Title :
An efficient and simple method for designing prototype filters for cosine-modulated pseudo-QMF banks
Author :
Cruz-Roldán, Fernando ; Amo-López, Pedro ; Maldonado-Bascón, Saturnino ; Lawson, Stuart S.
Author_Institution :
Dept. of Teoria de la Senal y Comunicaciones, Escuela Politecnica de la Univ. de Alcala, Alcala de Henares, Spain
Abstract :
We present a new method to design prototype filters for conventional cosine-modulated pseudo-quadrature mirror filter (QMF) banks. This method is based on windowing, and sets the 3-dB cutoff frequency of the filter obtained at /spl pi//2M. In this way, the filter bank performance can be significantly improved compared to other existing design methods.
Keywords :
channel bank filters; quadrature mirror filters; cosine-modulated pseudo-QMF banks; cosine-modulated pseudo-quadrature mirror filter banks; cutoff frequency; filter bank performance; prototype filters; windowing; Associate members; Cutoff frequency; Design methodology; Equations; Filter bank; Filtering theory; Finite impulse response filter; Mirrors; Prototypes; Signal synthesis;
Journal_Title :
Signal Processing Letters, IEEE
