迭代更新导向矢量的稳健波束形成算法  

Steering Vector Iteratively Update for Robust Capon Beamformer

作　　者：倪淑燕[1] 程乃平[1] 刘童岭[2] 

机构地区：[1]装备指挥技术学院,北京101416 [2]中国卫星海上测控部,江苏江阴214431

出　　处：《电讯技术》2009年第11期66-70,共5页Telecommunication Engineering

摘　　要：稳健的Capon波束形成器(RCB)可以克服常规波束形成对导向矢量误差的敏感性,但其性能受导向矢量误差范围估计值的影响。为此,提出了一种不需要给定误差范围的稳健波束形成方法,利用导向矢量误差中与假想导向矢量正交的分量,将双约束RCB算法的优化问题转换为几个迭代的二次锥规划问题,逐次更新导向矢量以获得最优权,计算机仿真验证了方法的有效性。The robust capon beamformer （RCB） provides much more robust capabilities to the mismatch of the steering vector. However, its performance will suffer severe degradation if the norm of the mismatch vector is over or under estimated. To solve the problem, a modified algorithm which needn＇t estimate the norm of the mismatch vector is presented. The algorithm is performed iteratively to update the steering vector. At each iteration a quadratic convex optimization is solved, which is transferred from the double constrained RCB algorithm by searching the orthogonal component of the mismatch vector. Computer simulations demonstrate the effectiveness of the proposed algorithm.

关 键 词：阵列信号处理 波束形成 稳健性 导向矢量 

分 类 号：TN911.7[电子电信—通信与信息系统]