https://scholars.lib.ntu.edu.tw/handle/123456789/498422
標題: | Linear-phase quadrature mirror filters with coefficients -1, 0 and + 1. | 作者: | JU-HONG LEE Jung, Tz-Chou |
關鍵字: | Discrete optimization; Quadrature mirror filter banks; Weighted least squares | 公開日期: | 1997 | 卷: | 56 | 期: | 1 | 起(迄)頁: | 91-101 | 來源出版物: | Signal Processing | 摘要: | This paper considers the linear-phase quadrature mirror filters (LP-QMFs) with coefficients constrained to the values of -1, 0 and + 1. A new filter structure and a design technique based on a recently developed weighted least-squares (WLS) algorithm are presented. First, we design an LP-QMF with continuous coefficients using the WLS algorithm. This design process provides two favourable design results that the prototype LP analysis filter has least-squares stopband response and the resulting QMF bank shows quasi-equiripple reconstruction error behavior. In conjunction with the new proposed filter structure, we then present an efficient method to obtain a design solution with coefficients restricted to -1, 0 and + 1 in the minimax sense. Several design examples demonstrating the effectiveness of the proposed technique are provided. © 1997 Elsevier Science B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/498422 https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030673731&doi=10.1016%2fs0165-1684%2896%2900152-1&partnerID=40&md5=7c1cacaf3b563cf5dfeb71611982a8b2 |
ISSN: | 01651684 | DOI: | 10.1016/S0165-1684(96)00152-1 | SDG/關鍵字: | Algorithms; Least squares approximations; Signal filtering and prediction; Least squares stopband response; Linear phase quadrature mirror filters (LPQMF); Weighted least square (WLS) algorithms; Digital filters |
顯示於: | 電機工程學系 |
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