Abstract: On the basis of time-area arithmetic and frequency-area arithmetic based on FFT of echo simulation of spaceborne Synthetic Aperture Radar（SAR），the parallel arithmetic of SAR echo simulation is investigated.Based on the platform of PC forming cluster，adopting corresponding regulation of SOCKET in transferring message and data，the parallel method is actualized.By analysis of accelerated performance，the parallel method is proved effective in accelerating the course of echo simulation，and Chirp Scaling（CS） arithmetic is used to imaging to the simulated data testified the validity of the parallel arithmetic.

Key words: spaceborne SAR, echo parallel simulation, cluster computing, SOCKET

摘要： 在星载合成孔径雷达（SAR）回波仿真时域算法和基于FFT的频域模拟算法的基础上，对星载SAR回波仿真的并行化算法进行了研究。基于通用计算机平台构成机群，采用SOCKET通信机制进行消息传递及数据传送，实现了回波仿真的并行化处理。通过对并行算法加速性能的分析，证明了该算法能有效地加速回波仿真的进程。利用Chirp Scaling（CS）算法对仿真数据进行成像，验证了该算法的有效性。

关键词: 星载SAR, 回波并行仿真, 机群计算, SOCKET