Feedback Stabilization over Wireless Network Using Adaptive Coded Modulation  

作　　者：Li Yang Xin-Ping Guan Cheng-Nian Long Xiao-Yuan Luo 

机构地区：[1]Department of Electrical Engineering,University of Yanshan,Qinhuangdao 066004,PRC

出　　处：《International Journal of Automation and computing》2008年第4期381-388,共8页国际自动化与计算杂志(英文版)

基　　金：National Outstanding Youth Founda-tion (No.60525303);National Natural Science Foundation of China(No.60404022,60704009);Natural Science Foundation of Hebei Province (No.F2005000390,F2006000270).

摘　　要：In this paper,we apply adaptive coded modulation (ACM) schemes to a wireless networked control system (WNCS) to improve the energy efficiency and increase the data rate over a fading channel.To capture the characteristics of varying rate, interference,and routing in wireless transmission channels,the concepts of equivalent delay (ED) and networked condition index (NCI) are introduced.Also,the analytic lower and upper bounds of EDs are obtained.Furthermore,we model the WNCS as a multicontroller switched system (MSS) under consideration of EDs and loss index in the wireless transmission.Sufficient stability condition of the closed-loop WNCS and corresponding dynamic state feedback controllers are derived in terms of linear matrix inequality (LMI). Numerical results show the validity and advantage of our proposed control strategies.In this paper,we apply adaptive coded modulation (ACM) schemes to a wireless networked control system (WNCS) to improve the energy efficiency and increase the data rate over a fading channel.To capture the characteristics of varying rate, interference,and routing in wireless transmission channels,the concepts of equivalent delay (ED) and networked condition index (NCI) are introduced.Also,the analytic lower and upper bounds of EDs are obtained.Furthermore,we model the WNCS as a multicontroller switched system (MSS) under consideration of EDs and loss index in the wireless transmission.Sufficient stability condition of the closed-loop WNCS and corresponding dynamic state feedback controllers are derived in terms of linear matrix inequality (LMI). Numerical results show the validity and advantage of our proposed control strategies.

关 键 词：Wireless networked control system (WNCS) adaptive coded modulation (ACM) equivalent delay (ED) networked condition index (NCI) multicontroller switched system (MSS) stability. 

分 类 号：TN925[电子电信—通信与信息系统]