Bistatic forward-looking SAR interferometry

An innovative interferometry configuration, imaging and digital elevation mode (DEM) generation method via bistatic forward-looking synthetic aperture radar (BiFLInSAR) is addressed in this paper. The analytical relationship expressions between the interferometric phase and the topographic height are derived. In addition, for the space-variant features of BiFLSAR resolution and interferogram, an imaging method for BiFLInSAR focusing and DEM generation based on predicted back-projection algorithm is presented. Simulation results demonstrate the effectiveness of BiFLInSAR configuration and the presented method.