Angle glint suppression for millimeter-wave radar based on polarization filtering

For the millimeter wave radar, angle glint of extended targets is the main angle error. A new kind of dual polarization wide band millimeter wave radar is proposed and a glint suppression technology based on polarization filtering is studied in this paper. Firstly the echo-signal is processed into one dimension range profile based on high range resolution of millimeter wave radar and the effective strong scattering centers are detected, secondly the polarization filtering is used to the signals in the range cell where the scattering centers exist in order to suppress clutter and increase the angle measurement precision of single scattering center, finally the angle of each scattering center is measured by amplitude sum/difference and the target average angle is obtained by weighting all the scattering centers, which can realize the correct track on the target. Theoretical analysis and simulation results indicate that the technology can obviously increase the angle measurement precision of the whole target.