In this paper, we propose a target detection and localization method on distributed monopulse arrays for tracking radar. An optimized mainlobe jamming (MLJ) cancellation filter was designed by maximizing the power ratio of the received siackgnal to the jamming-plus-noise. By exploiting the different correlation characteristics between the target echo and MLJ on distributed antennas, the designed filter is able to cancel MLJ and maintain the target echo. By applying the identical filter on sum-difference beams, MLJ can be cancelled, and the monopulse ratio can be maintained simultaneously. Hence, we simply detect and locate the target on the filtering output of sum-difference beams according to the monopulse principle. Monte Carlo simulations demonstrated that the proposed filter outperforms the conventional algorithms.

本文提出了一种用于跟踪雷达的分布式单脉冲阵列目标检测与定位方法。通过最大化接收信号与干扰加噪声的功率比，设计了优化的主瓣干扰（MLJ）消除滤波器。通过利用分布式天线上目标回波和MLJ之间的不同相关特性，设计的滤波器能够消除MLJ并维持目标回波。通过将相同的滤波器应用于和差光束，可以消除MLJ，并且可以同时保持单脉冲比。因此，我们根据单脉冲原理简单地将目标检测并定位在和差光束的滤波输出上。蒙特卡洛仿真表明，所提出的滤波器优于传统算法。