vec(Si), si is the i-th interference transmission signal of the jammer.

3. The method according to claim 1, characterized in that The iterative solution of the transmission signal design model of the jammer to generate a fully polarized jamming signal waveform for the fully polarized radar includes: Solve the interference transmission signal after the l+1th round of iteration according to the interference transmission signal after the lth round of iteration and the diagonal matrix, where l is a non-negative integer, and the interference transmission signal after the 0th round of iteration is a preset initial interference transmission signal; Determine whether the l+1th judgment value is greater than the convergence threshold, wherein the l+1th judgment value is the absolute value of the difference between the l+1th objective function value and the lth objective function value, the l+1th objective function value is the objective function value of the interference transmission signal after the l+1th round of iteration, and the lth objective function value is the objective function value of the interference transmission signal after the lth round of iteration; If the l+1th judgment value is greater than the convergence threshold, the interference transmission signal continues to be iterated and solved; if the l+1th judgment value is less than or equal to the convergence threshold, the interference transmission signal after the l+1th iteration is used as the full polarization interference waveform.

4. The method according to claim 3, characterized in that: The diagonal matrix is ​​a matrix with the ith quadratic matrix as the ith element on the main diagonal, and the ith quadratic matrix satisfies the following formula: Wherein, Qi is the i-th quadratic matrix, i=1,...,N, N is the number of transmitted signals of the jammer, I is the unit matrix, X is the two polarization signals, represents the Kronecker product, ti is the simulated interference polarization scattering vector of the i-th transmission channel of the jammer, and M is the full polarization radar array response matrix.

5. The method according to claim 3, characterized in that: The interference transmission signal after the (l+1)th iteration is determined according to the interference signal update model, and the interference signal update model satisfies the following formula: sl+1=-exp ( jarg(2 ( G-λmax ( G ) I ) sl)) Among them, sl+1 is the interference transmission signal after the l+1th round of iteration, j is an imaginary unit, G is the diagonal matrix, λmax is the maximum eigenvalue of the diagonal matrix, I is the unit matrix, and sl is the interference transmission signal after the lth round of iteration.

6. A jammer, characterized in that: include: A receiving signal processing unit, the receiving signal processing unit is used to multiply the receiving beam weight with the receiving signal to recover the radar angle domain signal to obtain two polarization signals, wherein the receiving signal is transmitted by a fully polarized radar; The model adaptive unit performs polarization modulation on the two polarization signals by using a polarization scattering matrix according to the full polarization radar array response matrix, the full polarization jammer transmission signal and the two polarization signals, and determines a transmission signal design model of the jammer; An iterative solution unit is used to iteratively solve the transmission signal design model of the jammer to generate a fully polarized interference waveform for the fully polarized radar.

7. The jammer according to claim 6, characterized in that: The transmission signal design model of the jammer satisfies the following formula: st|si|=1,i=1,...,N Among them, s represents the interference transmission signal, β i is the gain and phase information of the i-th transmission channel of the jammer, N is the total number of transmission channels of the jammer, I is the unit array, X is the two polarization signals, represents the Kronecker product, ti is the simulated interference polarization scattering vector of the i-th transmission channel of the jammer, M is the full polarization radar array response matrix, sJi=vec(Si), si is the i-th interference transmission signal of the jammer.

8. The jammer according to claim 6, characterized in that: The iterative solution unit is specifically used for: Solve the interference transmission signal after the l+1th round of iteration according to the interference transmission signal after the lth round of iteration and the diagonal matrix, where l is a non-negative integer, and the interference transmission signal after the 0th round of iteration is a preset initial interference transmission signal; Determine whether the l+1th judgment value is greater than the convergence threshold, wherein the l+1th judgment value is the absolute value of the difference between the l+1th objective function value and the lth objective function value, the l+1th objective function value is the objective function value of the interference transmission signal after the l+1th round of iteration, and the lth objective function value is the objective function value of the interference transmission signal after the lth round of iteration; If the l+1th judgment value is greater than the convergence threshold, the interference transmission signal continues to be iterated and solved; if the l+1th judgment value is greater than or equal to the convergence threshold, the interference transmission signal after the l+1th round of iteration is used as the full polarization interference waveform.

9. The jammer according to claim 8, characterized in that: The diagonal matrix is ​​a matrix with the ith quadratic matrix as the ith element on the main diagonal, and the ith quadratic matrix satisfies the following formula: Wherein, Qi is the i-th quadratic matrix, i=1,...,N, N is the number of transmitted signals of the jammer, I is the unit matrix, X is the two polarization signals, represents the Kronecker product, ti is the simulated interference polarization scattering vector of the i-th transmission channel of the jammer, and M is the full polarization radar array response matrix.

10. The jammer according to claim 8, characterized in that: The interference transmission signal after the (l+1)th iteration is determined according to the interference signal update model, and the interference signal update model satisfies the following formula: sl+1=-exp ( jarg(2 ( G-λmax ( G ) I ) sl)) Among them, sl+1 is the interference transmission signal after the l+1th round of iteration, j is an imaginary unit, G is the diagonal matrix, λmax is the maximum eigenvalue of the diagonal matrix, I is the unit matrix, and sl is the interference transmission signal after the lth round of iteration.

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