有源干扰条件下机载MIMO雷达降维STAP方法  

A Reduced-rank STAP Method for Airborne MIMO Radar Under Jamming Condition

作　　者：王珽[1] 张剑云[1] 郑志东[1] 

机构地区：[1]合肥电子工程学院502教研室,合肥230037

出　　处：《现代雷达》2013年第8期37-42,65,共7页Modern Radar

摘　　要：针对机载多输入多输出雷达杂波与干扰的同时抑制问题,提出一种降维空时自适应处理方法。首先,利用系统参数离线简便构造出杂波子空间,然后,根据杂波基向量与干扰基向量的关系,对杂波加干扰协方差矩阵的秩进行分析。当存在有源干扰时,系统的杂波与干扰自由度进一步提高。最后利用干扰加噪声协方差矩阵的块对角结构,结合离线构造的杂波子空间,通过迫零方法进行空时自适应权矢量求解。该方法能够有效降低运算复杂度,具有接近全维最优处理的杂波与干扰抑制性能。A reduced-rank space-time adaptive processing （STAP） method for simultaneous clutter and jamming suppression in airborne multiple-Input Multiple-Output （MIMO） radar is proposed. Firstly the clutter subspace is constructed off-line and conveniently by using radar system parameters. Then the covariance matrix rank of clutter plus jamming is analyzed based on the relationship between clutter basis vectors and those of jamming. The clutter plus jamming degree of freedom improves when there exist jammers in radar system. Finally the space-time adaptive weight vector is obtained by zero-forcing method utilizing the block-diagonal structure of jamming plus noise matrix and the off-line constructed clutter subspace. The proposed method can efficiently reduce the computational complexity and provide a near full dimensional optimal adaptive processing performance for clutter plus jamming suppression.

关 键 词：多输入多输出雷达 空时自适应处理 降维 有源干扰 杂波子空间 矩阵秩分析 

分 类 号：TN959.73[电子电信—信号与信息处理]