基于四阶累积量的稳健盲波束形成算法  

Fourth-order cumulant based on robust blind beamforming algorithm

作　　者：沈怡平[1] 滕升华[1] 

机构地区：[1]山东科技大学信息与电气工程学院,山东青岛266510

出　　处：《电波科学学报》2008年第6期1056-1060,共5页Chinese Journal of Radio Science

摘　　要：基于四阶累积量的盲波束形成算法在估计有用信号方向向量时存在估计误差,导致其构造的最小方差无失真响应(MVDR)波束形成器性能降低。针对此问题,借鉴子空间正交投影思想,提出一种基于四阶累积量的稳健盲波束形成算法。与原算法相比,稳健算法可有效提高有用信号方向向量的估计精度,改进算法的波束形成性能。计算机仿真验证了稳健算法的有效性。Fourth-order cumulant based on blind beamforming algorithm contained error in estimating steering vector of expected signal, which resulted in degraded capability of minimum variance distortionless response （MVDR） beamformer. Contraposing this problem and using the idea of subspace orthogonal projection, a fourth-order cumulant based on robust blind beamforming algorithm was proposed. Compared with the original one, this new robust algorithm can efficiently increase the estimation precision of steering vector of the expected signal. So the capability of blind beamforming is improved. Computer simulations have proved the validity of this robust algorithm.

关 键 词：四阶累积量 盲波束形成 方向向量 稳健性 

分 类 号：TN911.7[电子电信—通信与信息系统]