速度对微多普勒的影响及其补偿研究  

Research on the influence of velocity on micro-Doppler and its compensation

作　　者：高红卫[1] 谢良贵[2] 文树梁[1] 匡勇[1] 

机构地区：[1]中国航天科工集团公司二院23所,北京100854 [2]中国航天科工集团公司二院,北京100854

出　　处：《航天电子对抗》2008年第4期46-50,共5页Aerospace Electronic Warfare

摘　　要：微多普勒为雷达目标识别提供了一种新的思路和方法,而目标的平动速度会影响微多普勒信息的提取。以锥体目标的进动为例来研究速度对微多普勒的影响,并提出中心法进行等效速度补偿,该方法不是先估计出速度值再对原始信号进行补偿,而是基于原始信号频谱信息进行的一种后处理。仿真结果表明该方法能有效地补偿速度。同时基于速度补偿后的频谱,提出重心法估计微多普勒的调制带宽并与中心法进行了比较,且采用最小二乘法拟合了不同信噪比下的估计误差。估计出的调制带宽可作为一种参数特征用于识别。Micro-Doppler provides a new way for radar target recognition while the translation velocity affects the extraction of micro-Doppler information. The influence of velocity on micro-Doppler is studied under the case of the cone-shaped target＇s precession,and a center method is proposed to compensate the velocity equivalently,which does not estimate the value of velocity for the compensation to the origin signal,but performs a post-processing based on the spectrum information of the origin signal. The simulating result shows that this method can effectively compensate the velocity. Besides, based on the spectrum after compensation, a barycenter method, compared with the center method,is proposed to estimate the modulation bandwidth of micro-Doppler, and meanwhile the least square fit is adopted to reduce the estimation error under the different SNR. The estimated modulation bandwidth can serve as a parameter feature for the recognition,

关 键 词：微多普勒 速度补偿 调制带宽 最小二乘拟合 

分 类 号：TN958[电子电信—信号与信息处理]