宽带数字阵列雷达孔径渡越和距离走动补偿技术  

Aperture Fill Phenomenon and Range Migration Compensation of Wideband Digital Array Radar

作　　者：井伟[1] 黄金杰[1] 姜洋[1] 肖占牛 

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2014年第3期12-16,共5页Fire Control Radar Technology

基　　金：装备预先研究项目(513070403)

摘　　要：宽带数字阵列雷达波束控制灵活,分辨率高,是雷达的一个发展方向。但是宽带宽角扫描会引起孔径渡越效应,影响波束合成的质量。另外,分辨率的提高会导致脉冲间距离走动,严重影响脉间相参积累的效果。本文分析了孔径渡越的形成,提出针对线性调频信号的回波延时补偿方法。研究了Keystone方法进行距离走动校正。Wideband digital array radar features high beam control agility and high range resolution, it is a develop-ment trend of future radar. However, the aperture fill phenomenon due to wideband and wide angle scanning may degrade the beam formation quality; and range migration among radar pulses caused by high range resolution will significantly impact pulse-to-pulse coherent accumulating gain. Reason of the aperture fill phenomenon is ana-lyzed and an echo delay compensation method for linear frequency modulation （ LFM） signal is proposed. Applica-tion of Keystone transformation in the linear range migration compensation is studied.

关 键 词：数字阵列 宽带高分辨 孔径渡越 距离走动 

分 类 号：TN95[电子电信—信号与信息处理]