功率反演算法迭代步长的估算方法

Estimation of Step-size Parameter in Power Inversion Algorithm

理论土功率反演（PI）算法迭代步长的取值范围，是由信号自相关的最大特征值决定，但在工程实现中为了减少计算量，降低硬件复杂度，常采用近似算法，即用自相关矩阵的迹代替最大特征值，缩小迭代步长的取值范围。本文介绍了另一种近似算法，它只需对一个通道的接收数据进行处理．仿真表明这种算法相对于求自相关矩阵特征值、迹等方法，可以得到相近的干扰抑制结果，且其计算量会相对减小．

In theory,the step-size parameter of power invertion algorithm is decided by the maximum eigenvalue of the correlation matrix.However,in practical project,some estimation are sdopted to reduce the complexity of compute and hardware.Mostly,we compute the trace of the corrclation matrix instead of the eigenvalue,which can reduce the range of the step-size parameter.In this paper ,we introduce another method,which can cstimate the range using one antenna channel recelved data.In simulation,we compared the method with others.The new method can reduce the complexity and receive good performance.