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为了解决GPS辐射源雷达各通道干扰抑制不彻底和计算量较大的难题,提出了基于分块子空间投影的干扰抑制方法,并对其性能进行分析.将回波通道的接收信号均匀分块后并行处理.首先,将信号投影到干扰子空间的正交补子空间内,完成多径干扰抑制;然后,给出强目标回波旁瓣干扰存在的判断准则;最后,将信号投影到强目标子空间的正交补子空间内,完成强目标回波旁瓣干扰抑制.仿真结果表明:与已有的子空间投影法相比,该方法干扰抑制更彻底、计算量更低、更适合实际应用.
In order to solve the problem that the interference suppression of each channel of GPS radiant source radar is not complete and the calculation is large, an interference suppression method based on partial subspace projection is proposed and its performance is analyzed. The received signals of echo channels are evenly divided After parallel processing.Firstly, the signal is projected into the orthogonal complement space of the interfering subspace to complete the multipath interference suppression. Then, the criterion for judging the existence of sidelobe interference of the strong target echo is given. Finally, the signal is projected to strong The target sidelobe space quadrature complement subspace completes strong target echo sidelobe interference suppression.The simulation results show that this method has more complete interference suppression and lower computational complexity than the existing subspace projection method and is more suitable for practical application.