Design of near perfect reconstruction oversampled filter banks forsubband adaptive filters

摘要

In this brief, a design algorithm for real-valued andncomplex-valued oversampled filter banks which yield a low level ofninband alias and enable simple subband adaptive structures is presented.nThe filter banks are either based on complex modulation of a real-valuednlow-pass prototype or on the direct or modulated setups of real-valuednfilter banks. If real-valued filter banks are required, then thendifferent channels will have different subsampling ratios so that thenbandpass sampling theorem is not violated. This brief also presentsndesign examples of real-valued and complex-valued filter banks