Title :
Closed-form design of maximally flat FIR fractional delay filters
Author :
Pei, Soo-Chang ; Wang, Peng-Hua ; Lin, Huei-Shan
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei
fDate :
7/1/2006 12:00:00 AM
Abstract :
Eight types of maximally flat finite impulse response (FIR) fractional delay filters are proposed. They are designed by separately approximating the real part and the imaginary part of the frequency response. Among these eight types of filters, two of them are equivalent to the existing design results in the open literature. Therefore, a more general closed-form design of the maximally flat FIR fractional delay filters is described in this letter, and some design examples of FIR fractional delay filters will be illustrated
Keywords :
FIR filters; approximation theory; delay filters; frequency response; FIR; approximation; closed-form design; finite impulse response filter; fractional delay filter; frequency response; Closed-form solution; Delay; Digital filters; Equations; Filtering theory; Finite impulse response filter; Frequency response; Interpolation; Transfer functions; Cosine series expansion; fractional delay (FD); maximally flat (MF) delay filters; sine series expansion;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2006.872397
