Non-uniform time sampling FIR filter design based on least-squares criterion

作     者：Jin, Z. King, J. Li, X. -D. 

作者机构：Sun Yat Sen Univ Sch Informat Sci & Technol Guangzhou 510006 Guangdong Peoples R China S China Agr Univ Sch Engn Guangzhou 510642 Guangdong Peoples R China 

出 版 物：《ELECTRONICS LETTERS》 (电子学快报)

年 卷 期：2010年第46卷第23期

页      面：1544-1545页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：FIR filter FIR filters filter coefficients finite impluse response digital filter least squares approximations least-squares criterion m-term approximation matching pursuit algorithm nonuniform least-squares filter time sampling 

摘      要：The finite impluse response (FIR) digital filter for non-uniform time samples is investigated. By the upsampling technique this filter design is reduced to determining filter coefficients with many zeros. Only those coefficients that are not zeros correspond to time samples which are used to obtain the filtered output. Determining such a set of filter coefficients is exactly a best m-term approximation problem. The optimal non-uniform least-squares filter is obtained by a matching pursuit algorithm. In general, nonzero filter coefficients are not distributed consecutively in order to ensure the better performance of a filter. Satisfactory performances of the present method have been demonstrated by simulation.