Adaptive filtering with bandwidth constraints in the feedback path

作     者：Orosz, Gyoergy Sujbert, Laszlo Peceli, Gabor 

作者机构：Budapest Univ Technol & Econ Dept Measurement & Informat Syst H-1117 Budapest 11 Hungary 

出 版 物：《SIGNAL PROCESSING》 (信号处理)

年 卷 期：2012年第92卷第1期

页      面：130-138页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：New Szechenyi Plan [TAMOP-4.2.1/B-09/1/KMR-2010-0002] 

主　　题：Wireless control Networked control systems Signed-error algorithm Adaptive filter based controller FxLMS algorithm 

摘      要：This paper introduces a new, adaptive-filter-based controller that shows advantageous properties from the viewpoint of its communication requirement. The algorithm is called signed-error filtered-x LMS (SE-FxLMS). Its novelty is characterized by the fact that it makes possible data compression in the feedback path of adaptive-filter-based control loops in a very simple way. This feature is especially useful in such closed-loop systems where the feedback signals are transmitted over a low-bandwidth communication channel. This is a typical case in so-called networked control systems (NCS), where the communication is carried out over a shared communication channel, e.g., using a wireless sensor network. The paper introduces an analysis of the algorithm as well. (C) 2011 Elsevier B.V. All rights reserved.