Design of fractional delay filters using least square error and Fourier series
N. Babaii, Abdolreza Nabavi · 2003
This paper presents two new methods for designing finite impulse response (FIR) fractional delay filters (FD). These methods, firstly, sample from basic delay system Z/sup -D/ - when D is not integer - in the frequency domain, and then find a polynomial in integer power of Z using least square fittings approximation and Fourier series expansion. Examples are given to illustrate the accuracy of the techniques.