NDLI: Closed form variable fractional delay using FFT with transition band trade-off

Content Provider	IEEE Xplore Digital Library
Author	Soo-Chang Pei Yun-Chiu Lai
Copyright Year	2014
Description	Author affiliation: Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan (Soo-Chang Pei) \|\| Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan (Yun-Chiu Lai)
Abstract	In earlier paper, a conjugate symmetric frequency response has been presented to design the variable fractional delay filter by FFT, and has been proved to associate with the windowed sinc filter. However, this earlier method has no transition band design consideration. Therefore, in this paper, the trade-off between the transition band width and Gibbs phenomenon ripples is discussed, and an improved closed form design with additional transition band samples is introduced to reduce Gibbs phenomenon ripples. The proposed improved fractional delay method can also be efficiently realized by FFT using the tunable fractional delay parameter and transition band weighting factor. Several comparisons between the earlier method and the proposed improved method are also demonstrated. By measuring the largest peak ripple value in magnitude responses, our proposed method can achieve 9.43 times peak ripples reduction than the earlier method.
Sponsorship	IEEE Circuits Syst. Soc.
Starting Page	978
Ending Page	981
File Size	518315
Page Count	4
File Format	PDF
e-ISBN	9781479934324
DOI	10.1109/ISCAS.2014.6865301
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-01
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delays Frequency response Finite impulse response filters Passband Closed-form solutions Interpolation windowing method fractional delay filter Gibbs phenomenon
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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