不确定权值下的鲁棒波束形成算法  

Robust beamfoming algorithm with uncertain weights

作　　者：刘春静 张曙[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《系统工程与电子技术》2009年第8期1827-1830,共4页Systems Engineering and Electronics

摘　　要：提出了一种不确定权值下的鲁棒波束形成算法(robust beamforming algorithm with uncertainweights,RBAWUW),与以往文献中对阵列导向矢量的不确定性进行约束的方法不同,该算法是通过对权值附加一个球形或椭球形不确定集约束推导出来的。在这种新的约束下,RBAWUW算法能获得比传统鲁棒Capon波束形成器(robust Capon beamformer,RCB)更高的输出信干噪比(singal-to-noise-plus-interference ratio,SINR),而且新算法与标准Capon波束形成算法的计算效率几乎相同。理论分析和仿真结果均表明,RBAWUW算法是切实可行的。A robust beamforming algorithm with uncertain weights （RBAWUW） is proposed. Unlike the constraints on the uncertainty of the array steering vector used in other documents, the proposed method is derived by adding a spherical or ellipsoidal set constraint on the uncertain weights. With this novel uncertainty constraint, the presented RBAWUW achieves a higher output signal-to noise-plus-interference ratio （SINR） compared with the conventional robust Capon beamformer （RCB）. Furthermore, the new algorithm can be efficiently computed at a comparable cost with the standard Capon beamformer. Both theoretical analysis and simulation results show that the RBAWUW method is effective and applicable.

关 键 词：鲁棒 波束形成 自适应权值 不确定集 

分 类 号：TN911[电子电信—通信与信息系统]