A Complez-error and Phase-error Constrained Least-Squares Design of FIR Filters with Reduced Group Delay Error

摘要：

The group delay of a linear-phase FIR filter is about half of its length. Existing methods for low group-delay FIR filter design usually result in large group delay error, noticeably towards the bandedges. Recently, Lai 2 presented a constrained least-squares design method that can specify both magnitude-error and phase-error upper bounds. Reduced group-delay error can be obtained by using a sigmoid phase-error upper-bound function in the method. In this paper, we improve the method by using a modified complex approximation error, such that we can more flexibly specify the magnitude and phase errors, and smaller magnitude error can be obtained under the same phase-error constraint. A multiple-exchange algorithm is used to solve the complex-error and phase-error constrained least-squares design problem. Through design examples, the proposed design method is compared with several existing method. Design examples demonstrate the effectiveness the proposed method.

关键词： FIR filters reduced group delay constrained least-squares

作者: Xiaoping Lai Yan Zuo Yunfei Guo Dongliang Peng

作者单位: Institute of Information and Control, Hangzhou Dianzi University, Hangzhou, 310018 China

会议类型: 国际会议

会议名称: 2009年中国控制与决策会议(2009 Chinese Control and Decision Conference)

会议地点: 广西桂林

会议语种:英文

页码: 1967-1972

在线出版日期: 2009-06-17（万方平台首次上网日期，不代表论文的发表时间）