北京航空航天大学学报 ›› 2005, Vol. 31 ›› Issue (11): 1217-1221.

• 论文 • 上一篇    下一篇

基于功率互补对的树形结构混合滤波器组

刘治宇, 林茂六   

  1. 哈尔滨工业大学 电子与通信工程系,哈尔滨150001
  • 收稿日期:2004-07-18 出版日期:2005-11-30 发布日期:2010-09-20
  • 作者简介:刘治宇(1978-),男,辽宁沈阳人,博士生, dsom@163.com
  • 基金资助:

    国家自然科学基金资助项目(60372051)

Tree structured hybrid filter banks based on power complementary pairs

Liu Zhiyu, Lin Maoliu   

  1. Department of Electronics and Communication Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:2004-07-18 Online:2005-11-30 Published:2010-09-20

摘要: 提出了一种近似完全重构的树形结构混合滤波器组(HFB)的设计方法,利用基于功率互补对的树形结构的模拟分解滤波器,而非传统的低通、带通和高通分解滤波器均匀分割整个系统带宽.采用遗传算法实现了功率互补对的优化设计,并基于逆快速傅立叶变换(IFFT)实现了数字综合滤波器的设计以保证近似完全重构.3阶和5阶的功率互补对与63阶的数字FIR(有限冲击响应)综合滤波器所组成的四通道混合滤波器组,具有1.06×10-7dB平均失真误差和-111?dB的平均混叠误差,满足15?bit的模数转换(ADC)系统要求.

Abstract: A near-perfect reconstruction tree-structured hybrid filter bank (HFB) was presented. The analog analysis filters to analyze input signals are not the low-pass, band-pass or high-pass filters designed by using conventional methods, but the tree-structured analog filters based on power complementary pairs,whose parameters were optimized by genetic algorithm. And the digital synthesis filters were implemented by means of the optimization method based on inverse fast Fourier transforms. 3rd-order and 5th-order analog power complementary filter pairs were designed for 4-channel tree-structure HFB. And length 63 FIR(finite impulse respouse) synthesis filters were implemented to ensure the near-perfect reconstruction. The HFB, which yields 1.06×10-7dB average deviation from 0dB distortion and -111dB average aliasing, is suitable for systems up to 15 bits resolution.

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发