Analysis and Properties of Time-Varying Modified DFT Filter Banks

被引：0

作者：

Wang, Guangyu ^{[1
]}

Zhang, Zufan ^{[1
]}

Chen, Qianbin ^{[1
]}

机构：

[1] Chongqing Univ Posts & Telecommun CQUPT, Chongqing Key Lab Mobile Commun, Chongqing 400065, Peoples R China

来源：

EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING | 2010年

基金：

中国国家自然科学基金;

关键词：

POLYPHASE;

D O I：

10.1155/2010/342865

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：

We provide a comprehensive analysis of the time-varying modified DFT (MDFT) filter bank based on the general time-varying filter bank theories (Wang, 2005, 2006, 2008, 2009) in both the time domain and frequency domain. We give firstly the description of the time-invariant MDFT filter bank including its perfect reconstruction (PR) condition, its mechanism of aliasing error cancellation and the relationship with the cosine-modulated filter bank in detail. Then, the time-varying MDFT filter bank is analyzed according to the time-domain description. Finally, the window switching method is introduced to design the prototype filter in the time-varying MDFT filter bank with examples. The error analysis shows that the introduced design approach is useful in practice.

引用

页数：15

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