DocumentCode :
799672
Title :
Efficient Implementation of 2 
Oversampled Exponentially Modulated Filter Banks
Oversampled Exponentially Modulated Filter BanksAuthor :
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
Link To Document :
