摘要
该文针对常规Capon波束形成易受期望信号导向矢量失配影响,研究了基于导向矢量误差不确定集的稳健Capon自适应波束形成算法。推导出期望信号导向矢量属于球形不确定集时的自适应权矢量近似闭式解,并由此进行性能评估,得到目标功率估计和输出信号干扰噪声比的近似表达式,从而明确了各种因素对性能的影响关系。计算机仿真结果证明了该文分析的合理性。
Since standard Capon beamformer is susceptible to the steering vector mismatches of the Signal Of Interest（SOI）, robust Capon beamforming based on steering vector error uncertainty set is investigated. In the cases that the practical steering vector belongs to a spherical uncertainty set, an approximate closed-form solution to the weight vector is derived with a series of approximate deductions. With the solution, the approximate expressions of the target＇s power estimation and the output signal-to-interference-plus-noise ratio are presented for analysis evaluation, which provides insights into the influence factors on performace. The simulation results demonstrate the reasonability of the analysis in this paper.
出处
《电子与信息学报》
EI
CSCD
北大核心
2009年第12期2931-2936,共6页
Journal of Electronics & Information Technology
