A Range Super-Resolution Scheme Based on Polarimetric Partially Coherent Radar

Abstract

Partially coherent radar unties range resolution from bandwidth limitations, enabling range resolution performance of the radar far beyond the Rayleigh resolution limit. However, based on traditional methods, there are still some problems with this radar, such as target detection performance is sensitive to the signal carrier frequency and assumptions of a moving target echo model are too ideal. By extending the signal model, adopting a 3-D echo characterization method, and proposing a more accurate echo model for moving targets, the problems have been solved effectively. In addition, a feasible range and Doppler compensation scheme is presented. In particular, by changing the polarization flexibly, the detection and resolution capability of the polarimetric partially coherent radar for multiple targets with different scattering abilities has been enhanced significantly. The simulation and experimental results fully prove the effectiveness of the aforementioned work. The scheme proposed in this article is expected to further reduce the signal bandwidth in applications that require high range resolution performance, such as autonomous cars, airborne radar systems, aerospace imaging, and so on.