DocumentCode
84152
Title
Comments on “Closed Form Variable Fractional Time Delay Using FFT”
Author
Blok, M.
Author_Institution
Fac. of Electron., Telecommun. & Inf., Gdansk Univ. of Technol., Gdansk, Poland
Volume
20
Issue
8
fYear
2013
fDate
Aug. 2013
Firstpage
747
Lastpage
750
Abstract
In this letter drawbacks of the aforementioned paper are pointed out. The proposed approach is improved with minor modifications of the discrete frequency response. This allows for design of fractional delay filters which are close to optimal and can be efficiently implemented in the frequency domain using the sliding DFT based structure. Alternatively, the derived equivalent closed form formulae for offset windows can be used to design filters in the time domain.
Keywords
delay filters; delays; fast Fourier transforms; frequency response; frequency-domain analysis; time-domain analysis; FFT; closed-form variable fractional time delay; discrete frequency response; filter design; fractional delay filters; frequency domain; offset windows; sliding DFT-based structure; time domain; Computational efficiency; Delays; Discrete Fourier transforms; Frequency response; Frequency-domain analysis; Interpolation; Kernel; Fractional delay (FD) filter; window method;
fLanguage
English
Journal_Title
Signal Processing Letters, IEEE
Publisher
ieee
ISSN
1070-9908
Type
jour
DOI
10.1109/LSP.2013.2265394
Filename
6522469
Link To Document