基于辅助天线的变极化干扰对消算法研究

Research on Variable Polarization Interference Cancellation Algorithm Based on Auxiliary Antenna

针对雷达无法对抗变极化干扰的问题,提出了构建全极化辅助天线提取干扰极化状态,从而实现极化对消的方法。分析了快变极化干扰的接收问题,并建立模型,理论推导了对慢变极化干扰的对消算法。仿真结果表明,该算法对慢变极化干扰可取得较好的效果。随着极化变化速度的加快,其干扰效果类似噪声压制干扰,故无法准确提取干扰的极化状态,难以实现对消。

Considering the fact that radar could not resist variable polarization interference, a method was proposed to extract interference polarization state by constructing fully polarized auxiliary antenna to realize the polarization cancellation. The reception problem of fast var- ying polarization interference was analyzed, and the model was established, then the cancellation algorithm of slowly varying polarization in- terference was derived theoretically. The simulation results showed that the proposed algorithm could achieve good effect on slowly vatting polarization interference. With the increase of the polarization speed, the jamming effect was similar to the noise suppression interference, so it could not extract the polarization state of the interference accurately, and it was difficult to realize the cancellation.