期刊文献+

基于IIR数字网络的开关电流电路小波变换方法 被引量:2

A Method for Wavelet Transform Using Switched-Current Circuits Based on IIR Digital Network Theory
下载PDF
导出
摘要 提出了一种基于无限冲激响应(IIR)数字网络结构的开关电流电路小波变换方法。结合时域直接法和非线性最小二乘法,构造高精度小波滤波器逼近函数。通过采样离散化和标准Z变换,将小波逼近函数转换成离散域传递函数。基于IIR数字网络,设计开关电流1阶节和2阶节电路模块,以此综合小波滤波器电路。以5阶高斯小波变换电路为例进行说明,理论分析和仿真结果验证了方法的有效性。 A method for wavelet transform using switched-current circuits was proposed on the base of infinite impulse response (IIR) digital network structure. The time-domain direct method was combined with the nonlinear least-square method to construct a high precision approximation function of wavelet filter. By using the discrete sampling and standard Z-transforming, the obtained approximate wavelet filter's impulse response was transformed to a Z-domain transfer function. Based on the IIR digital network structure, the first-order and second-order section circuits were designed for synthesizing the wavelet filter circuit. As an example, the fifth order Gaussian wavelet base circuit was designed to illustrate the proposed method. Theoretical analysis and simulation results showed that the proposed scheme was effective.
出处 《微电子学》 CAS CSCD 北大核心 2016年第3期369-374,378,共7页 Microelectronics
基金 国家杰出青年科学基金资助项目(50925727) 国家自然科学基金资助项目(61201108) 湖南省科技计划项目(2013GK3096) 湖南理工学院科研项目(2012Y27)
关键词 开关电流电路 小波变换 小波滤波器 滤波器逼近 IIR数字网络 Switched-current circuits Wavelet transform Wavelet filter Filter approximation IIR digitalnetwork
  • 相关文献

参考文献12

  • 1LIN J, KI W H, EDWARDS T, et al. Analog VLSI implementations of auditory wavelet transforms using switched-capacitor circuits [J]. IEEE Trans Circ Syst I: Fundam Theo & Applic, 1994, 41(9): 572-583.
  • 2KAREL J M H, HADDAD S A P, HISENI S, et al. Implementing wavelets in continuous-time analog circuits with dynamic range optimization [J]. IEEE Trans Circ Syst I: Regu Pap, 2012, 59(2): 229-242.
  • 3胡沁春,何怡刚,郭迪新,李宏民.基于开关电流技术的小波变换的滤波器电路实现[J].物理学报,2006,55(2):641-647. 被引量:11
  • 4张勇,王卫东.基于开关电流技术的小波变换的设计与实现[J].微电子学,2011,41(4):558-561. 被引量:1
  • 5ZHAO W, SUN Y, HE Y. Minimum component high frequency Gm-C wavelet filters based on Maclaurin series and multiple loop feedback [J]. Elec Lett, 2010, 46(1): 34-35.
  • 6LI H M, HE Y G, SUN Y C. Detection of cardiac signal characteristic point using log-domain wavelet transform circuits [J]. Circ Syst & Signal Process, 2008, 27(5): 683-698.
  • 7ZHAO W, HE Y. Realization of wavelet transform using switched-current filters [J]. Analog Integr Circ Signal Process, 2012, 71(3): 571-581.
  • 8LI M, HE Y, LONG Y. Analog VLSI implementation of wavelet transform using switched-current circuits[J]. Analog Integr Circ & Signal Process, 2012, 71 (2) : 283-291.
  • 9李目,何怡刚.基于改进差分进化算法的连续小波变换电路[J].微电子学,2012,42(4):497-501.
  • 10HUGHES J B, MACBETH I C, PATTULLO D M. Second generation switched-current signal processing[C] //IEEE Int Symp Circ b- Syst. New Orleans, LA, USA. 1990, (4): 2805-2808.

二级参考文献10

共引文献10

同被引文献12

引证文献2

二级引证文献9

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部