7元圆阵高维空时自适应滤波的快速实现

An Implementation of Space-time Adaptive Filter Based on 7-element Circular Array

本文在联合空时处理框架下,在基于共轭梯度算法(CG)的MSNWF基础上,讨论了7元圆阵高维空时自适应滤波的快速实现问题。通过分析空间中7元圆阵的阵列平行四边形关系(APR),得到简化信号协方差矩阵计算的方法,通过分析信号协方差矩阵的Toeplitz特性,提出加快信号协方差矩阵与矢量相乘的方法,并最终得到了一种7元圆阵条件下的高维空时自适应滤波的快速实现方法,并且比较了新方法与原有方法的计算量。

The implementation of STAP on 7-element circular array is discussed in this paper. This implementation is under con- dition of MSNWF based on the Conjugate Gradient （CG）. We find a simplified method to get the observation eovariance matrix by utili- zing the array parallelogram relation （APR） of the 7-element circular array. We also find it easy to get the product between the covari- ance matrix and a vector by utilizing the topelitz feature of the eovarianee matrix. The comparison of computational complexity showed that the new implementation is efficient.