| 平行六边形区域上的快速离散傅立叶变换 |
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| 引用本文： | 孙家昶,姚继锋.平行六边形区域上的快速离散傅立叶变换[J].计算数学,2004,26(3):351-366. |
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| 作者姓名： | 孙家昶 姚继锋 |
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| 作者单位： | 中科院软件所并行计算实验室,北京,100080 |
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| 基金项目： | 国家重点基础研究项目(G19990328)，国家基金委项目(60173021)资助 |
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| 摘 要： | In this paper, we propose a fast algorithm for computing the DGFT (Discrete Generalized Fourier Transforms) on hexagon domains 6], based on the geometric properties of the domain. Our fast algorithm (FDGFT) reduces the computation complexity of DGFT from O(N4) to O(N2 log N). In particulary, for N =2^P23^P34^P45^P56^P6, the floating point computation working amount equals to(17/2P2 16p3 135/8p4 2424/25p5 201/2P6)3N^2. Numerical examples are given to access our analysis.
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| 关 键 词： | 快速傅立叶变换 离散傅立叶变换 二维三方向 平行六边形区域 |
A FAST ALGORITHM OF DISCRETE GENERALIZED FOURIER TRANSFORMS ON HEXAGON DOMAINS |
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| Sun Jiachang Yao Jifeng.A FAST ALGORITHM OF DISCRETE GENERALIZED FOURIER TRANSFORMS ON HEXAGON DOMAINS[J].Mathematica Numerica Sinica,2004,26(3):351-366. |
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| Authors: | Sun Jiachang Yao Jifeng |
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| Institution: | Sun Jiachang Yao Jifeng (Parallel Computing Division, Institute of Software, Academica Sinica, Beijing, 100080) |
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| Abstract: | In this paper, we propose a fast algorithm for computing the DGFT (Discrete Generalized Fourier Transforms) on hexagon domains 6], based on the geometric properties of the domain. Our fast algorithm (FDGFT) reduces the computation complexity of DGFT from O(N4) to O(N2logN). In particulary, for N = 2P23P34P45P56P6, the floating point computation working amount equals to (17/2P-2 + 16p3 + 135/8P4 + 2424/25p5 + 201/2p6)3N2. Numerical examples are given to access our analysis. |
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| Keywords: | FFT DGFT on Hexagon Domain FDGFT |
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