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在无源雷达中,目标回波会受到强直达波、强多径的干扰,因此很难对其进行有效检测。为了解决这一问题,提出了一种基于子空间投影的干扰抑制方法,通过将接收信号投影到多径干扰的正交补子空间内,以消除强直达波和强多径干扰。仿真结果表明,该方法可以有效抑制强直达波、强多径干扰,检测出目标。
In passive radar, the target echo will be affected by strong direct wave, strong multipath interference, so it is difficult to effectively detect it. In order to solve this problem, an interference suppression method based on subspace projection is proposed, which can eliminate the strong direct wave and strong multipath interference by projecting the received signal into the orthogonal complement space of multipath interference. The simulation results show that this method can effectively suppress the strong direct wave and strong multipath interference and detect the target.