DocumentCode :
616274
Title :
A high-resolution wideband digital channelizer for software radio systems using high-order perfect reconstruction filterbanks
Author :
Bo Li ; Jian Yan ; Xiang Chen ; Shunliang Mei
Author_Institution :
Department of Electronic Engineering, Tsinghua University, Beijing, China
fYear :
2013
fDate :
7-10 April 2013
Firstpage :
2908
Lastpage :
2913
Abstract :
High-resolution wideband digital channelizer is the key component for extraction and reconstruction of multichannel signals in software radio systems. It has been proved that complex-exponential modulated (CEM) perfect reconstruction (PR) filter-bank is an efficient structure for the wideband channelizer, in which the Parks-McClellan (PM) algorithm based design method for the PR prototype filter and PR filterbank is effective when the number of sub-channels is less than 1024. However, due to the limitation of the PM algorithm for the filters with extremely high-order or narrow transition band, it doesn´t work well when the number of sub-channels increases further. In this paper, we propose an efficient design method for such high-order PR filterbanks, which is based on the classical Frequency Sampling (FS) method and the criterion of least mean square error (LMSE). By this proposal, the designs for any high-order PR filters and related high-resolution wideband channelizers can be guaranteed with excellent reconstruction performance. Some numerical simulations are provided to verify the effectiveness of the proposed method, even when the number of sub-channels reaches to 8192.
Keywords :
frequency sampling; least mean square error; perfect reconstruction; two-channel lossless lattice; wideband digital channelizer;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2013 IEEE
Conference_Location :
Shanghai, Shanghai, China
ISSN :
1525-3511
Print_ISBN :
978-1-4673-5938-2
Electronic_ISBN :
1525-3511
Type :
conf
DOI :
10.1109/WCNC.2013.6555023
Filename :
6555023
Link To Document :
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