摘要
提出了一种几乎完全重构的过采样DFT调制滤波器组的设计方法。分析和综合滤波器组采用了不同的原型滤波器,使得设计自由度大为增加。考虑滤波器组的子带混叠、输出混叠、系统失真要求,推导并给出了相应的设计算法。实验结果证明提出的方法在相同滤波器长度情况下可以得到更好的阻带衰减。
This paper presents a new method for the design of oversampled nearly perfect reconstruction （NPR） DFT modulated filter banks.Due to usage of the different analysis and synthesis prototype filters, there exists more available degrees of freedom for optimal design. In terms of the requirements on the passband, stopband, and system distortion of the filter bank, the corresponding design formula is derived.The proposed method can achieve better performance than the traditional method using a prototype filter, which is also verified by the numerical examples.
出处
《电子科技》
2006年第9期10-13,共4页
Electronic Science and Technology
关键词
过采样
DFT调制滤波器组
几乎完全重构
Oversampled filter bank
DFT modulated filter bank
near perfect reconstruction.
作者简介
林英（1982-），女，硕士研究生。研充方向：小波及其在信号处理中的应用。
