Full-Polarization Baseband Echo Simulation of Space Targets for Bistatic Radar

Due to the high cost of obtaining echo data for space targets in real cases, most of the research usually relies on the simulation. The electromagnetic (EM) calculation is well known as one of the simulation tools. In this letter, the relationship between the calculated complex radar cross-section data and the baseband echo signal is analyzed. Then, the difference in the polarization reference plane of the radar coordinate system and EM calculation coordinate system is pointed out. For simulating the baseband echo signal with full polarization, the scattering matrix obtained by EM calculation should be rotated according to the radar position, the target position, and the target attitude. At last, a simulation of the baseband echo signal with full polarization for a cone-shaped target is given to verify the simulation algorithm.