摘要
为了解决地下环境中无线磁感应通信系统存在路径损耗大,无法实现较远距离通信的问题,本文构建了基于波导技术与协同技术的磁感应信道模型。通过波导技术,向收发线圈之间引入无源中继线圈,经过谐振线圈的磁耦合完成信号传递;通过协同技术,传输的磁感应波由多条不同路径到达接收端,从而完成信息的传输。对路径损耗、误码率等特性仿真分析,结果表明:路径损耗小于100 dB时,普通磁感应系统最大传输距离约为20 m,而磁感应协同系统与波导系统最大距离分别延长至45与150 m以上;在传输距离较近时,磁感应波导系统的路径损耗大于协同系统,可通过减小中继线圈的间距和电阻进一步降低其路径损耗;磁感应协同系统的路径损耗受线圈的位置、间距和数量影响较小,从而降低了部署的难度。因此,构建的两种通信模型都能有效降低信道路径损耗,增大通信距离,波导技术效果更明显。
In order to solve the problem that the wireless magnetic induction communication system in underground environment has large path loss and can not achieve long-distance communication,this paper constructs the magnetic induction channel models based on waveguide technology and collaborative technology.Through waveguide technology,passive relay coils are introduced between the transceiver coils,and the transmission of signals is completed through the magnetic coupling of a series of resonant coils;through cooperative technology,the transmitted magnetic induction wave reaches the receiver by multiple different paths to complete the transmission of information.Through the simulation analysis of path loss,BER and other characteristics,the results show that:when the path loss is less than 100 dB,the maximum transmission distance of the ordinary magnetic induction system is about 20 m,while the maximum distance of the magnetic induction collaborative system and the waveguide system is extended to 45 and 150 m respectively;the path loss of the magnetic induction waveguide system is greater than that of the cooperative system when the transmission distance is close,and its path loss can be further reduced by reducing the spacing and resistance of the relay coils.The path loss of magnetic induction cooperative system is less affected by the location,spacing and number of coils,thus reducing the difficulty of deployment.So,both communication models can effectively reduce the path loss of the channel and increase the communication distance,and the waveguide technology is more effective.
作者
刘宝衡
付天晖
侯文达
Liu Baoheng;Fu Tianhui;Hou Wenda(Naval University of Engineering of PLA,Wuhan 430033,China)
出处
《电子测量技术》
北大核心
2021年第16期18-22,共5页
Electronic Measurement Technology
基金
国家自然科学基金(41631072)项目资助。
关键词
磁感应通信
信道模型
磁感应波导技术
磁感应协同技术
地下通信
magnetic induction communication
channel model
magnetic induction waveguide technology
magnetic induction collaboration technology
underground communications
