Title :
Discretization-free design of variable fractional-delay FIR filters
Author_Institution :
Dept. of Inf. Sci., Toho Univ., Chiba, Japan
Abstract :
This paper presents a closed-form solution for obtaining the optimal coefficients of variable FIR filters with continuously adjustable fractional-delay (FD) response. The design is formulated as a weighted-least-squares (WLS) approximation problem without discretizing the frequency and fractional-delay parameters. Compared with the existing WLS method, the discretization-free one can yield a closed-form optimal solution with considerably reduced computational complexity
Keywords :
FIR filters; circuit complexity; delays; digital filters; filtering theory; least squares approximations; optimisation; WLS approximation problem; closed-form optimal solution; computational complexity reduction; continuously adjustable fractional-delay response; discretization-free design; optimal coefficients; variable fractional-delay FIR filters; weighted-least-squares approximation; Computational complexity; Digital filters; Digital signal processing; Finite impulse response filter; Frequency response; Information science; Interpolation; Lagrangian functions; Polynomials; Sampling methods;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921148
