Research on imaging coordinate system of time-domain algorithm in BI-SAR system

The time-domain imaging algorithm can meet the imaging requirements of bistatic synthetic aperture radar(Bi-SAR) system with flexible and complex configurations, and establishing the imaging coordinate system is the key step especially for Fast Time-Domain algorithms. In this paper, to simplify the establishment of imaging coordinate system, the orthogonal elliptical mapping polar (OEMP) coordinate system is proposed and used in the frame of the fast factorized back projection(FFBP) algorithm. Compared to the orthogonal elliptical polar(OEP) coordinate system, the proposed coordinate system has simpler coordinate solving, and can also reduce the computational burden of the FFBP algorithms. The applicability and performance of the OEMP-based FFBP algorithm is verified through simulation experiments.