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Design of near perfect reconstruction oversampled filter banks for subband adaptive filters

Harteneck, M and Weiss, Stephan and Stewart, Robert (1999) Design of near perfect reconstruction oversampled filter banks for subband adaptive filters. IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 46 (8). pp. 1081-1085. ISSN 1057-7130

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