https://scholars.lib.ntu.edu.tw/handle/123456789/294319
標題: | Minimax Design of Two-Channel IIR QMF Banks with Arbitrary Group Delay | 作者: | JIUN-HAW LEE I.-C. Niu JU-HONG LEE |
公開日期: | 十二月-2001 | 卷: | 148 | 期: | 6 | 起(迄)頁: | 384-390 | 來源出版物: | IEE Proceedings-Vision, Image and Signal Processing | 摘要: | The paper deals with the minimax design of two-channel infinite impulse response (IIR) QMF banks with arbitrary group delay, for which the IIR analysis filters and the resulting filter bank possess the frequency response optimal in the minimax (L∞) sense. Utilising a lattice structure for the denominators of the IIR analysis filters, a design technique is presented based on an approximation scheme and a weighted least-squares (WLS) algorithm, previously developed by one of the authors for solving the resulting design problem that is basically a nonlinear optimisation problem. During the design process, this technique finds the tap coefficients for the numerator and the reflection coefficients for the denominator of the prototype IIR analysis filter simultaneously. The stability of the designed prototype IIR analysis filter is ensured by incorporating an efficient stabilisation procedure to make all of the reflection coefficient values fall between -1 and +1. Computer simulations show the effectiveness of the proposed design technique. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035718916&doi=10.1049%2fip-vis%3a20010673&partnerID=40&md5=2340cf1242ade671e6007c9db7f559cd | DOI: | 10.1049/ip-vis:20010673 | SDG/關鍵字: | Algorithms; Computer simulation; Frequency response; Iterative methods; Least squares approximations; Linearization; Low pass filters; Nonlinear programming; Optimization; Weighted least squares (WLS) algorithms; IIR filters |
顯示於: | 電機工程學系 |
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00982305.pdf | 507.63 kB | Adobe PDF | 檢視/開啟 |
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