| 短时离散Walsh变换的快速算法 |
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| 引用本文： | 潘逢治,张立明.短时离散Walsh变换的快速算法[J].复旦学报(自然科学版),2002,41(2):230-234. |
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| 作者姓名： | 潘逢治 张立明 |
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| 作者单位： | 复旦大学电子工程系,上海,200433 |
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| 基金项目： | 国家自然科学基金资助项目 (39870 194 ) |
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| 摘 要： | 在对传统快速离散Walsh变换算法（FWT）进行分析的基础上，充分考虑实时信号和提取局部特征等应用场合的特点，结合FWT算法的性质，提出了短时离散Walsh变换（STDWT）的概念及其快速算法，使加减运算次数进一步减到最少。与传统FWT相比，速度有了明显的提高。最后给出了该算法与传统算法比较的实验数据。
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| 关 键 词： | 短时离散 Walsh变换 快速算法 信号序列 |
| 文章编号： | 0427-7104(2002)02-0230-05 |
A Fast Short Time Discrete Walsh Transform Algorithm |
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| PAN Feng zhi,ZHANG Li ming.A Fast Short Time Discrete Walsh Transform Algorithm[J].Journal of Fudan University(Natural Science),2002,41(2):230-234. |
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| Authors: | PAN Feng zhi ZHANG Li ming |
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| Abstract: | Short time discrete Walsh transform(STDWT)and its fast algorithm are proposed in this paper based on the analysis of traditional fast DWT algorithm (FWT).It takes characteristic of the FWT into account to minimize the total numbers of plus minus operations,and is suitable for the applications of real time signals processing or local features attraction.The experimental data is presented and compared with those of the traditional algorithms. |
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| Keywords: | discrete Walsh transform(DWT) fast discrete Walsh transform(FWT) short time discrete Walsh transform(STDWT) |
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