基于GPU并行处理的SAR回波仿真器设计方法  

Design Method of SAR Echo Simulator Based on Parallel Processing with GPU

作　　者：沈晓峰 吴文明[1] 田宏伟[1] 于希辰 SHEN Xiao-feng;WU Wen-ming;TIAN Hong-wei;YU Xi-chen(Applied Technology College,Soochow University,Suzhou 215000,China)

机构地区：[1]苏州大学应用技术学院,江苏苏州215000

出　　处：《测控技术》2019年第5期99-103,共5页Measurement & Control Technology

摘　　要：针对合成孔径雷达(SAR)设计了一种基于GPU的回波仿真器,使用并行计算的方法提高SAR回波模拟的效率。仿真数字回波信号通过数/模转换,转换为射频信号输出给SAR系统。使用了BP成像算法对仿真器模拟得到的点目标及分布式目标回波数据进行成像处理,验证了提出的SAR回波仿真器的有效性。实验分析表明,使用GPU并行处理的方法提高了SAR回波仿真的效率。A synthetic aperture radar( SAR) echo simulator based on GPU with parallel processing is designed. The efficiency of SAR echo simulation is improved by parallel computation. The simulated digital signal of SAR echo is converted to an RF signal by a digital-to-analog converter(DAC) and transmitted to the SAR system. BPA( back projection algorithm) was introduced to obtain the images of point target and distributed target whose echoes were acquired by using the SAR echo simulator, which validated the proposed SAR echo simulator design method. Experiments show that the proposed method improves the efficiency of SAR echo simulation compared with the CPU processing method.

关 键 词：合成孔径雷达 回波模拟器 并行计算 成像处理 

分 类 号：TN957[电子电信—信号与信息处理] TP79[电子电信—信息与通信工程]