基于开关电流技术的小波变换的设计与实现  

Design and Implementation of Wavelet Transform Based on Switched-Current Technology

作　　者：张勇[1] 王卫东[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004

出　　处：《微电子学》2011年第4期558-561,566,共5页Microelectronics

基　　金：广西科学研究与技术开发计划项目资助(0731021)

摘　　要：用开关电流技术实现小波变换的关键是实现小波滤波器,小波滤波器的传输函数可通过对小波基函数的有理逼近获得。采用高斯函数1阶导数作为基本小波,用Padé变换获得其有理分式逼近,利用开关电流技术实现小波滤波器,并得到小波变换所需的基本小波及其膨胀小波。用Cadence Spectre对该小波滤波器进行仿真,仿真结果验证了小波滤波器的良好特性。Design of wavelet filter is the key to implement wavelet transform using switched-current technology.Transfer-function of wavelet filter can be obtained with fractional approximation from mother wavelet function.In this paper,the first derivative of Gaussian function was used as basic wavelet,and its rational fraction approximation was obtained with Padé conversion.The wavelet filter was implemented based on switched-current technique.Basic wavelet and its dilation necessary for wavelet transform were also obtained.Results from simulation with Spectre of Cadence indicated that the wavelet filter had excellent performance.

关 键 词：开关电流 小波滤波器 PADÉ逼近 

分 类 号：TN432[电子电信—微电子学与固体电子学]