Efficient implementation of error-feedback LSL algorithm

作     者：Miranda, MD Gerken, M da Silva, MTM 

作者机构：Univ Sao Paulo Escola Politecn Dept Elect Engn BR-05508900 Sao Paulo Brazil 

出 版 物：《ELECTRONICS LETTERS》 (电子学快报)

年 卷 期：1999年第35卷第16期

页      面：1308-1309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：least squares approximations table lookup error-feedback LSL algorithm Digital signal processing Interpolation and function approximation (numerical analysis) Signal processing theory errors filtering theory feedback echo suppression numerical stability parallel algorithms lookup tables prediction errors signal processing acoustic echo cancellation least squares lattice algorithm computational complexity reduction Filtering methods in signal processing real-time adaptive filtering Parallel programming and algorithm theory adaptive filters fast implementations wordlength reduction computational complexity 

摘      要：An error feedback LSL algorithm is presented which has a reduced computational complexity and makes use of both a priori and a posteriori prediction errors. A simple numerical convention is proposed to assure numerical stability for poor persistent excitation. Simulation results illustrate that divisions can be implemented with reduced wordlength without leading to a significant decrease in the overall accuracy even in floating-point implementations. This fact allows the use of lookup tables for implementing divisions. Moreover, the proposed algorithm has an inherent parallelism that can be advantageously exploited for fast implementations.