运动平台下频率步进雷达杂波相消新方法  

A Novel Method of Clutter Cancellation for Mobile Stepped-frequency Radar

作　　者：王飞行[1] 贺思三[1] 陈建军[1] 付强[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2010年第3期69-74,共6页Journal of National University of Defense Technology

基　　金：国家部委重点基金资助项目(6140521)

摘　　要：相消处理是一种典型而又简单易行的杂波滤除方法。针对频率步进雷达,提出一种新的杂波相消方法,它利用同一距离单元上两帧回波脉冲所成的两幅高分辨距离像(HRRP)进行杂波相消。通过合理地选择帧间隔数,该方法能够很好地保持目标HRRP特性。针对雷达平台运动所导致的两幅HRRP之间杂波移位和成分改变问题,又提出了先利用杂波相关性进行杂波对齐后再相消的解决方法。仿真结果验证了所提方法的有效性。Cancellation processing is one kind of classical and feasible idea for the purpose of cancelling clutter. A novel method of clutter cancellation for stepped-frequency radar was proposed. Transmitting the basic stepped-frequency waveform,the radar achieves two high resolution range profiles （HRRP） that were produced by the Inverse Discrete Fourier Transform （IDFT） of two frames of return pulses on a same range cell. The two HRRPs which the number of frame interval was chosen rationally were utilized to cancel the clutter,which can keep the HRRP property of a target. To resolve the problems of the clutter shift and the clutter component change induced by the radar platform movement,a strategy was also brought out. The clutter of two HRRPs was aligned by the clutter correlation and then was cancelled. The simulation results validate the correctness of the method.

关 键 词：杂波相消 频率步进雷达 高分辨距离像 运动平台 

分 类 号：TN957[电子电信—信号与信息处理]