高频地波超视距雷达的极化滤波技术研究

Study of the Polarization Filtering Technique of HF Ground Wave Radar

在极化域内分析了按输出干扰最小为原则的极化滤波算法固有的抗干扰能力 ,指出了其抗干扰能力的有限性。对高频地波超视距雷达抑制天波电台干扰问题进行了研究。提出了单通道加权法 ,有效地减小了极化不匹配损失 ,提高了极化滤波的抗干扰能力。最后讨论了实际系统中 ,天线的去极化作用及其补偿方法。

In this paper the intrinsic interference suppression ability of polarization filtering algorithm is analyzed in the rule of minimum interference output in polarization domain. The analysis shows that the interference suppression ability is very limited. An algorithm of weighting in the horizontal polarized channel is proposed which is effective to reduce the polarization mismatch loss and to improve the interference suppression ability of polarization filter in HF ground wave OTH radar. At last the antenna depolarization and its compensation method are discussed.