极化滤波技术的有效性研究

Validity of polarization filtering technique

极化滤波技术在高频雷达抗天波干扰等领域有着广泛的应用 ,结合实际雷达测得的目标回波和干扰回波矢量数据 ,对极化滤波误差产生的原因、减小误差的方法以及利用极化滤波方法提高信干比的有效性进行了详细分析 .结果表明 ,极化滤波的效果取决于目标、干扰信号的极化状态 .在实际应用中为提高极化滤波器的滤波效果 ,增强对干扰信号的抑制能力 ,要选择最佳极化状态 。

Polarization filtering technique is widely used in many fields, for example interference suppression of sky wave in HF radar. Based on the actual wave data of both signal and clutter, the cause for generation of error, way of error reduction and improvement of SIR by using polarization filtering technique are discussed. It can be concluded that the validity of polarized filter depends on the polarized states of the target and that of the interference. In order to improve the effect of a polarization filter and the capability of suppressing clutter, it is important to select the best polarization state and reduce as much the estimate error of clutter's polarization state as possible.