Design and Experimental Evaluation of Improved Least Squares and Weighted Least Squares Quadrature Mirror Filters(Digital Signal Processing)

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概要

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• The least squares (LS) and the weighted least squares (WLS) algorithms are well known procedures that are used in the design of quadrature mirror filters (QMFs). It is known that these design techniques suffer from pass-band anomaly under certain conditions. A recent method, that overcomes pass-band anomaly for LS QMFs using a frequency sampling design for the initial filter, is extended to WLS design in this letter. A comparison between the modified LS and WLS designs based on experimental results is presented. Although WLS designs have been reported to have superior near-equiripple stop-band performance as compared to LS designs, we find that this is not always true. Specifically, LS designs, with inherent computational and robustness advantages, also have better peak stop-band ripple and transition bandwidth at higher cut-off frequencies than WLS.

• 社団法人電子情報通信学会の論文
• 2006-01-01

著者

• Vinod A.p.

  Nanyang Technological Univ. Singapore

• VINOD A.P.

  School of Computer Engineering, Nanyang Technological University

関連論文

• Design and Experimental Evaluation of Improved Least Squares and Weighted Least Squares Quadrature Mirror Filters(Digital Signal Processing)

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