A signal-level simulation method for an airborne pulse Doppler radar system

Abstract

The present application relates to a kind of airborne pulse Doppler radar system signal level simulation method, the method is established radar system three-dimensional scene by STK software, then through SystemVue software builds airborne pulse Doppler radar signal level simulation model, simultaneously by simulation scene interface model and STK software connection, read the parameter information in the parameter configuration file report of the detected aircraft target in Access association, after running machine simulation model, obtain the visualized graphic simulation result of the speed and distance of the detected aircraft target of each level processing process of airborne pulse Doppler radar signal and the detection simulation result of airborne pulse Doppler radar.The present application can make the design, application, verification of airborne pulse Doppler radar system more close to actual use scene, and greatly improve the fidelity and practicality of airborne pulse Doppler radar system simulation, provide a platform for system to carry out actual confrontation environment digital verification.

Description

Technical Field

[0001] This invention relates to the field of radar system simulation technology, and in particular to a signal-level simulation method for an airborne pulse Doppler radar system. Background Technology

[0002] Airborne pulse-Doppler radar is a crucial piece of equipment for fighter jets, enabling them to detect, track, and image various targets, providing vital support for fighter pilots in weapon control and situational awareness. Modern airborne pulse-Doppler radars, through active phased array antennas and high-performance digital signal processing systems, can perform multiple missions including air-to-air, air-to-surface, navigation, and imaging. Employing pulse-Doppler technology effectively mitigates the impact of various clutter patterns on radar detection and addresses the ambiguity in velocity and distance measurements through waveform changes. When designing or verifying radar detection performance, computer simulation is required. This involves building a signal-level simulation model and verifying it using actual radar operating parameters. Traditional verification methods often treat digital verification as merely a part of the principle design, failing to fully consider the demands of adversarial scenarios and making it difficult to completely simulate the actual signal workflow of airborne pulse-Doppler radar. The design and verification process is complex and specialized, and visualization and modularization are challenging. In recent years, with the continuous improvement of signal-level simulation methods and computer performance, electronic system-level simulation tools, represented by simulation software such as MATLAB Simulink and SystemVue, have become increasingly mature, providing powerful application tools for the full-process design and verification of airborne pulse Doppler fire control radar. Summary of the Invention

[0003] To address the problems existing in current airborne pulse Doppler radar simulation methods, this invention designs a signal-level simulation method for airborne pulse Doppler radar systems, which includes the following steps:

[0004] S1. Use STK software to build a 3D scene, add aircraft targets in the 3D scene, and edit the flight information of the aircraft targets;

[0005] S2. Add an airborne pulse-Doppler radar object to the specified aircraft target, and configure the antenna parameters, transmitter parameters, target pointing and target radar cross-sectional area of ​​the airborne pulse-Doppler radar;

[0006] S3. Establish the Access relationship between the airborne pulse Doppler radar and the detected aircraft target, and generate a parameter configuration file report;

[0007] S4. Build an airborne pulse-Doppler radar signal level simulation model in SystemVue software and configure the simulation model's running parameters;

[0008] S5. Configure the simulation scene interface model in the simulation model, and output the detected aircraft target in the Access association and the parameter information in the parameter configuration file report to the SystemVue software through the simulation scene interface model as the control parameters for signal-level simulation.

[0009] S6. Specify a certain moment in the three-dimensional scene as the signal-level simulation moment and run the airborne pulse Doppler radar signal-level simulation model according to the control parameters at that simulation moment to obtain the visualized graphical simulation results of each stage of the airborne pulse Doppler radar signal processing and the detection simulation results of the airborne pulse Doppler radar on the speed and distance of the detected aircraft target.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The airborne pulse-Doppler radar system signal-level simulation method proposed in this invention constructs a 3D scene of the radar system using STK software. After adding an airborne pulse-Doppler radar object to a specified aircraft target, establishing an Access relationship between the radar and the detected aircraft target, and generating a parameter configuration file report, a signal-level simulation model of the airborne pulse-Doppler radar is constructed using SystemVue software. Simultaneously, the simulation scene interface model is connected to STK software to read the detected aircraft target from the Access relationship and the parameter information from the parameter configuration file report. This simulates the process of receiving and processing the target echo signal by the airborne pulse-Doppler radar, while simultaneously performing unambiguous measurements of the target echo signal's distance and velocity, thus obtaining the simulation results of the airborne pulse-Doppler radar's detection of the speed and distance of the detected aircraft target. This invention enables the design, application, and verification of airborne pulse-Doppler radar systems to be closer to actual usage scenarios, and greatly improves the realism and practicality of airborne pulse-Doppler radar system simulation. It provides a platform for the digital verification of the system in actual combat environments, while simplifying the construction and configuration of airborne pulse-Doppler radar system simulation models, and realizing efficient and software-based verification of the design of airborne pulse-Doppler radar systems. Attached Figure Description

[0012] Figure 1 This is a flowchart of a signal-level simulation method for an airborne pulse Doppler radar system according to the present invention;

[0013] Figure 2 It is a side view of a 3D scene based on STK software;

[0014] Figure 3 It is a top-down view of a 3D scene based on STK software;

[0015] Figure 4This is a schematic diagram of the airborne pulse Doppler radar signal level simulation model in this invention;

[0016] Figure 5 This is the simulation result of the radar transmitter output signal waveform;

[0017] Figure 6 These are simulation results of the radar transmitter output signal spectrum;

[0018] Figure 7 This is the simulation result output by the radar receiver;

[0019] Figure 8 This is the simulation result output by the pulse compression module;

[0020] Figure 9 This is the simulation result output by the radar pulse Doppler processing module;

[0021] Figure 10 This is the simulation result output by the radar constant false alarm rate (CFAR) detection module;

[0022] Figure 11 It is a three-dimensional display result of "distance-Doppler-amplitude". Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, this invention provides a signal-level simulation method for an airborne pulse Doppler radar system based on an STK 3D scene. The specific steps of this method are as follows:

[0025] S1. Use STK (Satellite Tool Kit) software to build a 3D scene, add aircraft targets in the 3D scene, and edit the flight information of the aircraft targets in the 3D scene.

[0026] In STK software, specific target platforms such as aircraft can be added. This method uses a typical two-aircraft air combat scenario as its application scenario. The scenario includes two aircraft targets (J-1 and J-2), where J-1 is the carrier platform equipped with an airborne pulse-Doppler radar, and J-2 is the incoming detection target. In the 3D scene of STK software, the flight information of each aircraft can be edited. The flight information includes the latitude and longitude of the start and end points of the flight path, flight altitude, flight speed, flight acceleration, flight time, and turning radius, etc., forming a combat scenario in which the two aircraft are approaching each other head-on. The 3D spatial scene design is as follows: Figure 2 , Figure 3 As shown.

[0027] In the STK software, the flight path information of two aircraft targets, J-1 and J-2, can be entered by selecting points on the map. This includes the latitude and longitude of the starting and ending points of the flight path, as well as the speed, acceleration, turning radius, and flight altitude of the flight path. The flight information settings for aircraft targets J-1 and J-2 are shown in Tables 1 and 2.

[0028] Table 1 Flight Information Settings for Aircraft Target J-1

[0029]

[0030] Table 2 Flight Information Settings for Aircraft Target J-2

[0031]

[0032] S2. Add an airborne pulse-Doppler radar object to the specified aircraft target in the 3D scene, and configure the antenna parameters, transmitter parameters, target pointing and target radar cross-section (RCS) of the airborne pulse-Doppler radar.

[0033] Add the airborne pulse-Doppler radar object "AirBorneRadar" to the Antenna interface of the J-1 aircraft target, configure the radar antenna parameters, here the antenna type is set to phased array, the antenna shape is set to polygon, by setting the number of antenna elements and the element distance in the x and y directions, the system will automatically calculate the antenna aperture size and the number of radiating elements.

[0034] In the Beam Direction Provider interface, you can set the beam direction to detect the target aircraft J-2.

[0035] By editing the Radar Cross Section option in the J-2's properties, the RCS of the aircraft target can be configured according to the actual frequency or target fluctuation characteristics. Here, the type of the J-2's radar cross section is set to constant value, and its size is 13.0103 dBsm.

[0036] S3. In the STK 3D scene, establish an Access relationship for the specified aircraft target, that is, establish an Access relationship between the airborne pulse Doppler radar and the detected aircraft target, and generate the parameter configuration file report required for signal-level simulation.

[0037] At this time, a connection relationship (Access) is established between the onboard pulse-Doppler radar and the aircraft target J-2, and a corresponding parameter configuration file report (Report) is generated according to the format "STK_Radar_Rep.rst". The parameter configuration file report includes information such as range delay, propagation attenuation, and antenna gain required for SystemVue software simulation. During the actual simulation, SystemVue software will control STK to generate a Report according to the set simulation cycle through the interface module and input the relevant parameters into SystemVue to achieve signal level simulation at that moment.

[0038] S4. Build an airborne pulse-Doppler radar signal level simulation model in SystemVue software and configure the simulation model's running parameters.

[0039] Keysight's SystemVue software boasts a variety of specialized and modular development tool libraries for radar, communication, and navigation, and allows users to perform secondary development using mainstream programming languages ​​including C++, MATLAB, and Python. Its powerful graphical analysis and display capabilities have made it popular among radar R&D manufacturers and application personnel. In particular, SystemVue provides an interface with the scene simulation software STK, enabling their organic integration. This invention combines STK and SystemVue to achieve joint simulation of realistic scene motion environments with signal-level simulation models.

[0040] In SystemVue software, a signal-level simulation model of an airborne pulse-Doppler radar is designed based on its working principle and signal flow. Figure 4 As shown, the simulation model mainly consists of five parts: a radar transmitter, a simulation scene interface model, a radar receiver, a radar signal processor, and a radar data processor. To achieve Middle Pulse Repeat Frequency (MPRF) pulse Doppler processing, two parallel sets of radar transmitters, simulation scene interface models, radar receivers, and radar signal processors are built. Except for the Pulse Repeat Interval (PRI) and pulse width parameters, all other parameters are identical. By combining two PRI signals, airborne pulse Doppler velocity and range deambiguity can be achieved. The main components and principles of this simulation model are described in detail below.

[0041] Radar transmitter (Radar_TXsystem). The radar transmitter includes a signal excitation module, an up-conversion module, and a power amplifier. It simulates the process where the radar excitation signal output from the signal excitation module is converted by the up-conversion module and then amplified by the power amplifier to obtain the radar transmission signal.

[0042] The simulation scenario interface model (STK_Targets) includes the simulation scenario interface module (STK_Interface), the transmit antenna RF channel module (RF_TxAnt_Channel), and the receive antenna RF channel module (RF_RxAnt_Channel). The simulation scenario interface model connects to STK through the simulation scenario interface module. This module controls STK to read parameters from the Report according to the set time, specified Access relationships, and generated Report, and pass these parameters to SystemVue as simulation input. The parameters read include transmit antenna gain, transmit path attenuation, transmit path delay time, target radar cross-section, receive antenna gain, receive path attenuation, and receive path delay time. These parameters, through control of the transmit and receive antennas and the transmission simulation model and RCS simulation model, form a radar echo signal that conforms to the target relationships in the current STK simulation scenario and outputs it.

[0043] Specifically, the simulation scenario interface module obtains the transmit antenna gain, transmit path attenuation, transmit path delay time, target radar cross-section area, receive antenna gain, receive path attenuation, and receive path delay time by reading the parameter configuration file report, and outputs the above parameter values ​​as output values ​​to the transmit antenna RF channel module and the receive antenna RF channel module at the simulation time.

[0044] The simulation scenario interface module inputs the transmission parameters (transmit antenna gain, transmit path attenuation, and transmit path delay time) at the simulation moment into the transmit antenna RF channel module. The transmit antenna RF channel module adds transmit antenna gain and transmit path attenuation to the input radar transmit signal and delays it according to the transmit path delay time to obtain the one-way radar signal of the transmitted radar signal reaching the target aircraft. Then, the target radar cross-sectional area is added to the one-way radar signal and input into the receive antenna RF channel module. The receive antenna RF channel module adds receive antenna gain and receive path attenuation to the input signal and delays it according to the receive path delay time to obtain the final target echo signal. The value of the target radar cross-sectional area is achieved by controlling the gain of the control signal.

[0045] The radar receiver (Radar_RXsystem) simulates the target echo signal received by the radar antenna. It includes a transmit / receive switch module (RADAR_Switch), a gain control module (RADAR_GainCtrl), a receiver noise simulation module (Noise Density), and a down-conversion module (RADAR_Rx). The transmit / receive switch module isolates the target echo signal, the gain control module performs automatic gain control, and the receiver noise simulation module simulates thermal noise in the receiver. The signal output from the receiver noise simulation module is then digitally down-converted by the down-conversion module, ultimately outputting the processed radar intermediate frequency signal.

[0046] The radar signal processor (Radar_SignalProcess) includes a pulse compression module (RADAR_PC), a radar pulse Doppler processing module (RADAR_PD), and a radar constant false alarm rate (CFAR) detection module (RADAR_CFAR). First, the pulse compression module compresses the radar intermediate frequency signal processed by the radar receiver and the reference pulse sent by the radar transmitter. Then, the radar pulse Doppler processing module performs moving target indication (MTI) and moving target detection (MTD) processing. Finally, the radar CFAR detection module performs CFAR detection and outputs the detection results.

[0047] The radar data processor (Radar_DataProcess) includes a radar detection result centering module (RADAR_PlotsCentroid) and a radar de-ambiguity module (RADAR_AmbgtResolution). The radar detection result centering module receives the detection results from two different PRI signals after they have passed through the radar signal processor. It performs range and Doppler centering processing on the two signal detection results to eliminate the influence caused by cross-range / cross-Doppler cells. Then, the centered detection results are sent to the radar de-ambiguity module. The radar de-ambiguity module uses multiple PRI signals to jointly resolve range and velocity ambiguities, and finally outputs unambiguous velocity and range detection simulation results.

[0048] After building a complete simulation model of the airborne pulse-Doppler radar signal level, the radar parameters can be configured. For consistency, parameters for each model can be substituted with variables during model building and then uniformly edited in the Parameters section. Typical simulation parameter settings are shown in Table 3 for application.

[0049] Table 3 Typical Simulation Parameters

[0050] Parameter (variable) name meaning default value unit Data types PRI Upper branch pulse repetition interval <![CDATA[45×10 -6 ]]> Second floating-point numbers PRI_1 Lower branch pulse repetition interval <![CDATA[37×10 -6 ]]> Second floating-point numbers PulseWidth Upper branch pulse width <![CDATA[1.9×10 -6 ]]> Second floating-point numbers PulseWidth2 Lower branch pulse width <![CDATA[1.7×10 -6 ]]> Second floating-point numbers BandWidth radar signal bandwidth <![CDATA[4×10 6 ]]> hertz floating-point numbers RF_Freq radar signal radio frequency <![CDATA[10×10 9 ]]> hertz floating-point numbers IF_Freq radar signal intermediate frequency <![CDATA[70×10 6 ]]> hertz floating-point numbers BB_SamplingRate Simulated baseband signal sampling frequency <![CDATA[10 7 ]]> hertz floating-point numbers BB_UpSamplingRatio Simulated frequency conversion sampling frequency 20 — Integer NumOfPulse Radar accumulated pulse count 512 — Integer MTI_Type Signal processing for MTI type 0: Do not do MTI — Enumeration type

[0051] S5. Configure the simulation scene interface model in the simulation model. Through the simulation scene interface model, output the detected aircraft target in the specified Access relationship in the 3D scene and the parameter information in the parameter configuration file report to the SystemVue software as the control parameters for signal-level simulation.

[0052] In the sub-module of the simulation scene interface model in step S4, double-click the simulation scene interface module to open the module properties interface. First, select the STK parameter configuration file path in "Report Style". Select the radar object and target object in "Primary(From)Object" and "Access(To)Object" respectively. In the "Animation Time" tab, "Start" and "Stop" can set the corresponding simulation start time and simulation end time in the STK 3D scene. "TimeStep" is the time interval.

[0053] S6. According to the requirements of the three-dimensional scene, specify a certain moment in the three-dimensional scene as the signal-level simulation moment, and run the airborne pulse Doppler radar signal-level simulation model according to the control parameters at that simulation moment to obtain the visualized graphical simulation results of the airborne pulse Doppler radar signal processing at each stage, as well as the detection simulation results of the airborne pulse Doppler radar on the speed and distance of the detected aircraft target.

[0054] In this step, the airborne pulse-Doppler radar signal level simulation model is run, and the simulation results of the airborne pulse-Doppler radar's detection speed and distance to the detected aircraft target can be directly obtained, as shown in Table 4.

[0055] Table 4. Simulation Results of Airborne Pulse Doppler Radar Signal Level Model

[0056] Index S26_Index S26 1 0 97710 2 1 599.609 3 2 97695 4 3 599.609 5 4 97680 6 5 599.609 7 6 97665 8 7 599.609 9 8 97650 10 9 599.609

[0057] Table 4 lists the 10 results from 5 detections. Odd-numbered indices represent the relative distance to the detected targets, while even-numbered indices represent the relative velocities of the two targets. At the current simulation time (May 14, 2018, 16:01:01.000), the actual distance from the STK database is 97.235 km, and the actual relative velocity is 600 m / s (J-1 and J-2 are flying head-on towards each other at 300 m / s). The simulated detection distance is 97.710 km, and the velocity is 599.609 m / s. The simulated values ​​are largely consistent with the actual values, demonstrating the accuracy of the radar's target detection results and indicating that the simulation model is reliable.

[0058] In addition to directly obtaining the detection simulation results, the airborne pulse Doppler radar signal-level simulation model also uses the Sink module to record and observe the signal waveforms and spectrum simulation of each signal link. This enables the visualization of the signal waveforms and spectrum output by the radar transmitter, the target echo signals received by the radar receiver, the output results of the pulse compression module, the output results of the radar pulse Doppler processing module, and the output results of the radar constant false alarm detection module. It is also used to process the simulation data and perform a three-dimensional display of "range-Doppler-amplitude".

[0059] The airborne pulse Doppler radar signal-level simulation model simulates the characteristic waveform features of the transmitted signal from the airborne pulse Doppler radar. Figure 5 , Figure 6 The figures show the simulation results of the radar transmitter output signal waveform (envelope characteristics) and the spectrum simulation results, respectively. Figure 6 It can be observed that the radar transmitter's transmitted signal power of 72.35 dBm is basically consistent with the actual transmitted power of the airborne pulse Doppler radar.

[0060] like Figure 7 As shown, the radar signal attenuates after two-way spatial propagation. When it enters the radar receiver, the energy is very weak and has been submerged in the receiver noise.

[0061] like Figure 8 , Figure 9 , Figure 10 As shown, after the radar signal processor performs pulse compression and pulse Doppler (coherent accumulation) processing on the received target echo noise, and then performs constant false alarm rate (CFAR) detection, it can be found that the target can be detected after coherent accumulation. Figure 10 The location of the mid-peak value is the location of the detected aircraft target.

[0062] After processing the simulation data, a three-dimensional display of "distance-Doppler-amplitude" can be generated, such as... Figure 11 As shown, this display method can clearly show the distance and Doppler cells of the detected aircraft target. This perspective also provides a simulation verification method for carrying out anti-clutter and anti-interference processing.

[0063] In summary, this invention provides a radar system signal-level simulation method based on STK 3D scenes. This method establishes a 3D scene of the radar system using STK software, then builds a radar system signal-level simulation model using SystemVue software, and simultaneously connects with STK to read the scene target configuration parameter file. The radar system's reception and processing of target echo signals is simulated, and finally, the distance and velocity of the target echo signals are measured without ambiguity.

[0064] The airborne pulse-Doppler radar system signal-level simulation method proposed in this invention constructs a 3D scene of the radar system using STK software. After adding an airborne pulse-Doppler radar object to a specified aircraft target, establishing an Access relationship between the radar and the detected aircraft target, and generating a parameter configuration file report, a signal-level simulation model of the airborne pulse-Doppler radar is constructed using SystemVue software. Simultaneously, the simulation scene interface model is connected to STK software to read the detected aircraft target from the Access relationship and the parameter information from the parameter configuration file report. This simulates the process of receiving and processing the target echo signal by the airborne pulse-Doppler radar, while simultaneously performing unambiguous measurements of the target echo signal's distance and velocity, thus obtaining the simulation results of the airborne pulse-Doppler radar's detection of the speed and distance of the detected aircraft target. This invention enables the design, application, and verification of airborne pulse-Doppler radar systems to be closer to actual usage scenarios, and greatly improves the realism and practicality of airborne pulse-Doppler radar system simulation. It provides a platform for the digital verification of the system in actual combat environments, while simplifying the construction and configuration of airborne pulse-Doppler radar system simulation models, and realizing efficient and software-based verification of the design of airborne pulse-Doppler radar systems.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method of signal level simulation of an airborne pulsed Doppler radar system, characterized by, The method comprises the following steps: S1, using STK software to build a three-dimensional scene, adding an aircraft target in the three-dimensional scene, and editing flight information of the aircraft target; S2, adding an airborne pulse Doppler radar object to the specified aircraft target, configuring antenna parameters, transmitter parameters, target direction and target radar cross section of the airborne pulse Doppler radar; S3, establishing an Access association relationship between the airborne pulse Doppler radar and the detected aircraft target, and generating a parameter configuration file report; S4, building an airborne pulse Doppler radar signal level simulation model in SystemVue software, and configuring simulation model running parameters; The airborne pulse Doppler radar signal level simulation model comprises two sets of parallel radar transmitters, a simulation scene interface model, a radar receiver and a radar signal processor, and the two sets of parallel radar transmitters are only different in pulse repetition interval and pulse width parameter settings; the airborne pulse Doppler radar signal level simulation model further comprises a radar data processor; The simulation scene interface model comprises a simulation scene interface module, a transmitting antenna radio frequency channel module and a receiving antenna radio frequency channel module; the simulation scene interface module obtains transmitting antenna gain, transmitting wave path attenuation, transmitting wave path delay time, target radar cross section, receiving antenna gain, receiving wave path attenuation and receiving wave path delay time by reading the parameter configuration file report, and inputs the transmitting antenna gain, the transmitting wave path attenuation and the transmitting wave path delay time at the simulation time into the transmitting antenna radio frequency channel module; the transmitting antenna radio frequency channel module obtains a one-way radar signal at the detected aircraft target by adding the transmitting antenna gain, the transmitting wave path attenuation to the input radar transmitting signal and delaying according to the transmitting wave path delay time, and inputs the one-way radar signal after adding the target radar cross section to the receiving antenna radio frequency channel module; the receiving antenna radio frequency channel module obtains a target echo signal by adding the receiving antenna gain, the receiving wave path attenuation to the input signal and delaying according to the receiving wave path delay time; S5, configuring the simulation scene interface model in the simulation model, outputting the detected aircraft target in the Access association relationship and the parameter information in the parameter configuration file report to the SystemVue software through the simulation scene interface model as control parameters of signal level simulation; S6, specifying a time of the three-dimensional scene as a signal level simulation time, and running the airborne pulse Doppler radar signal level simulation model according to the control parameters at the simulation time, to obtain visualized graphical simulation results of each level of processing process of the airborne pulse Doppler radar signal and detection simulation results of the speed and distance of the detected aircraft target by the airborne pulse Doppler radar.

2. The airborne pulse Doppler radar system signal level simulation method according to claim 1, wherein the radar transmitter comprises a signal excitation module, an up-conversion module and a power amplifier; the radar excitation signal output by the signal excitation module is converted by the up-conversion module, and then is amplified by the power amplifier to obtain a radar transmitting signal. ​ The radar receiver comprises a transceiver switch module, a gain control module, a receiver noise simulation module and a down-conversion module, the transceiver switch module performs transceiver isolation on the target echo signal, the gain control module and the receiver noise simulation module sequentially perform automatic gain control and thermal noise simulation on the isolated signal, and finally the down-conversion module performs digital down-conversion processing on the signal output by the receiver noise simulation module and outputs a radar intermediate frequency signal; The radar signal processor comprises a pulse compression module, a radar pulse Doppler processing module and a radar constant false alarm detection module, the pulse compression module performs pulse compression processing on the radar intermediate frequency signal and a reference pulse sent by the radar transmitter, then performs moving target display processing and moving target detection processing through the radar pulse Doppler processing module, and finally completes constant false alarm detection in the radar constant false alarm detection module and outputs a detection result; The radar data processor comprises a radar detection result centring module and a radar deblurring module, the radar detection result centring module receives the detection results output by the two sets of radar signal processors and performs distance and Doppler centring processing respectively, and sends the centred detection results to the radar deblurring module, the radar deblurring module resolves distance and speed blurs through multi-PRI signal jointing, and finally outputs a non-blurred speed and distance detection simulation result.

3. The method of claim 2, wherein the method further comprises: The airborne pulse Doppler radar signal level simulation model further comprises a Sink module, the Sink module is used for displaying the signal waveform and spectrum output by the radar transmitter, the target echo signal received by the radar receiver, the output result of the pulse compression module, the output result of the radar pulse Doppler processing module and the output result of the radar constant false alarm detection module in a visualized graph, and is further used for performing "distance-Doppler-amplitude” three-dimensional display after processing the simulation data.

4. The method of claim 1 or 2, wherein, When the antenna parameters of the airborne pulse Doppler radar are configured, the antenna type is set as a phased array, the antenna shape is set as a polygon, the antenna aperture size and the number of radiation units are automatically calculated by setting the number of antenna units and the unit distance in the x and y directions.

5. The method of claim 1 or 2, wherein, The type of the target radar cross section area is set as a constant, and the size is 13.0103 dBsm.

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