國立臺灣大學電機工程學系暨研究所李枝宏2006-07-252018-07-062006-07-252018-07-062004-07-31http://ntur.lib.ntu.edu.tw//handle/246246/8008本計劃已完成預期之研究工作一基於 L1 與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，基於最小絕對值重建誤差與 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L1 與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 in the sense of absolute value of reconstruction error and least-squares stopband response criteria 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/pdf258904 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/246246/8008/1/922219E002014.pdf