雷达最佳接收极化滤波优化研究

研究了雷达最佳接收极化滤波抗随机极化干扰的优化问题。当随机极化干扰的极化方式与目标回波的极化方式相近时，传统的最佳接收极化滤波方法在滤除干扰信号的同时，极大抑制了目标回波信号，导致信干噪比（SINR）降低。为解决传统最佳接收极化滤波存在的不足，提出收发联合极化滤波的优化方法。当目标回波和干扰有相近的极化方式时，通过对发射极化的捷变，改变目标回波信号的极化方式，从而避免目标信号的过度损失。与传统的滤波方法相比，该方法能获得更好的信干噪比。仿真结果表明了该滤波优化方法的可行性和有效性。

Optimization study of radar optimal receiving polarization filtering

The optimization of radar optimal receiving filtering for random polarization interference is studied. When the polarization mode of the random polarization interference is close to that of the target echo,while jamming signal is filtered and at the sametime,the target echo signal is inhibited by the traditional adaptive polarization filtering method,which leads to reduction of signal to interference noise ratio(SINR). A method of the joint of receiving and transmitting for polarization filtering is proposed to solve this shortage. The loss of target echo signal can be avoided by changing the polarization mode of target echo signal through the change of the emission polarization ones. The new method can get better signal to interference noise ratio than the traditional ones. The validity and feasibility of the joint of receiving and transmitting polarization filtering method is proved by the simulation results.