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在雷达检测接收机之输入端的目标信号的平均功率与不需要的信号的平均功率之比,通过采用某些基于利用回波极化状态的自适应信号处理方法,而有可能大大提高。不需要的雷达回波的抑制通常是通过一个双极化雷达信号的矢量处理而获得的,这等效于使接收天线的状态自适应于不需要的环境状况。在本文中,在讨论某些关于部分极化的不需要的雷达回波的自适应对消概念之后,分析一种新的非线性自适应极化对消器的工作与性能。这种对消器在存在阻塞干扰或降雨杂波情况下可用于改善信号一干扰比。在文末,展示了某些与实验双极化雷达数据有关的结果。
The ratio of the average power of the target signal at the input of the radar detection receiver to the average power of the undesired signal is likely to be greatly increased by using some adaptive signal processing methods based on the use of echo polarization states. The suppression of unwanted radar echoes is usually obtained by vector processing of a dual-polarized radar signal, which is equivalent to adapting the state of the receiving antenna to unwanted environmental conditions. In this paper, we discuss the operation and performance of a new nonlinear adaptive polarization canceller after discussing some concepts of adaptive cancellation of unwanted radar echoes for partially polarized waves. This canceller can be used to improve the signal-to-interference ratio in the presence of jamming or rain clutter. At the end of the article, some results related to experimental dual-polarization radar data are shown.