Realization of wavelet transform using switched-current filters

被引：18
作者：
Zhao, Wenshan [1 ,2 ]
He, Yigang [2 ]
机构：
[1] Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing 100044, Peoples R China
[2] Hunan Univ, Coll Elect & Informat Engn, Changsha 410082, Hunan, Peoples R China
来源：
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING | 2012年 / 71卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Wavelet transform; Switched-current filter; Network function approximation; Multiple-loop feedback; Bilinear transform; IMPLEMENTATION;
D O I：
10.1007/s10470-011-9743-1
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A method for realizing wavelet transform (WT) is presented, in which the WT is synthesized by a bank of switched-current (SI) filters whose impulse responses are the basic wavelet function and its dilations. SI circuits are well suitable for this application since the dilation constant across different scales of the transform can be precisely implemented and controlled by the sampling frequency. In this article, the wavelet base is approximated by a systematic algorithm with all the involved approximation parameters taken into account. Also, the SI filter employing the follow-the-leader feedback (FLF) multiple-loop feedback (MLF) structure is proposed to synthesize the approximation function. The Gaussian wavelet is selected as an example to illustrate the design procedure. Simulation results indicate that the proposed method has the merits of high approximation accuracy, strong stability and low sensitivity.
引用
收藏
页码：571 / 581
页数：11
相关论文
共 24 条
[1]  
Adiga A., 2003, P IEEE ICASSP, V6, P6
[2]  
[Anonymous], 2001, A Wavelet Tour of Signal Processing
[3]  
[Anonymous], 1987, State Space Modeling of Time Series
[4]   An analogue bandpass filter realisation of the Continuous Wavelet Transform [J].
Casson, Alexander J. ;
Yates, David C. ;
Patel, Shyam ;
Rodriguez-Villegas, Esther .
2007 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-16, 2007, :1850-1854
[5]  
David F., 1977, CIRCUITS
[6]  
de Queiroz A.C.M., 1991, IEEE INT S CIRCUITS, V3, P1801
[7]  
Deliyannis T., 1999, ELEC ENG SY, DOI 10.1201/9781439821879
[8]  
Edwards RT, 1996, ISCAS 96: 1996 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS - CIRCUITS AND SYSTEMS CONNECTING THE WORLD, VOL 4, P368, DOI 10.1109/ISCAS.1996.541978
[9]   Log-domain wavelet bases [J].
Haddad, SAP ;
Bagga, S ;
Serdijn, WA .
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2005, 52 (10) :2023-2032
[10]  
Haddad SAP, 2003, PROCEEDINGS OF THE 2003 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL I, P121
123