Browsing by Author "Chang, Yin-Shao"

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SUBBAND ADAPTIVE FILTERING USING APPROXIMATELY ALIAS-FREE COSINE MODULATED FILTERBANKS
(2008)
Chang, Yin-Shao
;
Phoong, See-May
;
Lin, Yuan-Pei
;
電控工程研究所
;
Institute of Electrical and Control Engineering
In this paper, we use a class of cosine modulated filter-ank (CMFB) with approximately reconstruction property for subband adaptive filtering. We show that even after the subband filters are included, the CMFB maintains the approximately alias-free property. In earlier designs, when the filterbank has real coefficients, the alias-free property is usually destroyed after subband filters are inserted. The CMFB has real coefficients and the computational complexity for filtering and subband adaptation is less than that of complex-valued filterbanks. Numerical simulations will be given to demonstrate its approximately alias-free property and fast convergence.