通道幅相误差快速校正算法在空时自适应处理中的应用

Implementation of Fast Algorithm for Channel Gain and Phase Error Calibration in Space-Time Adaptive Processing

雷达系统不可避免地存在通道幅相误差,导致空时自适应处理算法的性能下降。本文将通道幅相误差快速校正算法应用到空时自适应处理中,根据等距线阵杂波协方差矩阵的块Toeplitz-Toeplitz块结构在通道误差的影响下将改变这一特性,对通道幅相误差进行估计,并分析了空时自适应处理中有限样本数对算法性能的影响。仿真结果验证了该算法在空时自适应处理中的有效性。

The channel gain and phase errors are inevitable in radar systems and the result in performance degrading of space-time adaptive processing （STAP） algorithm. In this paper, the fast algorithm for the channel gain and the phase error calibration is applied to STAP to estimate the channel errors according to the property. The clutter covariance matrix of linear equispaced arrays based block Toeplitz with Toeplitz block （BTTB） will change on channels errors. The effect of the limited sample on the algorithm performance in STAP is also analyzed. Simulation results demonstrate the effectiveness of the method.