Efficient strip-mode SAR raw signal simulation of mixed targets based on accurate 2-D spectrum

The ground moving targets identification (GMTI) is one of the most important applications for SAR, the performance of the GMTI system can be analyzed and evaluated by modeling the whole system through simulation method. The raw signal generation in the time domain by the target-by-target method achieves a realistic simulation but not efficient. As for the issue, the accurate 2-D spectrum for moving target is derived and an efficient strip-mode SAR raw data simulation including fixed and moving targets is proposed in this paper. The processing steps of the simulation are given in detail and its computational complexity is analyzed. Finally, the simulation data for static and moving targets are processed and analyzed, and the results are given to validate the effectiveness of the proposed approach.