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

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.