Research And Hardware Implementation Of The Signal Processing For LFMCW Radar

Linear frequency modulated continuous wave radar radiates chirp signal to measure the distance, speed and other information about the target. With the features of multi-target imaging, none of blind distance, high range resolution, low transmission power and simple structure, LFMCW radar closely matches the need of modern society and receives widespread attention. The theoretical research and application of LFMCW radar has been developing rapidly, and achieving increasingly significant results, so the LFMCW radar is more and more widely applying to the military and civilian fields. Currently, the research of LFMCW radar signal processing is mainly focusing on target detection, parameter estimation and the distance-speed decoupling of the moving target. Therefore, it has a very great significance to study in the linear frequency modulated continuous wave radar.This paper set focus on the fundamental theory of the multi-cycle LFMCW radar, as well as the methods for measuring the speed and distance and relieving the distance-speed decoupling of the target. And through simulation and quantitative data analysis, the signal processing and related key algorithm of the LFMCW radar were analyzed. And on the basis of the design of the DSP+FPGA hardware processing platform, the configuration of the hardware platform and the function of each module were analyzed in detail. According to the theory of LFMCW radar research and hardware platform, the entire processing algorithms were performed, including the moving target indication(MTI), anti-asynchronous interference, moving target detection(MTD) and CFAR.The debugging of the hardware modules, as well as the functional testing of signal processing algorithms, indicated that the processing algorithms, hardware platform design and the whole process are reasonable. And the each indicator perfectly met the requirements of the shipboard navigation radar system.