一种快速的特征空间自适应波束形成算法

特征空间自适应波束形成（EBAB）算法的权向量是线性约束最小方差（LCMV）波束形成器的权向量在信号干扰子空间上的投影，因此需要计算量巨大的特征分解。基于信号干扰子空间投影矩阵可利用阵列协方差矩阵进行高精度的有理近似的思想，提出一种快速计算自适应权向量的算法。理论分析和计算机仿真表明，在信号干扰子空间维数已知时，该算法的性能同EBAB算法一致，同时该算法对子空间维数过估计不敏感。

A Fast Eigenspace-Based Adaptive Beamforming Algorithm

Since the EBAB algorithm's weight vector is obtained by projecting weight vector of linear constrained minimum variance(LCMV) beamformer onto signal interference subspace,the time-consuming eigenvalue decomposition is required. By utilizing the idea of rational invariant subspace approximation,the signalinterference subspace projection matrix could be obtained fast from the array correlation matrix and then the adaptive weight vector could be computed fast.When the dimension of signal interference subspace ...