DocumentCode :
1854507
Title :
A realization of FIR filters with simultaneously variable bandwidth and fractional delay
Author :
Johansson, Håkan ; Eghbali, Amir
Author_Institution :
Dept. of Electr. Eng., Linkoping Univ., Linkoping, Sweden
fYear :
2012
fDate :
27-31 Aug. 2012
Firstpage :
2178
Lastpage :
2182
Abstract :
This paper introduces a realization of finite-length impulse response (FIR) filters with simultaneously variable bandwidth and fractional delay (FD). The realization makes use of impulse responses which are two-dimensional polynomials in the bandwidth and FD parameters. Unlike previous polynomial-based realizations, it utilizes the fact that a variable FD filter is typically much less complex than a variable-bandwidth filter. By separating the corresponding subfilters in the overall realization, significant savings are thereby achieved. A design example, included in the paper, shows about 65 percent multiplication and addition savings compared to the previous polynomial-based realizations. Moreover, compared to a recently introduced alternative fast filter bank approach, the proposed method offers significantly smaller group delays and group delay errors.
Keywords :
FIR filters; channel bank filters; polynomials; 2D polynomials; FIR filters; filter bank; finite length impulse response filters; fractional delay; group delay errors; polynomial based realization; variable bandwidth filter; Bandwidth; Complexity theory; Delay; Finite impulse response filter; Noise measurement; Optimization; Passband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Conference (EUSIPCO), 2012 Proceedings of the 20th European
Conference_Location :
Bucharest
ISSN :
2219-5491
Print_ISBN :
978-1-4673-1068-0
Type :
conf
Filename :
6334171
Link To Document :
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