Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/69063
Title: A sequential reoptimization approach for the design of signed power-of-two coefficient lattice QMF bank
Authors: Yu, Y.J.
Lim, Y.C. 
Keywords: Perfect Reconstruction
Quadrature Mirror Filter
Sensitivity Measure
Signed Power-of-two
Issue Date: 2001
Source: Yu, Y.J.,Lim, Y.C. (2001). A sequential reoptimization approach for the design of signed power-of-two coefficient lattice QMF bank. IEEE Region 10 International Conference on Electrical and Electronic Technology : 57-60. ScholarBank@NUS Repository.
Abstract: This paper presents a sequential optimization approach for the design of lattice structure quadrature mirror filter (QMF) banks subject to the sum of signed power-of-two (SPT) coefficient constraints. The lattice structure QMF bank structurally guarantees the perfect reconstruction (PR) property. Nevertheless, its frequency response is still adversely affected by coefficient quantization. In this paper, a frequency response deterioration measure is developed from the lattice coefficient analysis. Based on this frequency response deterioration measure, the coefficient which will cause the largest deterioration in the frequency response of the filter is selected for quantization first. After the coefficient is quantized, the remaining unquantized coefficients are reoptimized. The process of quantizing the coefficient and reoptimizing the remaining unquantized coefficient is repeated until all the coefficients are quantized. The frequency responses of the filters obtained using oar algorithm are significantly superior to those obtained by simple rounding of the coefficient values.
Source Title: IEEE Region 10 International Conference on Electrical and Electronic Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/69063
ISBN: 0780371011
Appears in Collections:Staff Publications

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