| 基于GPU的并行FDTD方法在二维粗糙面散射中的应用 |
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| 引用本文： | 贾春刚,郭立新,刘伟.基于GPU的并行FDTD方法在二维粗糙面散射中的应用[J].电波科学学报,2016,31(4):683-687. |
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| 作者姓名： | 贾春刚 郭立新 刘伟 |
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| 作者单位： | 1.西安电子科技大学物理与光电工程学院, 西安 710071 |
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| 基金项目： | 国家杰出青年科学基金(61225002)，航空科学基金与航空电子系统射频综合仿真航空科技重点实验室联合资助(20132081015) |
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| 摘 要： | 利用显卡(Graphics Processing Unit, GPU)加速时域有限差分(Finite-Difference Time Domain, FDTD)法计算二维粗糙面的双站散射系数, 介绍了FDTD的理论公式以及计算模型.采用各向异性完全匹配层(Uniaxial Perfectly Matched Layer, UPML)截断FDTD计算区域.重点讨论了基于GPU的并行FDTD计算粗糙面双站散射系数的并行设计方案计算流程.在NVIDIA GeForce GTX 570显卡上获得了50.7×的加速比.结果表明:通过对FDTD计算粗糙面散射问题的加速, 极大地提高了计算效率.
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| 关 键 词： | 时域有限差分法 GPU 并行 粗糙面散射 |
| 收稿时间： | 2015-11-18 |
GPU-based FDTD method for analysis of electromagnetic scattering from a 2D rough surface |
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| Affiliation: | 1.School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China2.State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China |
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| Abstract: | In this paper, graphics processing unit (GPU)-accelerated finite-difference time domain (FDTD) is developed to expedite the calculation of bistatic scattering coefficient of a two dimensional (2D) rough surface. The formulae and computation model are introduced, respectively. The FDTD lattices are truncated by a uniaxial perfectly matched layer (UPML). The implement of GPU-based FDTD for calculation of electromagnetic scattering from a 2D rough surface is discussed in detail, and the calculation process is also given. Finally, speedup of 50.7×is obtained on NVIDIA GeForce GTX 570 GPU after optimization. The proposed parallel FDTD algorithm improves the computational efficiency greatly. |
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| Keywords: | FDTD GPU parallel rough surface scattering |
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