Research And Application Of Time-Frequency Analysis In The Multi-targets Measuring Of Doppler Radar

Time-Frequency Analysis algorithm is regarded as a great revolution to the core algorithm of doppler speed radar. It can be used in such areas as target range. So it is very important to do research on the theory, algorithm. In this paper, all of our work surrounds these problems.The first part of our paper's work is the basic of the paper. We give the theory of the Doppler speed radar, and build the mathematical model of high-speed target echo signal. So we decide take Time-Frequency Analysis algorithm to process radar signal. We also introduce the basic concepts and characters of Time-Frequency Analysis algorithm. This part includes chapter 2,3,4.In the second part of our paper's work, we put forward target detection method based on TFA (Time-Frequency Analysis) according to the characteristics of targets. Based on the characteristics of some typical TFA, we simulate these methods with observed data and compare the results. When implementation simplification and simulation results are considered, STFT(Short Time Fourier Transform) is showed to be a comparatively better method. This part includes chapter 5.The second part of our paper's work is detection and parameter estimation of the targets. This paper introduces the method of doppler radar echo signals detection using Radon-STFT. Combined with CLEAN technique, the method can be used to simulating doppler radar echo signals separation and parameter estimation and gives the satisfied result.The general work of this paper is summarized and the further research direction is pointed out in the last chapter.