Title :
Design of variable fractional delay allpass filter using weighted least squares method
Author :
Tseng, Chien-Cheng
Author_Institution :
Dept. of Comput. & Commun. Eng., Nat. Kaohsiung First Univ. of Technol. & Sci., Taiwan
Abstract :
In this paper, a weighted least squares method is presented to design a variable fractional delay allpass filter. First, each coefficient of the variable allpass filter is expressed as the polynomial of the fractional delay parameter. Then, by minimizing the phase approximation error, the optimal polynomial coefficients can be obtained by solving a set of linear simultaneous equations. Finally, the design examples are demonstrated to illustrate the effectiveness of the proposed approach.
Keywords :
all-pass filters; delays; design engineering; digital filters; error analysis; least squares approximations; polynomials; fractional delay parameter polynomial; linear simultaneous equations; optimal polynomial coefficients; phase approximation error minimization; variable allpass filter coefficients; variable fractional delay allpass filter design; weighted least squares method; Delay; Design methodology; Finite impulse response filter; Frequency response; IIR filters; Least squares approximation; Least squares methods; Polynomials; Signal sampling; Speech synthesis;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010803
