北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2002, Vol. 25 ›› Issue (3): 22-26.

• 学术论文 • 上一篇    下一篇

多率滤波器组消除混迭的一种方法

李学斌, 刘泽民   

  1. 北京邮电大学电信工程学院, 北京 100876
  • 收稿日期:2001-09-27 出版日期:2002-09-10
  • 作者简介: 李学斌(1967—),男,博士生。
  • 基金资助:
    国家“863计划”资助项目(863-317-04-11-99)

A Method to Depress Aliasing for Multirate Filter Banks

LI Xue-bin, LIU Ze-min   

  1. Telecommunication Engineering School, Beijing University of Posts andTelecommunications, Beijing 100876, China
  • Received:2001-09-27 Online:2002-09-10
  • Supported by:
     

摘要: 通过分析最大抽取均匀滤波器组中产生的混迭分量,提出了适当设定综合滤波器与分析滤波器的关系以使混叠相互抵消的方法。理论分析表明,在频率交界点可将混迭完全消除,如果相邻滤波器的频率特性对称性较好可使总混迭很小。实验证明了该方法的有效性。

关键词: 滤波器组, 混迭失真, 通用参数滤波器

Abstract: An aliasing component counteracting scheme for uniform maximally decimated filter banks by setting proper relations between analysisfilters and synthesis filtes is proposed. Theoretical analysis shows that the aliasing at interface frequencies can be canceled completely. If the frequency characters of adjacent filters is symmetrical nearly, the total aliasing may be small. Experimental results show the effectivity.

Key words: filter bank, aliasing, general parameter filter

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