Radio frequency simulation method, system and simulation system for injection radar multi-target echo

Abstract

The application provides a kind of injection radar multi-target echo radio frequency simulation method, system and simulation system, the method comprises: S10, in dynamic scene editing generation software design test scene and set scene data;S20, sample signal simulation unit generates radar sample signal and outputs to multiple independent radio frequency channels;S30, integrated control center is obtained using scene data calculation signal modulation parameter, and using the signal modulation parameter is modulated to radar sample signal in each radio frequency channel, generates multi-target echo simulation signal.The application carries out radar multi-target echo simulation technology research through radio frequency simulation technology, realizes power management and frequency control through the frequency conversion system of quick control simulation system, reaches the generation of different position multi-target echo simulation signal, improves the ability and fidelity of radar target echo simulation.

Description

Technical Field

[0001] This invention relates to the field of radar system simulation technology, and more specifically, to a radio frequency simulation method, system, and simulation system for multi-target echoes of an injection radar. Background Technology

[0002] Conducting radar target detection and tracking capability verification experiments in the laboratory requires the use of simulation systems to generate radar target echo signals / data, thereby optimizing and improving radar signal processing algorithms. Traditional methods mainly include analytical methods, computer simulation methods, and hardware-in-the-loop (HIL) methods. Currently, computer simulation and HIL methods are the most commonly used. Computer simulation uses specialized simulation tools to generate radar target echo data on a computer, and uses this data to optimize and develop radar signal processing algorithms. HIL methods use a hardware platform to generate radar target echo data and directly inject the data into the radar signal processor to optimize and develop radar signal processing algorithms. The HIL method can accurately simulate the radar's operating timing, and combined with corresponding hardware processing resources and operating logic, makes the simulation verification closer to the actual radar processing process. Given the technical advantages of the HIL method, it is now widely used in the field of radar system simulation technology and is gradually becoming the most commonly used testing and evaluation method.

[0003] The radar target echo simulation equipment currently used in radar semi-physical tests generally operates by using scene editing software to define radar operating parameters and platform trajectory, forming scene data. The control center then uses this data to calculate modulation parameters such as echo signal delay, attenuation, and Doppler frequency, and applies these parameters to the signal generated by the radar target echo simulator to achieve the purpose of simulating radar target echo signals. However, echo signal simulation is usually achieved at intermediate frequency or even baseband, resulting in insufficient realism of target echo simulation and a decrease in the fidelity and credibility of the final test results, which is particularly prominent in the presence of multiple targets. Summary of the Invention

[0004] The present invention aims to provide a radio frequency simulation method, system and simulation system for injection radar multi-target echo, in order to solve the problem that the simulation of radar echo signals in current radar semi-physical tests is reduced in realism and reliability due to the implementation of intermediate frequency or even baseband.

[0005] This invention provides a radio frequency simulation method for multi-target echoes from injection radar, comprising:

[0006] S10, Design the test scenario and set the scenario data in the dynamic scene editing and generation software;

[0007] S20, the sample signal simulation unit generates radar sample signals and outputs them to multiple independent radio frequency channels;

[0008] S30, the integrated control center uses scene data to calculate signal modulation parameters, and uses the signal modulation parameters to modulate the radar sample signals in each radio frequency channel to generate multi-target echo simulation signals.

[0009] Furthermore, step S10 includes:

[0010] According to the requirements of the radar test mission, the spatial position, trajectory and motion parameters of the radar and each target platform are defined in the dynamic scene editing and generation software;

[0011] Set the radar's operating mode and parameters, and define the signal pulse width, repetition period, carrier frequency, and signal modulation method for each operating mode, as well as the antenna scanning method and corresponding scanning parameters.

[0012] Furthermore, in step S20, the sample signal simulation unit generates radar sample signals based on the radar's operating mode and operating parameters issued by the dynamic scene editing and generation software.

[0013] Furthermore, step S30 includes:

[0014] The radar sample signal is processed by multiple signal simulation channels in the target echo simulation channel to form a multi-target radar sample signal, which is then output to the up-conversion system.

[0015] The integrated control center uses scene data to calculate the spatial position of each target platform relative to the radar and the pointing of the radar antenna relative to the target platform according to a certain time rhythm, and converts it into signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters; the signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters, together with the radar operating frequency, are sent from the integrated control center to the upconversion system and downconversion system according to the corresponding time rhythm.

[0016] The up-conversion system performs frequency conversion, delay, and attenuation processing on the multi-target radar sample signal based on the signal propagation delay time, amplitude attenuation, and Doppler frequency modulation parameters and the radar's operating frequency. Then, the down-conversion system simulates the spatial propagation process of the signal to generate a multi-target echo simulation signal.

[0017] The present invention also provides a radio frequency simulation system for injection radar multi-target echo, including interconnected dynamic scene editing and generation software, sample signal simulation unit and multiple independent radio frequency channels;

[0018] The radio frequency simulation system for injection-type radar multi-target echo is used to implement the above-mentioned radio frequency simulation method for injection-type radar multi-target echo.

[0019] Furthermore, the multiple independent radio frequency channels consist of multiple signal simulation channels in the target echo simulation channel, as well as an up-conversion system and a down-conversion system.

[0020] The present invention also provides a radio frequency simulation system for injection radar multi-target echo, including a signal acquisition and processing unit, a signal power measurement unit, a signal power calculation unit, and the above-mentioned radio frequency simulation system for injection radar multi-target echo;

[0021] The signal acquisition and processing unit is connected to the integrated control center and the downconversion system;

[0022] The signal power measurement unit is connected to the up-conversion system and the down-conversion system;

[0023] The signal power calculation unit is connected to the signal acquisition and processing unit.

[0024] Furthermore, the radio frequency simulation system for injecting radar multi-target echo also includes a display and control terminal; the display and control terminal is connected to the signal acquisition and processing unit.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] This invention conducts research on radar multi-target echo simulation technology using radio frequency simulation technology. By rapidly controlling the frequency conversion system of the simulation system, power management and frequency control are achieved, thereby generating simulated echo signals of multiple targets at different locations and improving the radar target echo simulation capability and realism.

[0027] This invention has been applied to the current research stage of radar signal processing algorithms in the laboratory and has been successfully applied to the development of radar simulators. By conducting multi-target echo simulation experiments in the laboratory, radio frequency level simulation of multiple target echoes in the same scene has been completed, which is of great significance to the research of radar signal processing algorithms and radar waveform design. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the radio frequency simulation of the injection radar multi-target echo of the present invention.

[0030] Figure 2 This is a schematic diagram of a multi-target echo simulation scenario in the example.

[0031] Figure 3 The waveform diagram shows the result of target echo processing in the multi-target echo simulation scenario in the example. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] Example

[0035] like Figure 1 As shown, this embodiment proposes a radio frequency simulation method for multi-target echoes from an injection radar, including:

[0036] S10, Designing experimental scenarios and setting scenario data in dynamic scene editing and generation software; specifically including:

[0037] According to the requirements of the radar test mission, the spatial position, trajectory and motion parameters of the radar and each target platform are defined in the dynamic scene editing and generation software;

[0038] Set the radar's operating mode and parameters, and define the signal pulse width, repetition period, carrier frequency, and signal modulation method for each operating mode, as well as the antenna scanning method and corresponding scanning parameters.

[0039] S20, the sample signal simulation unit generates radar sample signals based on the radar's working mode and working parameters issued by the dynamic scene editing software and outputs them to multiple independent radio frequency channels.

[0040] S30, the integrated control center calculates signal modulation parameters using scene data, and uses these parameters to modulate radar sample signals in each radio frequency channel to generate multi-target echo simulation signals; specifically including:

[0041] The radar sample signal is processed by multiple signal simulation channels in the target echo simulation channel to form a multi-target radar sample signal, which is then output to the up-conversion system.

[0042] The integrated control center uses scene data to calculate the spatial position of each target platform relative to the radar and the pointing of the radar antenna relative to the target platform according to a certain time rhythm, and converts it into signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters; the signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters, together with the radar operating frequency, are sent from the integrated control center to the upconversion system and downconversion system according to the corresponding time rhythm.

[0043] The upconversion system performs frequency conversion, delay, and attenuation processing on the multi-target radar sample signal based on the signal propagation delay time, amplitude attenuation, and Doppler frequency modulation parameters and the radar's operating frequency. Then, the downconversion system simulates the spatial propagation process of the signal (including signal generation, propagation, and processing) to generate a multi-target echo simulation signal.

[0044] Example 2

[0045] like Figure 1 As shown, this embodiment provides a radio frequency (RF) simulation system for injection-type radar multi-target echoes, including interconnected dynamic scene editing and generation software, sample signal simulation units, and multiple independent RF channels. The RF simulation system for injection-type radar multi-target echoes is used to implement the RF simulation method for injection-type radar multi-target echoes described in Embodiment 1. The multiple independent RF channels consist of multiple signal simulation channels in the target echo simulation channel, as well as an up-conversion system and a down-conversion system. The specific working principle is the same as the RF simulation method for injection-type radar multi-target echoes described in Embodiment 1, and will not be repeated here.

[0046] Example 3

[0047] like Figure 1 As shown, a radio frequency simulation system for injection radar multi-target echo is characterized by comprising a signal acquisition and processing unit, a signal power measurement unit, a signal power calculation unit, a display and control terminal, and a radio frequency simulation system for injection radar multi-target echo as described in Example 2.

[0048] The signal acquisition and processing unit is connected to the integrated control center and the downconversion system;

[0049] The signal power measurement unit is connected to the up-conversion system and the down-conversion system;

[0050] The signal power calculation unit is connected to the signal acquisition and processing unit;

[0051] The display and control terminal is connected to the signal acquisition and processing unit.

[0052] The working principle of the simulation system includes:

[0053] S10, Designing experimental scenarios and setting scenario data in dynamic scene editing and generation software; specifically including:

[0054] According to the requirements of the radar test mission, the spatial position, trajectory and motion parameters of the radar and each target platform are defined in the dynamic scene editing and generation software;

[0055] Set the radar's operating mode and parameters, and define the signal pulse width, repetition period, carrier frequency, and signal modulation method for each operating mode, as well as the antenna scanning method and corresponding scanning parameters.

[0056] S20, the sample signal simulation unit generates radar sample signals based on the radar's working mode and working parameters issued by the dynamic scene editing software and outputs them to multiple independent radio frequency channels.

[0057] S30, the integrated control center calculates signal modulation parameters using scene data, and uses these parameters to modulate radar sample signals in each radio frequency channel to generate multi-target echo simulation signals; specifically including:

[0058] The radar sample signal is processed by multiple signal simulation channels in the target echo simulation channel to form a multi-target radar sample signal, which is then output to the up-conversion system.

[0059] The integrated control center uses scene data to calculate the spatial position of each target platform relative to the radar and the pointing of the radar antenna relative to the target platform according to a certain time rhythm, and converts it into signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters; the signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters, together with the radar operating frequency, are sent from the integrated control center to the upconversion system and downconversion system according to the corresponding time rhythm.

[0060] The upconversion system performs frequency conversion, delay, and attenuation processing on the multi-target radar sample signal based on the signal propagation delay time, amplitude attenuation, and Doppler frequency modulation parameters and the radar's operating frequency. Then, the downconversion system simulates the spatial propagation process of the signal (including signal generation, propagation, and processing) to generate a multi-target echo simulation signal.

[0061] S40, the multi-target echo analog signal input signal acquisition and processing unit performs simulation; during the simulation, at specific time points, the signal power measurement unit measures the RF signal power at the output of the up-conversion system and the IF signal power at the output of the down-conversion system, and the signal power calculation unit calculates the video signal power at the signal acquisition and processing unit. Through the acquisition, storage and analysis of the experimental data, the loss links and loss amounts of the multi-target echo analog signal in the radar signal processing link are identified, providing guiding suggestions for the improvement of radar signal processing algorithms and radar waveform design.

[0062] Application example:

[0063] This example illustrates a test scenario involving one radar and three target platforms, as detailed below:

[0064] First, a software-defined adversarial scenario is generated using dynamic scene editing. The detection side includes one ground-based long-range early warning radar, and a target formation consists of three airborne platforms. The radar's operating parameters are designed according to the following configuration: the radar operates in the S-band, the signal is a low-repetition-frequency linear frequency modulated signal, the antenna operates in a circular scanning mode, and the target formation approaches the long-range early warning radar in a triangular formation. Figure 2 As shown;

[0065] Secondly, the simulation system is run. The integrated control center uses scene data to calculate the spatial distance of each platform relative to the radar and the direction of the radar antenna relative to the platform according to a certain rhythm. This is converted into signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters. These modulation parameters, together with the operating frequency, are sent from the integrated control center to the upconversion system and downconversion system according to the corresponding time rhythm to complete the signal conversion, delay and attenuation processing, and finally output through the radio frequency port.

[0066] Third, the signal power measurement unit (spectrum analyzer) is connected to the output channel of the upconversion system and the output port of the downconversion system in sequence, the target echo power of each channel is recorded, and the video signal power is obtained by the post-analysis of the test data through the signal power calculation unit.

[0067] Fourth, by combining the experimental mission, radar operating parameters, experimental phenomena, and experimental analysis results, the changes in the multi-target echo simulation signal under the current experimental conditions within the radar signal processing link can be obtained. The processing results are as follows: Figure 3 As shown, this provides guidance and suggestions for radar signal processing algorithm research and radar waveform design.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A radio frequency simulation method for multi-target echoes from an injection-type radar, characterized in that, include: S10, Design the test scenario and set the scenario data in the dynamic scene editing and generation software; S20, the sample signal simulation unit generates radar sample signals and outputs them to multiple independent radio frequency channels; S30, the integrated control center calculates signal modulation parameters using scene data, and uses the signal modulation parameters to modulate the radar sample signals in each radio frequency channel to generate a multi-target echo simulation signal; step S30 includes: The radar sample signal is processed by multiple signal simulation channels in the target echo simulation channel to form a multi-target radar sample signal, which is then output to the up-conversion system. The integrated control center uses scene data to calculate the spatial position of each target platform relative to the radar and the pointing of the radar antenna relative to the target platform according to a certain time rhythm, and converts it into signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters; the signal propagation delay time, amplitude attenuation and Doppler frequency modulation parameters, together with the radar operating frequency, are sent from the integrated control center to the upconversion system and downconversion system according to the corresponding time rhythm. The up-conversion system performs frequency conversion, delay, and attenuation processing on the multi-target radar sample signal based on the signal propagation delay time, amplitude attenuation, and Doppler frequency modulation parameters and the radar's operating frequency. Then, the down-conversion system simulates the spatial propagation process of the signal to generate a multi-target echo simulation signal.

2. The radio frequency simulation method for multi-target echoes of injection radar according to claim 1, characterized in that, Step S10 includes: According to the requirements of the radar test mission, the spatial position, trajectory and motion parameters of the radar and each target platform are defined in the dynamic scene editing and generation software; Set the radar's operating mode and parameters, and define the signal pulse width, repetition period, carrier frequency, and signal modulation method for each operating mode, as well as the antenna scanning method and corresponding scanning parameters.

3. The radio frequency simulation method for multi-target echoes of injection radar according to claim 2, characterized in that, In step S20, the sample signal simulation unit generates radar sample signals based on the radar's operating mode and operating parameters issued by the dynamic scene editing and generation software.

4. A radio frequency simulation system for injection-type radar multi-target echo, characterized in that, It includes interconnected dynamic scene editing and generation software, sample signal simulation unit, and multiple independent radio frequency channels; The radio frequency simulation system for injection-type radar multi-target echo is used to implement the radio frequency simulation method for injection-type radar multi-target echo as described in any one of claims 1-3.

5. The radio frequency simulation system for injection-type radar multi-target echo according to claim 4, characterized in that, The multiple independent radio frequency channels consist of multiple signal simulation channels in the target echo simulation channel, as well as an up-conversion system and a down-conversion system.

6. A radio frequency simulation system for injecting radar multi-target echoes, characterized in that, It includes a signal acquisition and processing unit, a signal power measurement unit, a signal power calculation unit, and a radio frequency simulation system for injection radar multi-target echo as described in claim 4 or 5; The signal acquisition and processing unit is connected to the integrated control center and the downconversion system; The signal power measurement unit is connected to the up-conversion system and the down-conversion system; The signal power calculation unit is connected to the signal acquisition and processing unit.

7. The radio frequency simulation system for multi-target echo of injection radar according to claim 6, characterized in that, It also includes a display and control terminal; the display and control terminal is connected to the signal acquisition and processing unit.

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