Title :
Design of pseudo-QMF banks with rational sampling factors using several prototype filters
Author :
Argenti, Fabrizio ; Brogelli, Benedetto ; Re, Enrico Del
Author_Institution :
Dept. di Ingegneria Electron., Univ. di Firenze, Italy
fDate :
6/1/1998 12:00:00 AM
Abstract :
A method is presented for designing filter banks that allow the spectrum of a signal to be split into nonuniform width subbands. The filters of the banks are obtained by the cosine modulation of more than one prototype. The method uses the cancellation of the main aliasing component of the reconstructed signal. This imposes constraints on the prototypes that become dependent on each other. The procedure can be applied to banks with both integer and rational decimation factors. Numerical examples are presented to show the effectiveness of the design procedure
Keywords :
band-pass filters; filtering theory; modulation; network synthesis; quadrature mirror filters; signal reconstruction; signal sampling; aliasing component cancellation; cosine modulation; integer decimation factor; nonuniform filter banks design; nonuniform width subbands; prototype filters; pseudo-QMF banks design; rational decimation factor; rational sampling factors; reconstructed signal; spectrum splitting; Chirp; Filter bank; Frequency estimation; Frequency modulation; Matrices; Polynomials; Prototypes; Sampling methods; Signal processing; Signal processing algorithms;
Journal_Title :
Signal Processing, IEEE Transactions on
