基于FM广播照射源的无源雷达直达波干扰抑制

Direct-Path Interference Suppression for Passive Radar Based on FM Broadcast Illuminator

利用FM广播照射源的双基地雷达具有良好的“四抗”性能。对该体制雷达的特点:存在直达波干扰问题进行了分析;提出了空-时-频域的综合解决方案:即在空域内使用天线自适应干扰置零,在时域内通过通道均衡和自适应干扰对消以及在频域内进行长时间相干积累等技术;最后给出了基于FM广播照射源的一个实验系统,利用该实验系统采集的数据进行仿真,仿真结果验证了该方法的有效性。

Bistafic radar based on regarding FM broadcast as illuminator has potential ＂four countering＂ advantages. First of all, the disadvantage of this kind radar was introduced, with its direct-path interference, Secondly, a space-time-frequency domain solution to this problem was described： adaptive hulling array processing is considered in space domain, channel equalization and adaptive interference cancellation are used in time domain, furthermore, long-time coherent integration is provided in frequency domain. Finally, an experimental system was discussed by regarding FM broadcast transmitter as non-cooperative illuminator. Simulation results by real collected data show applying these method has better the performance of target detection.