一种改进的SMI波束形成算法

Improved SMI Algorithm

协方差矩阵求逆(SMI)波束形成算法利用协方差矩阵求逆的方法求得权值,其收敛速度快,但是当期望信号信噪比增加时,算法性能急剧下降。本文提出一种改进的SMI算法,它增加了一个可以调节这种波束形成器权向量中的增强因子,从而使算法在期望信号信噪比增加的条件下也实现。

The SMI algorithm has fast convergence rate and obtains the weight vector via the inverse of covariance matrix, but its performance will drop suddenly when the SNR for desire signal is high. The paper presents an improved SMI algorithm, it adds the enhancing factor, which can adjust the weight vector of SMI, and its performance will not drop when the SNR for desire signal is high without the decrease of SIR.