Design And Development Of Missile-borne Radar Digital Signal Processor System

This paper takes the design and development of missile-borne radar digital signal processing system as the main research content.According to the signal processor's design ideas and development process,the digital signal processing system design and FPGA development,missile-borne radar integrated testing system and the use of missile-borne radar integrated test system to complete the signal processor test validation are conducted in detail.First,the hardware design and FPGA development of the digital signal processing system are introduced in detail.The signal processor hardware platform takes "miniaturization,low power consumption,high reliability,and standardization" as the main design direction.The platform design scheme adopts the industry's mainstream FPGA+DSP architecture,and the Virtex-6 series FPGA chip manufactured by XILINX Corporation and TI's TMS320C6678 DSP chips are selected for the purpose.The hardware design and development work of this article mainly center on the FPGA deployment.FPGA as the main control chip,mainly controls to complete the AD sampling,data preprocessing for the sampling results,including digital down conversion and pulse compression,and the results of preprocessing are transmitted to two DSP chips through the serial rapid IO interface by Ping-Pong mode for subsequent imaging processing.Second,the missile-borne radar integrated test system and the echo simulation based on this system are introduced in detail.Under normal circumstances,the actual performance of the signal processor often requires the verification of the external field experiment.This method is time-consuming and laborious,and is easily affected by external conditions such as weather.In addition,the full physical seeker system has many peripheral and is expensive.If it is used to test and verify for signal processing algorithms,additional overhead will emerge.Therefore,the application of missile-borne radar integrated test system in the laboratory test verification phase is particularly significant.Missile-borne radar integrated test system can simulate the radar front-end output echo signal to the signal processing board to implement the signal processing algorithm,and then verify the signal processing algorithm performance and whether the signal processing system work properly.In this paper,the main functions of the missile-borne radar integrated test system,the specific system software and the system communication interface are described in detail.The echo simulation flow based on the missile-borne radar integrated test system is given,and the echo simulation test is performed at the same time.Finally,according to existing experimental conditions,a complete system test verification scheme is developed.The missile-borne radar integrated test system is used to complete the FPGA pre-processing algorithm and the entire system test and verification.Firstly,the conversion of the simulated echo data and the setting of playback parameters are completed in the missile-borne radar integrated test system.The missile-borne radar integrated test system outputs the simulated radar echo signal and the frame synchronization and pulse synchronization signals.So that the test verification is accurate and reliable,in the test,we divide the entire system into two verification stages,front-end stage and back-end stage.The front-end test is a phased test of the entire system,mainly verifying the correctness of the pre-processing algorithm.The back-end test is the overall test of the system,mainly verifying whether the imaging system can work normally,in which the back-end test is based on the front-end test to complete the DSP imaging processing algorithm,and the imaging processing results are transmitted to the host computer software to show the real-time imaging results,and then complete the entire imaging system function test and validation.