对称三角线性调频连续波雷达目标微动特征分析与提取  

Analysis and Extraction of Micro-motion Features of Symmetrical Triangular LFMCW Radar

作　　者：丁帅帅 张群[1] 刘奇勇[1] 罗迎[1] 赵盟盟 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《空军工程大学学报（自然科学版）》2015年第3期30-34,共5页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61172169)

摘　　要：建立了对称三角线性调频连续波(STLFMCW)雷达目标的微动模型,通过对微动目标回波信号的分析,推导了微动目标的微多普勒表现形式,分析表明微动目标在扫频周期内的连续运动会导致目标的微多普勒曲线出现走动和展宽现象。针对该问题,进一步提出了一种微多普勒曲线展宽抑制及距离走动补偿的方法,完成了对相位的校正,并利用扩展Hough变换提取出了目标的微动参数。最后通过仿真实验验证了文中所提方法的有效性。The model of micro-motion targets of Symmetrical Triangular LFMCW （STLFMCW）radar is provided.Based on the micro-motion model,the characteristics of the echoed signal are analyzed and the form of the micro-Doppler signal is obtained.The phenomenon that the micro-motion target＇s continuous moving during the scan period will induce the widening and deviation of micro-Doppler curves is discussed. To solve this problem,a method for removing the widening and deviation of the micro-Doppler curves is proposed.The echo phases can be compensated by using this method.Then,the parameters of micro-motion target are extracted by the extended Hough transform.The simulation experiment validates the effec-tiveness of the proposed method.

关 键 词：对称三角线性调频连续波 微多普勒特征 微动 展宽 走动 

分 类 号：TN957.52[电子电信—信号与信息处理]