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遥感技术与应用  2012, Vol. 27 Issue (2): 237-242    DOI: 10.11873/j.issn.1004-0323.2012.2.237
模型与反演     
GPU平台下针对SAR地面快视系统的RD算法优化与实现
杨仁忠,张 萄,林波涛,韦宏卫
(中国科学院对地观测与数字地球科学中心,北京 100094)
Optimization and Implementation of RD Algorithm in SAR Ground Quick Look System According to GPU Platform
Yang Renzhong,Zhang Tao,Lin Botao,Wei Hongwei
(Center for Earth Observation and Digital Earth,Chinese Academy of Sciences,Beijing 100094,China)
 全文: PDF(2121 KB)  
摘要:

针对SAR地面系统实时关键成像技术进行研究,采用GPU(Graphic Processing Unit)硬件平台CUDA(Computer Uniformed Device Architecture)编程模型,对传统合成孔径雷达的RDA(Range Doppler Algorithm)算法核心部分进行了针对性的设计与实现,并在GPU专用科学计算平台Tesla C1060上进行了实验。结果表明其处理速度是一台主流4核心8线程CPU的20倍以上,并且相对RadarSat\|1卫星可以达到10倍左右的实时率;基于GPU的处理方式较好地实现了SAR实时成像系统。

关键词: 合成孔径雷达(Synthetic Aperture Radar)实时成像并行计算高性能计算    
Abstract:

Synthetic Aperture Radar (SAR) imaging requires huge computation load,thus it needs high-end computation platform to construct the system when comes to real time imaging process.Typical SAR real time imaging systems adopt DSP,FPGA and cluster.This paper presents a new approach that realizes SAR real time imaging processing based on Computer Unified Device Architecture (CUDA),which is a new parallel programming model introduced recently on Graphic Processing Unit (GPU).The study had analyzed the difference between data parallel mode of CUDA and task parallel mode of typical platform,including studied RD algorithm structure and optimized each step according to CUDA parallel programming model,then the corresponding RD algorithm structure is implemented.This poper also conducted the experiment results showed the speed on this platform is about 20~30 times of a common high-end PC(Intel Core-i7 950),and 10 times of the speed required for real time imaging for RadarSat-1.It proves a promising way to realize SAR real time imaging system.

Key words: Synthetic Aperture Radar    Real time imaging    Parallel computing    High performance computing
收稿日期: 2011-01-05 出版日期: 2013-01-23
:  TP 75  
基金资助:

遥感卫星应用国家工程实验室遥感卫星数据接收系统项目(O92601101C)。

作者简介: 杨仁忠(1952-),男,北京人,研究员,主要从事信号获取与处理\,遥感数据处理研究。Email:rzyang@ceode.ac.cn。
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引用本文:

杨仁忠,张 萄,林波涛,韦宏卫. GPU平台下针对SAR地面快视系统的RD算法优化与实现[J]. 遥感技术与应用, 2012, 27(2): 237-242.

Yang Renzhong,Zhang Tao,Lin Botao,Wei Hongwei. Optimization and Implementation of RD Algorithm in SAR Ground Quick Look System According to GPU Platform. Remote Sensing Technology and Application, 2012, 27(2): 237-242.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2012.2.237        http://www.rsta.ac.cn/CN/Y2012/V27/I2/237

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