基于冗余计算约简的环扫SAR回波多GPU快速模拟
环扫SAR作为一种特殊工作模式雷达，在对地观测方面有着广泛应用。随着分辨率提高及测绘带宽增大，对环扫SAR成像精度提出了更高的要求。而快速的海量回波模拟方法能够对高精度成像算法设计、研究提供有力的支撑。本文给出一种基于多GPU（Graphics Processing Unit，图形处理器）的环扫SARN波模拟方法，并在此基础上进行冗余计算优化，通过MPI（Message Passing Interface，消息传递接口）在多GPU上进行了实现，实验结果表明在使用4块GPU的条件下，经过冗余计算约简，并行效率提高2倍以上，硬件成本降低50％，相对传统CPU串行仿真提高350倍左右。...
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| Published in | 雷达学报 Vol. 5; no. 4; pp. 434 - 443 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
北京化工大学信息科学与技术学院北京 100029%北京遥感设备研究所北京 100854
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 2095-283X |
| DOI | 10.12000/JR15078 |
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| Abstract | 环扫SAR作为一种特殊工作模式雷达，在对地观测方面有着广泛应用。随着分辨率提高及测绘带宽增大，对环扫SAR成像精度提出了更高的要求。而快速的海量回波模拟方法能够对高精度成像算法设计、研究提供有力的支撑。本文给出一种基于多GPU（Graphics Processing Unit，图形处理器）的环扫SARN波模拟方法，并在此基础上进行冗余计算优化，通过MPI（Message Passing Interface，消息传递接口）在多GPU上进行了实现，实验结果表明在使用4块GPU的条件下，经过冗余计算约简，并行效率提高2倍以上，硬件成本降低50％，相对传统CPU串行仿真提高350倍左右。 |
|---|---|
| AbstractList | 环扫SAR作为一种特殊工作模式雷达，在对地观测方面有着广泛应用。随着分辨率提高及测绘带宽增大，对环扫SAR成像精度提出了更高的要求。而快速的海量回波模拟方法能够对高精度成像算法设计、研究提供有力的支撑。本文给出一种基于多GPU（Graphics Processing Unit，图形处理器）的环扫SARN波模拟方法，并在此基础上进行冗余计算优化，通过MPI（Message Passing Interface，消息传递接口）在多GPU上进行了实现，实验结果表明在使用4块GPU的条件下，经过冗余计算约简，并行效率提高2倍以上，硬件成本降低50％，相对传统CPU串行仿真提高350倍左右。 TN95; 环扫SAR作为一种特殊工作模式雷达，在对地观测方面有着广泛应用。随着分辨率提高及测绘带宽增大，对环扫SAR成像精度提出了更高的要求。而快速的海量回波模拟方法能够对高精度成像算法设计、研究提供有力的支撑。本文给出一种基于多GPU(Graphics Processing Unit，图形处理器)的环扫SAR回波模拟方法，并在此基础上进行冗余计算优化，通过MPI(Message Passing Interface，消息传递接口)在多GPU上进行了实现，实验结果表明在使用4块GPU的条件下，经过冗余计算约简，并行效率提高2倍以上，硬件成本降低50%，相对传统CPU串行仿真提高350倍左右。 |
| Abstract_FL | As a special working mode, the circular scanning Synthetic Aperture Radar (SAR) is widely used in the earth observation. With the increase of resolution and swath width, the simulation data has a massive increase, which boosts the new requirements of efficiency. Through analyzing the redundancy in the raw data simulation based on Graphics Processing Unit (GPU), a fast simulation method considering reduction of redundant computation is realized by the multi-GPUs and Message Passing Interface (MPI). The results show that the efficiency of 4-GPUs increases 2 times through the redundant reduction, and the hardware cost decreases by 50%, thus the overall speedup achieves 350 times than the traditional CPU simulation. |
| Author | 胡辰 张帆 李国君 李伟 崔忠马 |
| AuthorAffiliation | 北京化工大学信息科学与技术学院,北京100029 北京遥感设备研究所,北京100854 |
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| Author_FL | Zhang Fan Hu Chen Li Guojun Cui Zhongma Li Wei |
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| DOI | 10.12000/JR15078 |
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| DocumentTitleAlternate | Computation Reduction Oriented Circular Scanning SAR Raw Data Simulation on Multi-GPUs |
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| EndPage | 443 |
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| Keywords | 回波模拟 Computing optimization GPU parallel Raw data simulation 计算优化 Circular scanning SAR 环扫SAR GPU并行 |
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| Notes | As a special working mode, the circular scanning Synthetic Aperture Radar （SAR） is widely used in the earth observation. With the increase of resolution and swath width, the simulation data has a massive increase, which boosts the new requirements of efficiency. Through analyzing the redundancy in the raw data simulation based on Graphics Processing Unit （GPU）, a fast simulation method considering reduction of redundant computation is realized by the multi-GPUs and Message Passing Interface （MPI）. The results show that the efficiency of 4-GPUs increases 2 times through the redundant reduction, and the hardware cost decreases by 50%, thus the overall speedup achieves 350 times than the traditional CPU simulation. Circular scanning SAR; Raw data simulation; GPU parallel; Computing optimization 10-1030/TN Hu Chen1 Zhang Fan1 Li Guojun1 Li Wei1 Cui Zhongma2.1（ College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China; 2 Beijing Remote Sensing Equipment Research I |
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| Snippet | 环扫SAR作为一种特殊工作模式雷达，在对地观测方面有着广泛应用。随着分辨率提高及测绘带宽增大，对环扫SAR成像精度提出了更高的要求。而快速的海量回波模拟方法能够对高精... TN95; 环扫SAR作为一种特殊工作模式雷达，在对地观测方面有着广泛应用。随着分辨率提高及测绘带宽增大，对环扫SAR成像精度提出了更高的要求。而快速的海量回波模拟方法能够... |
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| SubjectTerms | GPU并行 回波模拟 环扫SAR 计算优化 |
| Title | 基于冗余计算约简的环扫SAR回波多GPU快速模拟 |
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