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 |
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| 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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| Summary: | 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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| Bibliography: | 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 |
| ISSN: | 2095-283X |
| DOI: | 10.12000/JR15078 |