Polyphase Decomposition of Digital Fractional-Delay Filters

被引：12
|
作者：
Johansson, HaKan [1 ]
Harris, Fred [2 ]
机构：
[1] Linkoping Univ, Dept Elect Engn, Div Commun Syst, S-58183 Linkoping, Sweden
[2] San Diego State Univ, Dept Elect & Comp Engn, San Diego, CA 92182 USA
来源：
IEEE SIGNAL PROCESSING LETTERS | 2015年 / 22卷 / 08期
关键词：
FIR filters; fractional-delay filters; high-order filters; polyphase decomposition; BAND-LIMITED SIGNALS; PHASE FIR FILTERS; FARROW STRUCTURE; EFFICIENT STRUCTURE; DESIGN; RECONSTRUCTION; INTERPOLATION; DECIMATION;
D O I：
10.1109/LSP.2014.2381603
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This letter shows that, for arbitrary M-fold polyphase decompositions, the polyphase components of digital fractional-delay (FD) filters correspond to FD filters as well, but with different delays and gains. For even values of, the components also have additional and different phase offsets. The letter also discusses the application of these results to the optimization of high-order filters with few unknowns.
引用
收藏
页码：1021 / 1025
页数：5
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