Title :
Practical design of multi-channel oversampled warped cosine-modulated filter banks
Author :
Vashkevich, M.I. ; Wan, W. ; Petrovsky, A.A.
Author_Institution :
Comput. Egeneering Dept., Belarusian State Univ. of Inf. & Radioelectron., Minsk, Belarus
Abstract :
A practical approach to optimal design of multichannel oversampled warped cosine-modulated filter banks (CMFB) is proposed. Warped CMFB is obtained by all- pass transformation of uniform CMFB. The paper addresses the problems of minimization amplitude distortion and suppression of aliasing components emerged due to oversampling of filter bank channel signals. Pro- posed optimization-based design considerably reduces distortions of overall filter bank transfer function taking into account channel subsampling ratios.
Keywords :
channel bank filters; transfer functions; aliasing component suppression; all-pass transformation; channel subsampling ratios; filter bank channel signals; minimization amplitude distortion; multichannel oversampled warped cosine-modulated filter banks; optimization-based design; overall filter bank transfer function; uniform CMFB; Nonuniform filter bank; optimization;
Conference_Titel :
Wireless Mobile and Computing (CCWMC 2011), IET International Communication Conference on
Conference_Location :
Shanghai
DOI :
10.1049/cp.2011.0844
