Method for Micro-motion Target Recognition and Motion Parameter Extraction Based on Time-frequency Analysis
基于时频图的微动目标运动参数提取和特征识别的方法

Spatial motion feature is one of main target features for missile target identification. This paper investigates micro-motion of the missile target. Time-frequency analysis is used to extract micro-Doppler signature, based on which an approach is proposed for estimating the linear sum of the micro-Dopplers of scatters. Motion parameters can be extracted by applying Fourier Transform to the sum. Then waveform entropy is presented for the missile identification. The simulation results and the recognition results validate the effectiveness of theoretical analysis.