Multirate systems and filter banks
Multirate systems and filter banks
Subband processing for broadband microphone arrays
Journal of VLSI Signal Processing Systems - Special issue on array optimization and adaptive tracking algorithms
Oversampled filter banks: Optimal noise shaping, design freedom, and noise analysis
ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97)-Volume 3 - Volume 3
Oversampled filter banks as error correcting codes: theory and impulse noise correction
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Theory of optimal orthonormal subband coders
IEEE Transactions on Signal Processing
Noise reduction in oversampled filter banks using predictive quantization
IEEE Transactions on Information Theory
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Oversampled filter banks (OSFBs) have been considered for channel coding, since their redundancy can be utilised to permit the detection and correction of channel errors. In this paper, we propose an OSFB-based channel coder for a correlated additive Gaussian noise channel, of which the noise covariance matrix is assumed to be known. Based on a suitable factorisation of this matrix, we develop a design for the decoder's synthesis filter bank in order to minimise the noise power in the decoded signal, subject to admitting perfect reconstruction through paraunitarity of the filter bank. We demonstrate that this approach can lead to a significant reduction of the noise interference by exploiting both the correlation of the channel and the redundancy of the filter banks. Simulation results providing some insight into these mechanisms are provided.