摘要
为满足信息处理的低电压、低功耗及实时处理等应用的要求,提出了基于开关电流技术的Morlet小波变换的模拟实现方法.高斯函数发生器的开关电流电路实现是Mor-let小波变换模拟实现的关键,经过Pade逼近可以得到高斯函数的有理分式逼近,从而可用开关电流一阶节、二阶节的级联实现高斯函数发生器.仿真结果表明了该方法的可行性.
In order to meet the application requirement in signal processing for low-voltage, low-power and real-time, a method for the analog implementation of Morlet wavelet transform (WT), based on switched current (SI) circuits, was proposed. Gaussian function generators play a key role in the analog hardware implementation of Morlet WT. The rational form of Gaussian function can be given with Pade approximation so that Gaussian function generator can be conveniently implemented with the cascade of SI first order section and second order section. Simulation results have shown that the method is feasible.
出处
《湖南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2009年第2期58-61,共4页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50677014
60876022)
高校博士点基金资助项目(20060532002)
国家863计划资助项目(2006AA04A104)
湖南省自然科学基金资助项目(06JJ2024)
关键词
小波变换
开关电流
PADE逼近
高斯函数
wavelet transform
switched current
pade approximation
Gaussian functions