工业无线网络Krylov子空间估计与动态信道选择  

Krylov subspace estimation and dynamic channel choice of industrial wireless network

作　　者：邓昌建[1,2] 陈东义[1] 张衡[3] 胡红阳[1] 凌建中[1] 

机构地区：[1]电子科技大学自动化工程学院,成都611731 [2]成都信息工程学院控制工程系,成都610225 [3]西南大学计算机与信息技术学院,重庆400700

出　　处：《计算机工程与应用》2015年第11期62-66,共5页Computer Engineering and Applications

基　　金：中加国际科技合作项目(No.2009DFA12100)

摘　　要：在工业无线传感网络中,信道性能要进行估计,工作信道要进行选择,以保证通信的可靠性。以分析工业环境噪声为基础,建立Krylov子空间频率选择接收信道模型,并分析信道中接收信号的时空性能。根据信道估计分析,提出使用时延判断信道的优劣的动态信道选择方法。实验数据表明,该方法能提高有效通讯距离2 m左右,减少丢包率30%以上。In industrial wireless sensor networks, the performance of channel should be estimated and the operating channel should be selected to ensure reliability of communication. Based on analysis of industrial noise, the model of frequency selective receiving channel of Krylov subspace is established, and the time-space performance of receiving signal is analyzed. According to the analysis of channel estimation, a method of dynamic channel selection which judges the quality of channel based on time delay is introduced. Experimental results show it can increase 2 meters of communication distance,and can reduce the packet loss rate 30% or so.

关 键 词：子空间 噪声模型 信道估计 有效通信距离 信道选择 

分 类 号：TN911.7[电子电信—通信与信息系统]