DocumentCode
799672
Title
Efficient Implementation of 2 
Oversampled Exponentially Modulated Filter Banks
Author
Viholainen, Ari ; Alhava, Juuso ; Renfors, Markku
Author_Institution
Inst. of Commun. Eng., Tampere Univ. of Technol.
Volume
53
Issue
10
fYear
2006
Firstpage
1138
Lastpage
1142
Abstract
This paper studies 2times oversampled exponentially modulated filter banks because they can be a useful solution for various communications signal processing problems. At first, the perfect reconstruction (PR) property of this kind of 2M-channel complex modulated filter bank is proven by using the results of M-channel PR cosine-/sine-modulated filter banks (CMFBs/SMFBs). Then, two efficient implementation structures are developed. The computational complexities of CMFB/SMFB-based and discrete Fourier transform (DFT)-based realizations are practically the same when comparing the required number of multiplications and additions. However, the DFT-based structures can be further simplified by using an intuitive spectral interpretation. This results in the modified filter bank part that requires less arithmetic operations than the original one
Keywords
channel bank filters; computational complexity; discrete Fourier transforms; sampled data filters; signal reconstruction; spectral analysis; 2M-channel complex modulated filter bank; computational complexities; discrete Fourier transform; exponentially modulated filter banks; oversampled filter banks; perfect reconstruction property; Arithmetic; Channel bank filters; Computational complexity; Discrete Fourier transforms; Filter bank; Finite impulse response filter; Frequency; Prototypes; Signal processing; Signal synthesis; 2; Efficient implementation; modulated filter bank; perfect reconstruction (PR);
fLanguage
English
Journal_Title
Circuits and Systems II: Express Briefs, IEEE Transactions on
Publisher
ieee
ISSN
1549-7747
Type
jour
DOI
10.1109/TCSII.2006.882351
Filename
1715593
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