Radar target intermediate frequency (IR) echo simulation system based on multi-beam amplitude-comparison angle measurement and control method thereof

Abstract

The invention relates to a radar target intermediate frequency (IR) echo simulation system based on multi-beam amplitude-comparison angle measurement and a control method thereof, relating to the field of radar target echo simulation. The system comprises three target echo simulation boards and an arbitrary waveform generator instrument fixture, wherein the echo simulation boards are designed with a computer module PC104, a field programmable gate array (FPGA), direct digital synthesis (DDS) technique and a simulation circuit as cores; and the arbitrary waveform generator instrument fixture is designed with instrument programming control as the core. According to the invention, simultaneous 6-channel simulated target IR echo simulation of the radar of the multi-beam amplitude-comparison angle measurement system is realized, parameters of the simulated target echo such as distance, delay, echo amplitude, Doppler shift, pattern, direction pattern modulation, noise superposition and the like can be controlled, single-channel switching and output of dual-beam echo is realized, and the test use requirement of the radar signal processor of the system is met. In the invention, the arbitrary waveform generator instrument frock is utilized, thus improving the amplitude precision of the output echo signals; and the control program in the FPGA in the target echo simulation boards is designed by the soft IP core, thus providing convenience for hardware transplanting and clipping.

Description

technical field [0001] The invention belongs to the technical field of radar target echo simulation, and relates to a multi-beam ratio-amplitude radar target intermediate-frequency echo simulation system and a control method thereof, which are designed by using digital circuits, analog circuits and complex instrument control technologies, etc., and can simultaneously simulate 6 channels The output of the target intermediate frequency echo signal completes the real-time calculation of the parameters of the moving target, and realizes the real-time control of the simulated intermediate frequency echo signal distance delay, Doppler frequency deviation, two-dimensional pattern modulation, and amplitude modulation. Background technique [0002] Radar target simulator is a product of the development of radar technology. In the development process of radar products, it plays an important role and can reduce many field tests, which not only saves the cost of product development, but...

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Problems solved by technology

[0007] The present invention aims at the defect that the existing radar signal simulator cannot satisfy the detection of multi-targets in different motion states by the simulated radar under different transmission signals, and develops a radar target mid-frequency echo simulation system for pitching and simultaneous multi-beam ratio-amplitude angle-measuring radar targets , can generate 6 channels of simulated target intermediate frequency echo signals at the same time, and perform real-time simulation of the distance delay, velocity Doppler frequency deviation, echo amplitude, elevation / azimuth pattern modulation, etc. of the target echo signal, which is used in the laboratory In the stage, the functions of pulse compression, digital down-conversion, MTI, MTD, CFAR, point-track condensation and other functions of the multi-beam system radar signal processor at the same time are verified.

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