均匀线阵条件下的MSNWF空时处理快速实现方法

Fast implementation of MSNWF for uniform linear antenna arrays

针对利用MSNWF技术进行GPS的接收机联合空时抗干扰,可以得到较好的效果,但计算量仍然较大,不易硬件的实时实现的问题,通过分析信号协方差矩阵的Toeplitz特性,找到简化计算信号协方差矩阵的方法。并在信号协方差矩阵基础上,构造一个高维Toeplitz矩阵,利用FFT技术,提出一种加快信号协方差矩阵与矢量相乘的计算方法。把这两种快速计算方法应用于基于CG的MSNWF,大大降低了空时自适应处理的计算复杂度。给出新方法收敛性能试验仿真结果,证明该方法有效。

The MSNWF is a good implementation of the joint space-time adaptive anti jamming application for GPS receivers, But the computational burden is still considerable. Utilized the toeplitz feature of the covari ance matrix of the observation, a simplified method is presented to get the covariance matrix and a fast method to compute the multiplication between the covariance matrix and a vector. Based on the CG based MSNWF, a fast implementation is proposed by utilizing both fast methods presented above. The new implementation lowers the computational burden obviously. Finally, the simulation shows that the implementation is feasible and efficiency.