雷达目标微多普勒特征提取的频率稳定度约束  

Frequency stability constraints on micro-Doppler feature extraction of radar target

作　　者：鄢宏华[1] 王文生[1] 

机构地区：[1]中国电子科学研究院,北京100041

出　　处：《电波科学学报》2014年第4期644-652,共9页Chinese Journal of Radio Science

基　　金：上海航天科技创新基金(No.SAST201240);国家自然科学基金(No.61271373)

摘　　要：微多普勒特征的准确提取对于雷达目标识别具有重要意义.提出了调频闪烁噪声产生方法;给出了频率源相位噪声综合的参数化模型.在此基础上,结合相位噪声对微多普勒特征提取的影响分析,建立了以载频信号相位噪声为主要干扰源的全相参脉冲雷达微多普勒特征提取仿真系统.引入逆拉东(Radon)变换,定量分析了相位噪声对雷达目标微多普勒特征提取的影响,得出现有的晶振技术指标可支撑中段弹头目标微多普勒特征提取的明确结论.Extracting micro-Doppler feature correctly is significant for radar target rec- ognition. One FM flicker noise generation method and parametric model for phase noise synthesis are proposed. Based on it, combined with the analysis of the impact of phase noise on micro-Doppler feature extraction, a simulation system for coherent pulse radar＇s micro-Doppler feature extraction is presented where phase noise of carrier signal acts as the main role of interference source. Introducing inverse Radon transform, quantita- tive analysis the impact of phase noise on micro-Doppler feature extraction of radar tar get is given for the first time, giving the conclusion that existing crystal level can sup- port the micro-Doppler feature extraction of warhead target in middle stage.

关 键 词：微多普勒 频率源 相位噪声 

分 类 号：TN957[电子电信—信号与信息处理]