稳健的宽带自适应相干干扰抑制波束形成算法  

Robust Wideband Adaptive Beam-Forming Algorithm to Suppress Coherent Interferences

作　　者：丁永超[1] 刘成城[1] 赵拥军[1] 陈辉[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2014年第3期331-336,共6页Journal of Information Engineering University

基　　金：国家863计划资助项目(2012AA7031015)

摘　　要：针对期望信号存在指向误差和多个相干干扰时Duvall结构波束形成器性能下降问题,提出一种稳健的宽带自适应相干干扰抑制波束形成算法。该算法首先将Duvall结构波束形成器与最差性能最优波束形成算法结合,实现稳健的宽带波束形成,然后利用空间响应变化约束(SRV)将宽带波束形成等效为参考频点的波束形成,通过协方差矩阵重构,在相干干扰数目较多时,输出波束仍可以在相干干扰方向自适应地形成零陷。理论分析与仿真实验表明,该算法能够有效抑制多个强相干干扰,具有较好的稳健性。To improve the performance of Duvall-structure beam-former in the presence of both direction of arrival （DOA） estimation errors and more than one coherent interference, a robust wideband adaptive beam-forming algorithm to suppress coherent interferences is proposed. Firstly, the robustness of the proposed algorithm is improved based on the use of worse-case performance optimization method. Then the optimum beam-forming is performed based on the spatial response variation （SRV） constraints and covariance matrix reconstruction. This algorithm can be adaptively null in the direction of coherent interference when the number of coherent interference is more than one. Analysis and simulation results show that the algorithm can suppress two or more strong coherent interferences, attain better robustness.

关 键 词：宽带波束形成 相干干扰 稳健性 Duvall结构 空间响应变化 

分 类 号：TN911.7[电子电信—通信与信息系统]