A new variable digital filter design based on fractional delay

S. J. Darak; A. P. Vinod; E. M.K. Lai

doi:10.1109/ICASSP.2011.5946810

A new variable digital filter design based on fractional delay

S. J. Darak^*, A. P. Vinod, E. M.K. Lai

^*Corresponding author for this work

Research output: Chapter in Book/Conference Proceeding/Report › Conference Paper published in a book › peer-review

9 Citations (Scopus)

Abstract

This paper presents a new method for the design of finite impulse response (FIR) filter that provides variable frequency responses. The proposed idea is to replace each unit delay operator in a fixed-coefficient FIR filter with the 2^nd order FIR fractional delay (FD) structure and the cutoff frequency, f_c of the filter is changed by changing the FD value. The change in FD results in change in amplitude and length of an impulse response. This in turn changes f_c and transition bandwidth (TBW) of an FIR filter. The mathematical relation between cut-off frequency, TBW and FD value D is derived. The design example shows that the proposed method provides very fine control over f_c.

Original language	English
Title of host publication	2011 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 - Proceedings
Pages	1629-1632
Number of pages	4
DOIs	https://doi.org/10.1109/ICASSP.2011.5946810
Publication status	Published - 2011
Externally published	Yes
Event	36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 - Prague, Czech Republic Duration: 22 May 2011 → 27 May 2011

Publication series

Name	ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
ISSN (Print)	1520-6149

Conference

Conference	36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011
Country/Territory	Czech Republic
City	Prague
Period	22/05/11 → 27/05/11

Keywords

Farrow structure
Finite impulse response filter
Variable digital filter

Access to Document

10.1109/ICASSP.2011.5946810

Cite this

Darak, S. J., Vinod, A. P., & Lai, E. M. K. (2011). A new variable digital filter design based on fractional delay. In 2011 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 - Proceedings (pp. 1629-1632). Article 5946810 (ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings). https://doi.org/10.1109/ICASSP.2011.5946810

@inproceedings{c02c7b54b0f44a0ea09da229bd25df6d,

title = "A new variable digital filter design based on fractional delay",

abstract = "This paper presents a new method for the design of finite impulse response (FIR) filter that provides variable frequency responses. The proposed idea is to replace each unit delay operator in a fixed-coefficient FIR filter with the 2nd order FIR fractional delay (FD) structure and the cutoff frequency, fc of the filter is changed by changing the FD value. The change in FD results in change in amplitude and length of an impulse response. This in turn changes fc and transition bandwidth (TBW) of an FIR filter. The mathematical relation between cut-off frequency, TBW and FD value D is derived. The design example shows that the proposed method provides very fine control over fc.",

keywords = "Farrow structure, Finite impulse response filter, Variable digital filter",

author = "Darak, \{S. J.\} and Vinod, \{A. P.\} and Lai, \{E. M.K.\}",

year = "2011",

doi = "10.1109/ICASSP.2011.5946810",

language = "English",

isbn = "9781457705397",

series = "ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings",

pages = "1629--1632",

booktitle = "2011 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 - Proceedings",

note = "36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 ; Conference date: 22-05-2011 Through 27-05-2011",

}

Darak, SJ, Vinod, AP & Lai, EMK 2011, A new variable digital filter design based on fractional delay. in 2011 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 - Proceedings., 5946810, ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, pp. 1629-1632, 36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011, Prague, Czech Republic, 22/05/11. https://doi.org/10.1109/ICASSP.2011.5946810

A new variable digital filter design based on fractional delay. / Darak, S. J.; Vinod, A. P.; Lai, E. M.K.
2011 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 - Proceedings. 2011. p. 1629-1632 5946810 (ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings).

Research output: Chapter in Book/Conference Proceeding/Report › Conference Paper published in a book › peer-review

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AU - Vinod, A. P.

AU - Lai, E. M.K.

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N2 - This paper presents a new method for the design of finite impulse response (FIR) filter that provides variable frequency responses. The proposed idea is to replace each unit delay operator in a fixed-coefficient FIR filter with the 2nd order FIR fractional delay (FD) structure and the cutoff frequency, fc of the filter is changed by changing the FD value. The change in FD results in change in amplitude and length of an impulse response. This in turn changes fc and transition bandwidth (TBW) of an FIR filter. The mathematical relation between cut-off frequency, TBW and FD value D is derived. The design example shows that the proposed method provides very fine control over fc.

AB - This paper presents a new method for the design of finite impulse response (FIR) filter that provides variable frequency responses. The proposed idea is to replace each unit delay operator in a fixed-coefficient FIR filter with the 2nd order FIR fractional delay (FD) structure and the cutoff frequency, fc of the filter is changed by changing the FD value. The change in FD results in change in amplitude and length of an impulse response. This in turn changes fc and transition bandwidth (TBW) of an FIR filter. The mathematical relation between cut-off frequency, TBW and FD value D is derived. The design example shows that the proposed method provides very fine control over fc.

KW - Farrow structure

KW - Finite impulse response filter

KW - Variable digital filter

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DO - 10.1109/ICASSP.2011.5946810

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T2 - 36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011

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ER -

A new variable digital filter design based on fractional delay

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