| 一种基于数字信号处理技术的改进通用色散介质移位算子时域有限差分方法 |
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| 引用本文： | 张玉强,葛德彪.一种基于数字信号处理技术的改进通用色散介质移位算子时域有限差分方法[J].物理学报,2009,58(12):8243-8248. |
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| 作者姓名： | 张玉强 葛德彪 |
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| 作者单位： | (1)西安电子科技大学物理系,西安 710071; (2)西安电子科技大学物理系,西安 710071；延安大学物理与电子信息学院，延安 716000 |
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| 基金项目： | 国家自然科学基金（批准号： 60871071）资助课题. |
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| 摘 要： | 借鉴数字信号处理技术中的无限脉冲响应滤波器实现的思想，提出一种适用于通用色散介质的改进移位算子时域有限差分（shift operator finite-difference time-domain，SO-FDTD）方法.与原SO-FDTD方法相比，改进的SO-FDTD方法内存占用减少33%以上，同时计算时间也有所减少.最后通过一阶、二阶色散介质雷达散射截面计算验证了方法的通用性和有效性.
关键词：
时域有限差分
色散介质
移位算子
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| 关 键 词： | 时域有限差分 色散介质 移位算子 |
| 收稿时间： | 2008-01-13 |
An improved shift operator finite-difference time-domain method based on digital signal processing technique for general dispersive medium |
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| Zhang Yu-Qiang,Ge De-Biao.An improved shift operator finite-difference time-domain method based on digital signal processing technique for general dispersive medium[J].Acta Physica Sinica,2009,58(12):8243-8248. |
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| Authors: | Zhang Yu-Qiang Ge De-Biao |
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| Abstract: | An improved shift operator finite-difference time-domain (SO-FDTD) method for general dispersive medium based on the implementation of infinite impulse response filter in digital signal processing technique is presented. Compared with the commonly used SO-FDTD,the storage variables in the improved SO-FDTD are reduced by 33% and computational efficiency is also increased. Finally,the generality and the feasibility of the presented scheme are validated by calculations of scattering by first order and second order dispersive objects. |
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| Keywords: | finite-difference time-domain dispersive media shift operator |
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