| 基于ADSP-2106x的DFT改进算法 |
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| 引用本文： | 徐硕,徐习东,刘浏.基于ADSP-2106x的DFT改进算法[J].电力系统保护与控制,2006,34(19):26-28,41. |
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| 作者姓名： | 徐硕 徐习东 刘浏 |
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| 作者单位： | 浙江大学电气工程学院 浙江杭州310027(徐硕，徐习东)，浙江科技学院信息学院 浙江杭州310023(刘浏) |
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| 摘 要： | 离散傅氏算法DFT(D iscrete Fourier Transform)计算量随着采样频率的增加而增加,给实时在线频谱增加了困难。而递推算法虽然能大幅减少运算量,但会存在累计误差,影响了算法的可靠性。提出了DFT的一种改进算法,该算法采用分组求和的方式,能大幅地减少全周傅氏算法运算量,同时不会发生累积误差,最后通过基于ADSP-2106x的编程,对两种算法进行了对比分析。
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| 关 键 词： | ADSP-2106x 离散傅里叶变换 算法 继电保护 |
| 文章编号： | 1003-4897（2006）19-0026-03 |
| 收稿时间： | 2006-04-18 |
| 修稿时间： | 2006-04-182006-05-08 |
An improved DFT algorithm based on ADSP- 2106x |
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| XU Shuo ,XU Xi-dong ,LIU Liu.An improved DFT algorithm based on ADSP- 2106x[J].Power System Protection and Control,2006,34(19):26-28,41. |
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| Authors: | XU Shuo XU Xi-dong LIU Liu |
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| Affiliation: | 1. School of Electrical Engineering, Zhejiang University, Hangzhou 310027,China; 2. School of Information Engineering, Zhejiang College of Science and TEchnology, Hangzhou 310023, China |
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| Abstract: | The calculation of full-wave DFT(Discrete Fourier Transform) algorithm increases with the rising of the sampling frequency,but it is not very suitable for the real-time processing circumstance.The recursive of DFT algorithm reduce the calculation dramatically,but once storage errors occur,an accumulated error will be made which will affect the reliability of the algorithm.This paper presents a new improved algorithm of DFT which use the method of group calculation.This algorithm can reduces the calculation of non-recursive DFT obviously and increase the reliability.ADSP-2106x-based programs are proposed to compare the improved algorithm with the non-recursive algorithm. |
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| Keywords: | ADSP-2106x DFT algorithm relay protection |
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