一种新的稳健Capon波束形成算法

A New Algorithm for Robust Capon Beamforming

针对常规Capon波束形成算法在期望信号导向矢量失配情况下性能的急剧下降,研究了一种新的基于导向矢量不确定集的稳健Capon波束形成算法。该算法通过对阵列接受信号的相关矩阵进行特征分解获得噪声子空间,使期望信号导向矢量在噪声子空间的投影最优。并且利用特征向量的结构特性推导出了最优对角加载量的解析表达式。仿真结果表明了理论分析的正确性和算法的有效性。

Since standard Capon beamformer is suffers from performance degradation in the presence of mismatch of the array steering vector of the desired signal. A new robust Capon beamforming algorithm based on the steering vector uncertainty set is investigated. By utilizing the noise subspace obtained by the eigen factorization of the correlation matrix, the projection of signal steering vector onto noise subspace is made to optimize. And an optimal solution of the diagonal loading is derived. The simulation results demonstrate its correctness and effectiveness.