天基多载频稀疏阵STAP方法的幅相误差影响  

Analysis of Amplitude and Phase Errors on STAP for Multi-Carrier-Frequency Space Based Sparse Array

作　　者：康雪艳[1] 江碧涛[2] 张云华[1] 云日升[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190 [2]北京市遥感信息研究所,北京100011

出　　处：《测试技术学报》2009年第3期221-225,共5页Journal of Test and Measurement Technology

摘　　要：地面动目标检测(GMTI)是天基分布式雷达的重要应用之一,采用多载频模式可有效减少孔径稀疏引起的动目标检测盲区,提高GMTI性能.针对多载频天基稀疏阵雷达的空时自适应处理(STAP)方法,基于多通道幅相误差模型,推导了多载频模式下存在幅相误差的杂波协方差矩阵表达式.通过仿真分析了幅相误差对多载频稀疏阵最优STAP方法的影响.Ground moving targets indication（GMTI） is an important application of space based distributed radar.The MTI blind zones caused by sparse array can be effectively reduced by using multi-carrier frequency so that GMTI performance can be improved.Based on the model of channel amplitude and phase errors for multi-carrier-frequency space based sparse array,the clutter covariance matrix expression with errors was derived,and the impact of amplitude and phase errors on optimal STAP was investigated through simulations.

关 键 词：天基稀疏阵 地面动目标检测 幅相误差 多载频 空时自适应处理 

分 类 号：TN958[电子电信—信号与信息处理]