An Efficient Continuous Imaging Framework for Bistatic SAR in Strip-map Mode

Abstract

Fast factorized back-projection (FFBP) is a clas-sic fast time-domain algorithm (FTDA) for bistatic synthetic aperture radar (BiSAR) in spotlight mode. However, when conventional FFBP is employed for BiSAR in strip-map mode, the processing efficiency for continuous imaging of multiple full-apertures will be decreased significantly. In this paper, an efficient continous imaging framework is developed for BiSAR in strip-map mode. In the proposed framework, echo data are divided into several full-apertures data blocks then processed separately by FFBP to reduce redundant BP operations, so that the new continuos imaging framework has the higher efficiency than conventional FFBP. Promising results from both simulation and raw data experiments are provided and analyzed to validate the high performance of the proposed algorithm.