Permutation Based Design of Orthogonal Block Transformsand Filter Banks
Multidimensional Systems and Signal Processing
Discrete Lagrangian Methods for Designing Multiplierless Two-Channel PR-LP Filter Banks
Journal of VLSI Signal Processing Systems
M-channel cosine modulated filter banks with linear phase analysis and synthesis filters
Signal Processing - Special section: Multimodal human-computer interfaces
Subband Kalman filtering incorporating masking properties for noisy speech signal
Speech Communication
Quantization of filter bank frame expansions through moving horizon optimization
IEEE Transactions on Signal Processing
M-channel linear phase cosine modulated filter banks with perfect reconstruction
MUSP'06 Proceedings of the 6th WSEAS international conference on Multimedia systems & signal processing
Biorthogonal exponentially modulated filter bank
Signal Processing
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We propose a novel way to design maximally decimated FIR cosine modulated filter banks, in which each analysis and synthesis filter has a linear phase. The system can be designed to have either the approximate reconstruction property (pseudo-QMF system) or perfect reconstruction property (PR system). In the PR case, the system is a paraunitary filter bank. As in earlier work on cosine modulated systems, all the analysis filters come from an FIR prototype filter. However, unlike in any of the previous designs, all but two of the analysis filters have a total bandwidth of 2π/M rather than π/M (where 2M is the number of channels in our notation). A simple interpretation is possible in terms of the complex (hypothetical) analytic signal corresponding to each bandpass subband. The coding gain of the new system is comparable with that of a traditional M-channel system (rather than a 2M-channel system). This is primarily because there are typically two bandpass filters with the same passband support. Correspondingly, the cost of the system (in terms of complexity of implementation) is also comparable with that of an M-channel system. We also demonstrate that very good attenuation characteristics can be obtained with the new system