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Minimax Design of Two-Channel Nonuniform-Division Filterbanks Using IIR Allpass Filters.
- Source :
- IEEE Transactions on Signal Processing; Nov2004, Vol. 52 Issue 11, p3227-3240, 14p
- Publication Year :
- 2004
-
Abstract
- The design of two-channel linear-phase nonuniform-division filter (NDF) banks' constructed by infinite impulse response (IIR) digital allpass filters (DAFS) in the sense of L<subscript>∞</subscript> error criteria is considered. First, the theory of two-channel NDF bank structures using two IIR DAFs is developed. Then, the design problem is appropriately formulated to result in a simple optimization problem. Utilizing a variant of Karmarkar's algorithm, we can efficiently solve the optimization problem through a frequency sampling and Iterative approximation method to find the coefficients for the HR DAFs. The resulting two-channel NDF banks can possess approximately linear-phase response without magnitude distortion. The effectiveness of the proposed technique is achieved by forming an appropriate Chebyshev approximation of a desired phase response and then to find Its solution from a linear subspace in a few Iterations. Several simulation examples are presented foi illustration and comparison. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1053587X
- Volume :
- 52
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Signal Processing
- Publication Type :
- Academic Journal
- Accession number :
- 14800041
- Full Text :
- https://doi.org/10.1109/TSP.2004.836532