Efficient translational variant bistatic SAR raw data generation based on 2D inverse Stolt mapping

The generation of SAR echo is very important for both the system design and the validity test of imaging algorithm. Common time-domain-based echo generation methods are usually time-consuming and inefficient. Hence, this article will focus on the research of efficient echo generation methods. In translational variant bistatic mode, two-dimensional (2D) spatial variability is the major problem to be faced with in efficient echo generation. To solve this problem, this paper proposes an efficient echo generation method of translational variant bistatic SAR based on 2D inverse Stolt mapping. The proposed method first uses 2D FFT to generate 2D linear spectrum, and then completes nonlinearized operation of the spectrum by 2D inverse Stolt mapping. This process fully considers the 2D spatial variability in translational variant bistatic mode, which guarantees the accuracy of the generated echo. Finally, simulation results are presented to verify the validity of the proposed method.