微动目标多普勒谱分析和参数估计  

Analysis of Doppler Spectrum and Parameters Estimation for Target with Micro-motion

作　　者：陈行勇[1] 刘永祥[1] 姜卫东[1] 黎湘[1] 郭桂蓉[1] 

机构地区：[1]国防科技大学电子科学与工程学院空间电子信息技术研究所,长沙410073

出　　处：《信号处理》2008年第1期1-6,共6页Journal of Signal Processing

基　　金：国防预研项目(No.41303040203);自然科学基金项目(No.60402032)

摘　　要：首先建立了转动线形目标和进动锥形目标的回波模型,分析了三种典型微动目标的多普勒谱,引入低通谱宽和带通谱宽的概念,推导了机动点目标低通谱宽以及转动线形目标带通谱宽表达式,对进动锥形目标的低通谱宽进行了数值分析,给出了基于多普勒谱的微动参数估计方法,最后进行了仿真,证明了理论分析的正确性。In this paper,the echo signal models are derived for rotating line-shaped target and precessing cone-shaped target. Then,with the introduction of the conceptions of lowpass-spectrum width and bandpass-spectrum width, Doppler spectrum features are investigated for three typical micro-motion targets. The Lowpass-spectrum width is derived for maneuvering single target and rotating lineshaped target,while bandpass-spectrum width is analyzed with numerical method for precessing cone-shaped target. Besides, Parameters estimation approach is proposed by means of Doppler spectrum. Monte Carlo simulations demonstrate the performance of the parameter estimation approach, and the results confirm our analytical conclusions.

关 键 词：雷达目标 微多普勒特征 多普勒谱 转动 进动 

分 类 号：TN959.72[电子电信—信号与信息处理] F830.9[电子电信—信息与通信工程]