Polarization Time Reversal Detector with the Time- varying Channel

Polarization diversity radar enhances the performance of target detection. Time reversal exploits the multipath effect by adaptive matching propagation channels to improve the signal-to-noise ratio (SNR) and realize high detectability. This paper combines polarization diversity and time reversal technology to propose a time reversal detector suitable for polarization array radar. We carry out the maximum likelihood estimate for the time-varying channel response to solve the channel mismatch problem, which may cause the degradation of time reversal performance. The polarization detector we proposed can take advantage of the channel variations to improve the detectability, and the greater the energy brought by the channel changes, the better the detection performance achieved.