一种非均匀环境中双端口干涉SAR/GMTI杂波抑制算法  

A Clutter Suppression Algorithm for Two-Port Interferometric SAR/GMTI in Heterogeneous Environment

作　　者：吴迪[1] 朱岱寅[1] 朱兆达[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,江苏南京210016

出　　处：《电子学报》2010年第9期2179-2183,共5页Acta Electronica Sinica

摘　　要：本文针对非均匀环境对杂波抑制干涉SAR/GMTI系统的影响,提出了一种新的自适应杂波抑制算法,利用系统参数、成像几何关系以及接收通道误差推算空域对消权系数的先验值,并将其作为约束条件来控制自适应算法的求解,从而得到对消权系数较为准确的估计值.实测数据处理结果表明,此算法能够在非均匀环境中有效地降低权系数的估计误差,从而达到满意的杂波抑制效果.是一种实际可行的双(多)端口杂波抑制方案.According to the performance loss of a clutter suppression interferometric synthetic aperture radar ground moving target indication（SAR/GMTI） system caused by the heterogeneous environments,this paper proposes an adaptive clutter suppression algorithm.In the proposed algorithm,the priori form of the spatial cancellation weight concerning a certain pixel is calculated by using the knowledge of system parameters,imaging geometry and array errors and performs as a constraint to the process of adaptive weight solving.Estimated value of the cancellation weight with high accuracy can be obtained consequently.Experimental results are employed to verify the improved performance of clutter mitigation and the feasibility of this algorithm.

关 键 词：合成孔径雷达 地面动目标指示 杂波抑制干涉 恒虚警检测 非均匀 

分 类 号：TN957.51[电子电信—信号与信息处理]