基于投影权优化的双基地MIMO雷达杂波抑制方法  

Weighted Projection Optimization for Range-dependent Clutter Suppression in Bistatic MIMO Radar

作　　者：党博[1] 廖桂生[1] 李军[1] 柴睿[1] 粟嘉[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071

出　　处：《电子与信息学报》2013年第10期2505-2511,共7页Journal of Electronics & Information Technology

基　　金：国家973计划项目(2011CB707001);国家自然科学基金(61271292)资助课题

摘　　要：在正侧视双基地MIMO雷达中,所有杂波均位于由发射空间角频率、接收空间角频率和多普勒频率所构成的3维空间的同一个平面上。该文利用这一特性,提出一种基于投影权优化的双基地MIMO雷达杂波抑制方法。该方法首先对杂波谱坐标系进行旋转,使得杂波谱在新坐标系下的几何投影是距离独立的。然后以输出信干噪比(SINR)为代价函数对投影权进行优化,以提高杂波抑制性能。最后,通过将该非线性优化问题转换为一个半正定规划(SDP)问题,可以高效地对投影权进行求解。仿真结果表明该方法可以有效地消除杂波的距离依赖性,提高地面动目标检测性能。In bistatic MIMO radar system, all the clutter ridges are located in the same plane of the three-dimensional space. By using this characteristic, a weighted projection optimization based range-dependent clutter suppression method is presented. The coordinates of the clutter spectra are first rotated through a special angle. Then the projection weights are optimized by maximizing the output Signal-Interference-Noise Ratio （SINR） to transform the 3-Dimensional （3D） range-dependent clutter to 2D range-independent. Furthermore, the resultant nonlinear optimization issue is reformulated as a Semi-Definite Programming （SDP） one, which can be solved very efficiently. Analysis of simulation indicate that the proposed method is easy to implement and can cancellthe range-dependent clutter effectively.

关 键 词：双基地雷达 多输入多输出 空时自适应处理 距离依赖性 半正定规划 

分 类 号：TN959.73[电子电信—信号与信息处理]