國立臺灣大學電機工程學系暨研究所李枝宏國立臺灣大學電機工程學系暨研究所2006-07-252018-07-062006-07-252018-07-062003-07-31http://ntur.lib.ntu.edu.tw//handle/246246/7952本計劃已完成預期之研究工作一基於 L2 最佳化準則的FIR 具有線性相位且低相 位延遲之鏡像對稱副頻帶濾波器組之理論與設計，基於最小平方重建誤差與最小平 方FIR 濾波器止帶響應之設計理論，在本 項研究內，我們研發基於L2 最佳化理論設 計以FIR 濾波器為架構具有線性相位且低 相位延遲之鏡像對稱之副頻帶濾波器組理 論與設計技術。在理論上，研究推導FIR 具有線性相位且低相位延遲之鏡像對稱之 副頻帶濾波器組的系統架構模型。然後， 研發設計此副頻帶濾波器組的最佳化技 術。電腦模擬實驗已驗證本計畫成果之有 效性。This project has accomplished research work for the development of the theory and system structure of FIR quadrature mirror filter (QMF) banks with linear phase and low group delay response. Utilizing an approximation scheme and an iterative algorithm, we have developed a method to design a two-channel QMF bank with continuous coefficients under the design criteria, namely, least-squares reconstruction error and least-squares stopband response for analysis filters. It is shown that the optimal filter coefficients can be obtained by solving only linear equations. In conjunction with an iterative algorithm, a method is then presented to obtain the desired design result. The effectiveness of the proposed design technique is demonstrated by several simulation examples.application/pdf115288 bytesapplication/pdfzh-TW國立臺灣大學電機工程學系暨研究所有限脈衝響應濾波器副頻帶數 位濾波器組FIR FiltersSubband Filter Banksreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/7952/1/912219E002046.pdf