Multirate systems and filter banks
Multirate systems and filter banks
Time-Varying Filter Banks with Variable System Delay
ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97)-Volume 3 - Volume 3
ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97) -Volume 1 - Volume 1
Time-varying orthogonal filter banks without transient filters
ICASSP '95 Proceedings of the Acoustics, Speech, and Signal Processing, 1995. on International Conference - Volume 02
Exact reconstruction analysis/synthesis filter banks with time-varying filters
ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: digital speech processing - Volume III
Convolutional codes using finite-field wavelets: time-varying codes and more
IEEE Transactions on Signal Processing
Flexible tree-structured signal expansions using time-varyingwavelet packets
IEEE Transactions on Signal Processing
Factorization approach to unitary time-varying filter bank treesand wavelets
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Theory and design of optimum FIR compaction filters
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
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Time-varying wavelets are highly desired in exploiting the nonstationarity of signals. However, it is difficult to hold the perfect reconstruction (PR) and regularity properties simultaneously in the construction of time-varying wavelets. This paper proposes a simple method to construct time-varying orthogonal wavelets based on the lattice structure of two-channel paraunitary (PU) filter banks, in which both the PR and orthogonality properties are well preserved. The regularity conditions imposed on the lattice structure are expressed in terms of the lattice coefficients and the wavelet filter banks are obtained by using an optimization technique. Then the time-varying orthogonal wavelets can be constructed by the lattice structure formulation for time-varying filter banks. Design examples show that this method is of great flexibility and effectiveness.