计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (26): 87-91.

• 产品、研发、测试 • 上一篇    下一篇

过采样NPR DFT调制滤波器组设计

刘霁锋1,王小龙2   

  1. 1.西安电子科技大学 理学院 数学系,西安 710071
    2.西安电子科技大学 雷达信号处理国家重点实验室,西安 710071
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-09-11 发布日期:2007-09-11
  • 通讯作者: 刘霁锋

Design of oversampled NPR DFT modulated filter bank

LIU Ji-feng1,WANG Xiao-long2   

  1. 1.Department of Mathematics,Science School,Xidian University,Xi’an 710071,China
    2.Key Lab. for Radar Signal Processing,Xidian University,Xi’an,710071,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-09-11 Published:2007-09-11
  • Contact: LIU Ji-feng

摘要: 提出了一种具有不同分析和综合原型滤波器的过采样几乎完全重构(NPR)DFT调制滤波器组的更为简单的设计方法。按照滤波器组的通带、阻带、系统失真要求,以系统整体失真误差作为目标函数,分析和综合原型滤波器的阻带能量作为约束条件,同时引入了更简单的通带平坦性约束。与目前的设计方法相比,该方法可以得到性能更好的滤波器组,仿真的结果也证实了这点。

关键词: 过采样, DFT调制滤波器组, 几乎完全重构

Abstract: A new simpler method for the design of oversampled Nearly Perfect Reconstruction(NPR) DFT modulated filter banks with different analysis and synthesis prototype filters is presented.In terms of the requirements on the passband,stopband,and system distortion of the filter bank,the design method involves the minimization of the system distortion while constraining the stopband energy of the analysis and synthesis prototype filters.The simpler constraint about passband flatness is introduced at the same time.The proposed method can generate filters with significantly better performance than filters obtained using current design methods,which is also verified by the numerical examples.

Key words: oversampled, DFT modulated filter bank, nearly perfect reconstruction