A simulation system and implementation method for generating arbitrary polarization targets and interference signals.

Abstract

This invention discloses a simulation system and implementation method for generating arbitrary polarization targets and interference signals. The system includes a display and control platform for data display and system control; a signal receiving and transmitting module comprising a signal receiving module for collecting space microwave signals and a signal transmitting module for radiating signals into space; and a signal processing module comprising a frequency conversion component for up-conversion and down-conversion of the signal, a linear transmitting component for power amplification of the transmitted signal, a digital component for signal processing and baseband signal generation, and a switch selection module for selecting the transmitted signal output. This invention integrates target simulation and interference simulation, ensuring amplitude and phase consistency between channels through a high-precision amplitude and phase correction method, thereby achieving polarization measurement of the received signal and polarization synthesis of the transmitted signal. Furthermore, this invention allows selection of the type and pattern of the transmitted signal via a switch.

Description

Technical Field

[0001] This invention relates to the field of radar target simulation technology, and in particular to a simulation system and method for generating arbitrary polarization targets and interference signals. Background Technology

[0002] Radar target simulation systems simulate the echoes of various stationary and moving targets based on their reflection characteristics. They are core equipment for the overall debugging and performance testing of various radar systems, significantly reducing the cost and time of radar testing and verification. They have important applications in radar target guidance, weapon guidance, remote sensing imaging, and meteorological detection. Radar jamming simulation systems can simulate various radar jamming signals in real combat environments, mainly including suppression and deception jamming. They can test the radar's anti-jamming capabilities and are an important component of radar system functional testing.

[0003] Traditional target or jamming simulation systems generate analog signals with a single polarization characteristic, primarily determined by the system's transmitting antenna. However, in real-world scenarios, the electromagnetic waves emitted by radar interact with target objects, causing their polarization to rotate in different directions, thus altering the polarization characteristics of the echo returning to the radar receiver. Similarly, in adversarial environments, radar and jammers are typically in direct line-of-sight situations, resulting in various polarization characteristics of the jamming signal entering the radar receiver. If the jammer emits a conventional jamming signal, the polarization characteristics entering the radar receiver are primarily determined by its transmitting antenna. If the jammer emits a variable-polarization or cross-polarization jamming signal, the polarization characteristics of the jamming signal entering the radar receiver are variable. Therefore, to accurately simulate target echoes or jamming in real-world environments, radar target or jamming simulation systems need to possess the capability for arbitrary polarization transmission. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology. To achieve the above objective, a simulation system and implementation method for generating arbitrary polarization targets and interference signals are adopted to solve the problems mentioned in the background technology.

[0005] A simulation system for generating arbitrary polarization targets and interference signals, comprising:

[0006] The display and control platform is used for data display and system control;

[0007] The signal receiving module includes a signal receiving module for collecting space microwave signals and a signal transmitting module for radiating transmitted signals into space.

[0008] The signal processing module includes a frequency conversion component for up-conversion and down-conversion of the signal, a linear transmission component for power amplification of the transmitted signal, a digital component for digital processing of the signal and generation of baseband signal, and a switch selection module for output selection of the transmitted signal.

[0009] As a further aspect of the present invention, the signal receiving module employs a common-phase-center orthogonal dual-polarization receiving antenna.

[0010] As a further aspect of the present invention: the signal transmitting module consists of at least two orthogonal dual-polarized antennas.

[0011] As a further aspect of the present invention: the frequency conversion component includes a lower frequency conversion channel, an upper frequency conversion channel, and a frequency synthesizer module.

[0012] As a further aspect of the present invention: the transmitting component is a dual-channel linear power amplifier module.

[0013] As a further aspect of the present invention: the digital component is provided with dual channels, and the digital component is capable of digitizing the received signal, digital down-converting the frequency, and measuring parameters.

[0014] Based on preset interference or target simulation settings, baseband signals are generated and digitally up-converted; baseband correction signals are generated and digitally up-converted.

[0015] Another technical solution: A method for implementing a simulation system for generating arbitrary polarization targets and interference signals, employing a simulation system for generating arbitrary polarization targets and interference signals as described in any of the above claims, the specific steps of which include:

[0016] Step S1: First, a high-precision amplitude and phase correction scheme is designed to correct the two receiving channels and the two transmitting channels.

[0017] Step S2: After calibration, the signal is received through the signal receiving module of the signal receiving module. The received signal is down-converted by the frequency conversion module and then sent to the array component for digitization, parameter measurement, and polarization measurement. The measurement results are sent to the display and control platform for display.

[0018] Step S3: The operator selects the interference pattern or target simulation parameters based on the measurement results and sets the parameters to be sent to the digital component;

[0019] Step S4: The digital component generates the corresponding baseband signal according to the set parameters. After digital-to-analog conversion and filtering, the baseband signal is sent to the frequency conversion component for up-conversion and amplification into a radio frequency signal.

[0020] Step S5: The radio frequency signal is sent to the transmitting component for power amplification. The amplified signal is selected by a switch so that the two transmitting signals are sent to the signal transmitting module at the same time to radiate towards the target, and the corresponding interference or target simulation signal is synthesized at the target.

[0021] As a further aspect of the present invention: the corresponding interference or target simulation signal includes a composite target plus interference simulation signal, an arbitrarily polarized target or interference simulation signal, and a cross-interference or variable polarization simulation signal.

[0022] As a further aspect of the present invention: the high-precision transmission channel amplitude and phase correction scheme is specifically designed as follows:

[0023] Step S1: Select one receiving channel as the reference, and send one signal from the two transmitting channels in a time-division manner to the reference receiving channel;

[0024] Step S2: The correction signal is amplified and frequency-converted in the receiving channel and then sent to the digital component. After the signal is digitized and digitally down-converted in the digital component, the relative amplitude and phase difference of the two transmitted signals are measured and recorded.

[0025] Step S3: In actual operation, phase and amplitude compensation are performed through digital components to correct the amplitude and phase of the two transmitted signals;

[0026] After calibration, the phase and amplitude of the two transmission channels can be configured using digital components to synthesize arbitrary polarization interference signals.

[0027] As a further aspect of the present invention: the high-precision receiving channel amplitude and phase correction scheme is specifically designed as follows:

[0028] Step S1: Select one transmitting channel as the reference, and use two receiving channels to receive the correction signal coupled by the transmitting channel in a time-division manner;

[0029] Step S2: The correction signal is amplified and frequency-converted in the receiving channel and then sent to the digital component. After the signal is digitized and digitally down-converted in the digital component, the relative amplitude and phase difference of the two received signals are measured and recorded.

[0030] Step S3: In actual operation, phase and amplitude compensation are performed through digital components to correct the amplitude and phase of the two received signals.

[0031] After calibration, the phase and amplitude of the two receiving channels can be configured using digital components, thus preparing for polarization measurement.

[0032] As a further aspect of the present invention: the polarization measurement and arbitrary polarization synthesis technique specifically includes:

[0033] Polarization measurement technology: The phase-amplitude measurement method is adopted. By using a pair of polarized orthogonal antennas with equal phase centers, the amplitude ratio and phase difference of the signals received by the two antennas are measured to indirectly determine the polarization direction of the radar wave.

[0034] Arbitrary polarization synthesis technique: By modulating the amplitude and phase of the transmission channel, arbitrary polarization directions can be synthesized.

[0035] Compared with the prior art, the present invention has the following technical advantages:

[0036] Using the above technical solution, two amplitude- and phase-modulated signals are transmitted through an orthogonal dual-polarized transmitting antenna, synthesizing a simulated signal with arbitrary polarization in space. The key feature of this invention is its ability to integrate target simulation and interference simulation into a single design. Furthermore, by employing a high-precision amplitude-phase correction method to correct the amplitude and phase of the transmitting and receiving channels, consistency in amplitude and phase between the two receiving channels can be ensured. Therefore, the "phase-amplitude" measurement method can be used to measure the polarization direction of the radar wave. Simultaneously, the high-precision amplitude-phase correction method guarantees consistency in amplitude and phase between the two transmitting channels. Thus, by controlling the amplitude and phase of the two transmitted signals, the two transmitted signals can be synthesized into interference signals with arbitrary polarization and cross-polarization in space. Finally, this invention also allows for switching to select the type and pattern of the transmitted signal, enabling the transmission of both conventional interference signals and target simulation signals. Attached Figure Description

[0037] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0038] Figure 1 This is a schematic diagram of the composition of the entire simulation system according to an embodiment of this application;

[0039] Figure 2 This is a schematic diagram illustrating the working principle of the simulation system according to an embodiment of this application.

[0040] Figure 3 This is a schematic diagram illustrating the combination and function of the switch selection module according to an embodiment of this application;

[0041] Figure 4 This is a schematic diagram illustrating the selection of an arbitrary polarization interference switch according to an embodiment of this application.

[0042] Figure 5 This is a schematic diagram illustrating the orthogonal polarization of the two signals in an embodiment of this application.

[0043] Figure 6 This is a schematic diagram illustrating the same polarization of the two signals in an embodiment of this application.

[0044] Figure 7 This is a flowchart illustrating the transmission channel correction process according to an embodiment of this application.

[0045] Figure 8 This is a flowchart illustrating the receiving channel calibration process according to an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please refer to Figure 1 In this embodiment of the invention, a simulation system for generating arbitrary polarization targets and interference signals includes:

[0048] The display and control platform is used for data display and system control;

[0049] The signal receiving module includes a signal receiving module for collecting space microwave signals and a signal transmitting module for radiating transmitted signals into space.

[0050] In this embodiment, the signal receiving module adopts a dual-polarized receiving antenna with a common phase center, which can complete the function of collecting space microwave signals.

[0051] In this embodiment, the signal transmitting module consists of at least two orthogonal dual-polarized antennas. Specifically, the transmitting antenna mainly consists of two orthogonal dual-polarized horn antennas, primarily performing the spatial radiation function of the transmitted signal.

[0052] The signal processing module includes a frequency conversion component for up-conversion and down-conversion of the signal, a linear transmission component for power amplification of the transmitted signal, a digital component for digital processing of the signal and generation of baseband signal, and a switch selection module for output selection of the transmitted signal.

[0053] In a specific implementation, the signal processing module is housed in the equipment chassis, which is the core of the entire system and contains frequency conversion components, transmission components, digital components, and a switch selection module.

[0054] In this embodiment, the frequency conversion component includes a lower frequency conversion channel, an upper frequency conversion channel, and a frequency synthesizer module;

[0055] Specifically, the frequency converter module internally includes two down-conversion channels, two up-conversion channels, and a frequency synthesizer module. It performs front-end amplification and down-conversion of the received signal and up-conversion and amplification of the transmitted signal, and includes a frequency synthesizer capable of outputting the reference clock and sampling clock required by the digital components.

[0056] In this embodiment, the transmitting component is a dual-channel linear power amplifier module, specifically used to perform linear power amplification of the transmitted signal.

[0057] In this embodiment, the digital component is provided with dual channels, and the digital component is capable of digitizing the received signal, digital down-converting the frequency, and measuring parameters.

[0058] Based on preset interference or target simulation settings, baseband signals are generated and digitally up-converted; baseband correction signals are generated and digitally up-converted.

[0059] Specifically, the digital component contains dual-channel AD and DA converters to perform digitization, digital down-conversion, and parameter measurement of the received signal; it also performs baseband signal generation and digital up-conversion based on parameters set according to interference or target simulation; and it performs baseband correction signal generation and digital up-conversion.

[0060] Specifically, the switch selection module is composed of a combination of switches to select the output of two transmitted signals to two orthogonal dual-polarized antennas.

[0061] Another technical solution: A method for implementing a simulation system for generating arbitrary polarization targets and interference signals, employing a simulation system for generating arbitrary polarization targets and interference signals as described in any of the above claims, the specific steps of which include:

[0062] Step S1: First, a high-precision amplitude and phase correction scheme is designed to correct the two receiving channels and the two transmitting channels.

[0063] Step S2: After calibration, the signal is received through the signal receiving module of the signal receiving module. The received signal is down-converted by the frequency conversion module and then sent to the array component for digitization, parameter measurement, and polarization measurement. The measurement results are sent to the display and control platform for display.

[0064] Step S3: The operator selects the interference pattern or target simulation parameters based on the measurement results and sets the parameters to be sent to the digital component;

[0065] Step S4: The digital component generates the corresponding baseband signal according to the set parameters. After digital-to-analog conversion and filtering, the baseband signal is sent to the frequency conversion component for up-conversion and amplification into a radio frequency signal.

[0066] Step S5: The radio frequency signal is sent to the transmitting component for power amplification. The amplified signal is selected by a switch so that the two transmitting signals are sent to the signal transmitting module at the same time to radiate towards the target, and the corresponding interference or target simulation signal is synthesized at the target.

[0067] In this embodiment, the corresponding interference or target simulation signal includes a composite target plus interference simulation signal, an arbitrary polarization target or interference simulation signal, and a dual-point source cross-interference or variable polarization simulation signal.

[0068] Arbitrary polarization interference:

[0069] like Figure 2 As shown, the diagram illustrates the working principle of the simulation system.

[0070] like Figure 3 As shown in the figure, the diagram illustrates the transmit port switch selection combination and its functional implementation.

[0071] Upon powering on the analog system, the first step is to perform amplitude and phase calibration of the receiving and transmitting channels. After calibration, the receiving antenna receives the signal, and the test results are displayed on the control panel. The operator then selects the arbitrary polarization interference mode. After the polarization interference mode is selected, the digital components generate the control timing and polarization control phase and amplitude codes for the two transmitting channels, simultaneously generating two baseband interference signals. The baseband interference signal is digitally up-converted to an intermediate frequency (IF) signal after phase and amplitude modulation. This IF signal is then sent to the frequency converter via an RF cable for up-conversion and amplification, becoming an RF signal. The RF signal is then sent to a linear power amplifier via an RF cable for power amplification. The amplified signal is selected by a switch, allowing both transmitting signals to be simultaneously fed into the two polarization input ports of a dual-polarized antenna (horizontal polarization H and water-pool polarization V). The signals emitted by the dual-polarized transmitting antenna are spatially synthesized into arbitrary polarization interference and radiated towards the target.

[0072] like Figure 4 As shown in the figure, this is a schematic diagram of the selection of arbitrary polarization interference switch.

[0073] Conventional interference simulation:

[0074] When the analog system is used as a conventional jammer, the receiving antenna receives the radar signal and sends it to the receiving channel through the radio frequency cable. The radio frequency signal is first sent to the receiving front end in the frequency conversion module, amplified, and then sent to be mixed into an intermediate frequency signal. The intermediate frequency signal is first sent to the signal processing module for digitization, digital down-conversion, and parameter measurement. The result of the parameter measurement is sent to the display and control computer for display.

[0075] Based on the parameter measurement results, the operator selects the corresponding interference pattern and sets the interference parameters on the display and control interface. The interference parameters are sent to the digital component, which generates the interference signal, performs digital up-conversion and digital-to-analog conversion according to the set parameters, and then converts it into an intermediate frequency signal. The intermediate frequency interference signal is sent to the frequency conversion module for filtering and up-conversion through the radio frequency cable, and then sent to the power amplifier module for power amplification. Finally, it is radiated towards the target through the transmitting antenna.

[0076] Target simulation:

[0077] When the simulation system is used as a radar target simulator, the operator sets parameters on the display and control interface. Signal parameters are sent to the digital component, which, based on the set parameters (samples from the receiving channel are needed for target simulation), generates the radar target signal, performs digital up-conversion and analog-to-digital conversion, converting it into an intermediate frequency (IF) signal. The IF interference signal is then sent to the frequency converter module for filtering and up-conversion via an RF cable, and then to the power amplifier module for power amplification. A switch allows selection of the polarization pattern of each signal output from a specific antenna. Finally, the signal is radiated into the air through the transmitting antenna.

[0078] Use of multiple functions:

[0079] like Figure 2 As shown, the diagram illustrates the system's working principle.

[0080] This simulation system can control two independent orthogonally polarized transmission channels to generate signals of arbitrary polarization. It can also generate two separate signals, one for target echo simulation and the other for jamming simulation. Using a switch after the power amplifier, the two signals can be either co-polarized or orthogonally polarized. By controlling the attenuation of the two transmission channels through the signal processing module, the output power of each channel can be independently adjusted (i.e., the signal-to-interference ratio is adjustable when simultaneously generating radar target signals and suppression / deception jamming signals).

[0081] like Figure 5 and Figure 6 As shown, Figure 5 This diagram illustrates the orthogonal polarization of two signals and the co-polarization of two signals.

[0082] To precisely control the amplitude and phase of the two transmit and receive signals, a high-precision amplitude and phase correction scheme needs to be designed first. The specific high-precision amplitude and phase correction scheme for the transmit channel is as follows:

[0083] Step S1: Select one receiving channel as the reference, and send one signal from the two transmitting channels in a time-division manner to the reference receiving channel;

[0084] Step S2: The correction signal is amplified and frequency-converted in the receiving channel and then sent to the digital component. After the signal is digitized and digitally down-converted in the digital component, the relative amplitude and phase difference of the two transmitted signals are measured and recorded.

[0085] Step S3: In actual operation, phase and amplitude compensation are performed through digital components to correct the amplitude and phase of the two transmitted signals;

[0086] After calibration, the phase and amplitude of the two transmission channels can be configured using digital components to synthesize arbitrary polarization interference signals.

[0087] like Figure 7 As shown, the diagram is a flowchart of the transmission channel calibration process.

[0088] The high-precision receiving channel amplitude and phase correction scheme is as follows:

[0089] Step S1: Select one transmitting channel as the reference, and use two receiving channels to receive the correction signal coupled by the transmitting channel in a time-division manner;

[0090] Step S2: The correction signal is amplified and frequency-converted in the receiving channel and then sent to the digital component. After the signal is digitized and digitally down-converted in the digital component, the relative amplitude and phase difference of the two received signals are measured and recorded.

[0091] Step S3: In actual operation, phase and amplitude compensation are performed through digital components to correct the amplitude and phase of the two received signals.

[0092] After calibration, the phase and amplitude of the two receiving channels can be configured using digital components, thus preparing for polarization measurement.

[0093] like Figure 8 As shown, the diagram is a flowchart of the receive channel calibration process.

[0094] In this embodiment, the polarization measurement and arbitrary polarization synthesis techniques are specifically as follows:

[0095] Polarization measurement technique: The phase-amplitude measurement method is used. By using a pair of polarized orthogonal antennas with equal phase centers, the amplitude ratio and phase difference of the signals received by the two antennas are measured to indirectly determine the polarization direction of the radar wave. The specific theoretical explanation is as follows:

[0096] According to the polarization electromagnetic theory, a monochromatic wave of any polarization form can be decomposed into two orthogonal polarization components. The polarization direction of the radar wave is indirectly determined by measuring the amplitude ratio and phase difference of the signals received by the two antennas through a pair of polarized orthogonal antennas with equal phase centers using the "phase-amplitude" measurement method.

[0097] Assuming the radar signal is a linear frequency modulated signal with constant intrapulse polarization, under left- or right-handed rotational polarization, the signals received by the two antennas are:

[0098]

[0099]

[0100] Where: m A The combined coefficients for radar power, radar antenna, and spatial propagation attenuation are equal for both polarization channels, n. R (t) and n L (t) represents the received noise from the two channels, respectively. Let The radar wave polarization state is then determined by The unique characteristic is that the polarization detection parameters of some radar polarized waves are shown in Table 1.

[0101] Table 1 Radar Wave Polarization Detection Parameters

[0102]

[0103] As shown in Table 1, for a linearly polarized radar in any direction, the amplitudes of the signals received by the two circularly polarized antennas are equal, and the polarization direction of the radar wave is 50% of the phase difference between the signals received by the two antennas. Due to the influence of the relationship between the radar antenna elevation and the reconnaissance antenna elevation, the radar wave polarization direction measured by the reconnaissance system is not completely equivalent to the radar's operating polarization, and needs to be comprehensively determined in conjunction with certain prior knowledge.

[0104] Arbitrary polarization synthesis technique: By modulating the amplitude and phase of the transmission channel, arbitrary polarization directions can be synthesized. The specific theoretical explanation is as follows:

[0105] There are three types of electromagnetic wave polarization: linear polarization, circular polarization, and elliptic polarization. Polarized waves can all be considered as the synthesis of two linearly polarized waves of the same frequency in space. This project uses two orthogonal linear polarization directions to synthesize an arbitrary polarization direction. Assume that the two linearly polarized waves propagate along the positive Z-direction, one with its polarization orientation in the X-direction, and the other in the Y-direction. The vectors for horizontally and vertically polarized electromagnetic waves are:

[0106]

[0107]

[0108] The electric field of the composite wave is:

[0109]

[0110] Therefore, at any given point in space, the magnitude and direction of the electric field intensity vector of the composite wave may change with time; this phenomenon is called electromagnetic wave polarization. By correcting the amplitude and phase of the transmission channel, the phase and amplitude of the two electric field components can be made equal, and the composite electric field is:

[0111]

[0112] The angle between the direction of the combined electric field and the two components is:

[0113]

[0114] According to the above formula, after the transmission channel is corrected, the two electric field components have equal amplitude and equal phase.

[0115] If direct synthesis is performed at this point, the synthesized polarization direction will be 45° oblique polarization. However, by modulating the amplitude and phase of the transmission channel, any polarization direction can be synthesized.

[0116] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents, all of which should be included within the scope of protection of the invention.

Claims

1. A simulation system for generating arbitrary polarization targets and interference signals, characterized in that, include: The display and control platform is used for data display and system control; The signal receiving module includes a signal receiving module for collecting space microwave signals and a signal transmitting module for radiating transmitted signals into space. The signal processing module includes a frequency conversion component for up-conversion and down-conversion of the signal, a linear transmission component for power amplification of the transmitted signal, a digital component for digital processing of the signal and generation of baseband signal, and a switch selection module for output selection of the transmitted signal. The signal receiving module uses a common-phase-center orthogonal dual-polarization receiving antenna. The signal transmitting module consists of at least two orthogonal dual-polarized antennas; The digital component is equipped with dual channels and is capable of digitizing the received signal, digital down-converting the frequency, and measuring parameters. Baseband signal generation and digital up-conversion are performed based on preset interference or target simulation parameters. And to generate baseband correction signals and perform digital upconversion; The switch selection module is composed of a combination of switches, which completes the selection of the output of the transmitted signal to the orthogonal dual-polarized antenna.

2. The simulation system for generating arbitrary polarization targets and interference signals according to claim 1, characterized in that, The frequency conversion component includes a lower frequency conversion channel, an upper frequency conversion channel, and a frequency synthesizer module.

3. The simulation system for generating arbitrary polarization targets and interference signals according to claim 1, characterized in that, The transmitting component is a dual-channel linear power amplifier module.

4. A method for implementing a simulation system that generates arbitrary polarization targets and interference signals, characterized in that, The specific steps of the simulation system for generating arbitrary polarization targets and interference signals as described in claims 1 to 3 include: Step S1: First, a high-precision amplitude and phase correction scheme is designed to perform amplitude and phase correction on the two receiving channels and the two transmitting channels respectively; Step S2: After calibration, the signal is received through the signal receiving module of the signal receiving module. The received signal is down-converted by the frequency conversion module and then sent to the digital component for digitization, parameter measurement, and polarization measurement. The measurement results are sent to the display and control platform for display. Step S3: The operator selects the interference pattern or target simulation parameters based on the measurement results and sets the parameters to be sent to the digital component; Step S4: The digital component generates the corresponding baseband signal according to the set parameters. After digital-to-analog conversion and filtering, the baseband signal is sent to the frequency conversion component for up-conversion and amplification into a radio frequency signal. Step S5: The radio frequency signal is sent to the transmitting component for power amplification. The amplified signal is selected by a switch so that the two transmitting signals are sent to the signal transmitting module at the same time to radiate towards the target, and the corresponding interference or target simulation signal is synthesized at the target.

5. The method for implementing a simulation system for generating arbitrary polarization targets and interference signals according to claim 4, characterized in that, The corresponding interference or target simulation signals include composite target-plus-interference simulation signals, target or interference simulation signals of arbitrary polarization, and cross-interference or variable polarization simulation signals.

6. The method for implementing a simulation system for generating arbitrary polarization targets and interference signals according to claim 4, characterized in that, The high-precision amplitude and phase correction scheme for the transmission channel is specifically designed as follows: Step S1: Select one receiving channel as the reference, and send one signal from the two transmitting channels in a time-division manner to the reference receiving channel; Step S2: The correction signal is amplified and frequency-converted in the receiving channel and then sent to the digital component. After the signal is digitized and digitally down-converted in the digital component, the relative amplitude and phase difference of the two transmitted signals are measured and recorded. Step S3: In actual operation, phase and amplitude compensation are performed through digital components to correct the amplitude and phase of the two transmitted signals; After calibration, the phase and amplitude of the two transmission channels can be configured using digital components to synthesize arbitrary polarization interference signals.

7. The method for implementing a simulation system for generating arbitrary polarization targets and interference signals according to claim 4, characterized in that, The high-precision receiver channel amplitude and phase correction scheme is specifically designed as follows: Step S1: Select one transmitting channel as the reference, and use two receiving channels to receive the correction signal coupled by the transmitting channel in a time-division manner; Step S2: The correction signal is amplified and frequency-converted in the receiving channel and then sent to the digital component. After the signal is digitized and digitally down-converted in the digital component, the relative amplitude and phase difference of the two received signals are measured and recorded. Step S3: In actual operation, phase and amplitude compensation are performed through digital components to correct the amplitude and phase of the two received signals. After calibration, the phase and amplitude of the two receiving channels can be configured using digital components, thus preparing for polarization measurement.

8. A method for implementing an analog system for generating arbitrary polarization targets and interference signals according to any one of claims 6 or 7, characterized in that, The polarization measurement and arbitrary polarization synthesis techniques are specifically as follows: Polarization measurement technology: The phase-amplitude measurement method is adopted. By using a pair of polarized orthogonal antennas with equal phase centers, the amplitude ratio and phase difference of the signals received by the two antennas are measured to indirectly determine the polarization direction of the radar wave. Arbitrary polarization synthesis technique: By modulating the amplitude and phase of the transmission channel, arbitrary polarization directions can be synthesized.

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