基于导向矢量估计的鲁棒自适应波束形成算法  

Steering vector estimation based robust adaptive beamforming algorithm

作　　者：李洪涛[1] 陈诚[1] 曾文浩[1] 朱晓华[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《电波科学学报》2015年第1期188-193,200,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61301022)

摘　　要：针对在导向矢量存在误差情况下自适应波束形成算法性能严重下降的问题,提出一种基于导向矢量估计的鲁棒自适应波束形成(Steering Vector Estimation Based Robust Adaptive Beamforming,SVE-RAB)算法.算法用导向矢量不确定范围估计真实导向矢量,利用范数约束通过二阶锥规划技术提高波束形成的鲁棒性.算法可在导向矢量存在误差的情况下,对期望信号保持最大增益并有效抑制干扰,且有效提高了波束形成输出的信干噪比(Signal to Interference plus Noise Ratio,SINR).仿真结果验证了算法的有效性和优越性.To solve the degradation of robustness against array steering vector error in the adaptive beamformer,a novel steering vector estimation based robust adaptive beamforming(SVE-RAB)is proposed.The presented algorithm estimates the real steering vector according to the uncertainty of the array steering vector.Then,the robustness of the new beamforming is enhanced by using norm constraint on the array weight vector.The algorithm can keep the desired signal with the maximum gain with the interference being well suppressed in case of array steering vector error,thus considerable improving the output signal to interference plus noise ratio(SINR).Simulation results confirm the validity and superiority of the proposed algorithm.

关 键 词：波束形成 鲁棒性 导向矢量 

分 类 号：TN911.7[电子电信—通信与信息系统]