干扰极化捷变下的空域自适应滤波

雷达空域自适应滤波在应对极化捷变干扰时性能恶化, 因此研究了干扰极化捷变情况下, 雷达空域自适应滤波的性能。首先, 建立了极化捷变干扰的雷达阵列接收信号模型。其次, 对阵列接收数据构成的协方差矩阵进行研究, 得出一个干扰源在极化捷变时, 等价于两个不同方向的干扰源, 需消耗的雷达空域自由度为2的结论。进一步, 提出干扰极化捷变下的空域自适应滤波算法。最后, 试验验证了理论研究的合理性。

Spatial adaptive filtering of polarization agility jamming

Radar spatial adaptive filtering deteriorates in response to polarization agility jamming. So the performance of radar spatial adaptive filtering of polarization agility jamming is investigated. First, facing the polarization agility jamming, the signal model received by radar antenna arrays is established. Second, the covariance matrix from the receiving data is theoretically analyzed. One jamming source is equivalent to two jamming sources from two different directions and will consume 2 spatial freedoms of the radar. Moreover, the spatial adaptive filtering method is proposed with the polarization agility jamming. Finally, the rationality of the presented method is validated by experiments.