相控阵雷达抗混合干扰算法研究

Study of Mixed Jamming Suppression Algorithm for Phased Array Radar

针对复杂环境中包含强压制式干扰与欺骗式干扰的混合干扰导致雷达抗干扰能力下降且目标检测不准确等问题,提出了一种基于旁瓣相消算法的抗混合干扰方法。通过分析相控阵雷达抗干扰技术的特点,发现将旁瓣相消算法可抑制压制式干扰的原理应用到各辅助通道信号传输过程中,能解决欺骗式干扰因压制式干扰功率过大而被淹没的问题,达到旁瓣匿影有效对抗欺骗式干扰的目的。通过仿真分析可知,该方法可有效降低混合干扰信号对雷达目标信号的影响,提高混合干扰环境下目标检测性能。

In complicated environments, there is mixed jamming including stronger blanket jamming and deception jamming. It led to inaccurate detection of targets, low anti-jamming ability of radar and so on. Therefore, the anti-mixed jamming algorithm based on side-lobe canceller was put forward. The principal of side-lobe canceller suppressing blanket jamming could be applied to the transmission of every auxiliary channel through the analysis of the phased array radar anti-jamming techniques. It was able to suppress the stronger blanket jamming in auxiliary channels, so that it can resolve the problem that high-power blanket jamming floors deception jamming and achieve the goal that side-lobe blanking suppress deception jamming after filtering and detecting. The simulation result shows that the stronger blanket jamming and the distance deception jamming are suppressed and the radar target is detected. This algorithm can reduce the mixed jamming＇ s impact on radar target and enhance the detection ability of target.