参数估计误差对极化滤波性能影响分析

摘要

回波极化参数在自适应估计过程中必然存在误差,这会对虚拟极化滤波性能造成不利影响,而现有文献很少涉及对此问题的讨论.首先介绍了虚拟极化滤波的原理,分析了理想情况下的虚拟极化滤波性能,仿真分析表明虚拟极化滤波对增强目标与干扰抑制有很好的效果；同时对极化参数估计误差对虚拟极化滤波性能的影响进行了分析,讨论了不同情况下极化参数估计误差对信干比改善因子与目标增强因子的影响,对其进行了仿真分析,为虚拟极化滤波参数设置提供了理论依据.%There is error existing in adaptive estimation process of echo polarization parameters , which will have adverse effect on the performance of virtual polarization filter. The existing literature rarely discussed about this problem. This paper analyzes the basic principle of virtual polarization filtering and the ideal virtual polarization filtering performance. The simulation results indicate that virtual polarization filtering can improve the performance of enhancing target and suppressing interference very well. The influence of polarization parameter estimated error on the performance of the virtual polarization filter is analyzed and the influences of polarization parameter estimated error on the signal to jamming ratio improvement and the target enhancement in different cases are discussed. Simulation analysis is made, which provides the theory basis for virtual polarization filtering parameter settings.