Abstract:The echo simulator is of great significance to the research on Synthetic Aperture Radar (SAR), whereas it costs massive computation. In order to realize fast simulation of SAR echo, the Field Programmable Gate Array(FPGA) is adopted as the kernel chirp to design the digital signal processing board specially used in SAR echo simulation. The simulation algorithm is realized on the board by programming. The application result shows that the realization of SAR echo simulator based on FPGA can greatly accelerate the simulation speed and significantly reduce energy consumption.