GPS抗干扰接收机空时二维自适应滤波算法的FPGA实现

Implementation of STAP Algorithm Based on FPGA of Anti-jamming GPS Receiver

传统的抗干扰接收机存在自由度有限、抗多径干扰能力弱等不足。针对这些不足,有人提出了空-时二维自适应滤波(STAP)算法。文章介绍了空-时二维自适应抗干扰算法的性能、特点以及Matlab仿真和FPGA实现情况。文章没有使用通常使用的多级维纳嵌套(MSNWF)逼近方法,而是尝试采用矩阵直接求逆的方法来求出自适应系数。通过仿真和实测,此方法达到了较好的效果。文章的研究成果对通信对抗、雷达对抗都有重要的参考价值。

The traditional anti-jamming GPS receivers have lots of deficiency such as limited freedoms ,lack of resist multi-path interference. Aiming at these deficiency, people put forward the theory of Space-Time Adapt Processor（ STAP）. This paper introduces the performances ,Features of STAP（ space-time auto adapt） Algorithm and its simulation by matlah and its implementation on FPGA. This paper calculates the self-adapt coefficients by the means of direct matrix inversion instead of the usual means, MSNWF. The method of this paper takes satisfied effect after simulation and implementation. The results of this paper have great reference value to counterwork of communication and counterwork of radar.