室内环境对ZigBee无线网络信号传输强度的影响  

Effect of Indoor Environment on Signal Transmission Strength of ZigBee Wireless Network

作　　者：李鹏斐[1] 王伟[1] 刘炳楠 张志永 高道伟 LI Pengfei;WANG Wei;LIU Bingnan;ZHANG Zhiyong;GAO Daowei(Science and Technology on Electromechanical Dynamic Control Laboratory,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机电动态控制重点实验室,北京100081

出　　处：《兵工学报》2020年第S02期275-279,共5页Acta Armamentarii

基　　金：国家自然科学基金面上项目(51777010)。

摘　　要：室内空间利用无线网络进行定位的算法中质心定位法等需要利用信号强度测距,但由于室内空间环境复杂,基于信号强度的测距模型准确性对室内无线网络定位精度影响较大。分析影响室内无线网络接收信号强度的主要因素,通过实验研究了收发终端距地高度、天线方向、接收终端移动方向和人体遮挡4种因素对信号传输强度的影响。根据实测数据建立了典型室内无其他障碍物遮挡环境中接收信号强度随传输距离的衰减模型。研究结果表明,所建立的室内空间无其他障碍物遮挡环境信号强度衰减模型,提供了更为准确的信号强度与传输距离之间的关系。Indoor wireless network spatial localization algorithms,such as centroid localization algorithm,require signal strength ranging,but due to the complexity of the indoor spatial environment,the accuracy of the ranging model based on signal strength has a significant impact on the positioning accuracy of indoor network.The main factors that affect the strength of the received signal in indoor wireless network are analyzed.The influences of four factors,including the height of the transceiver terminal from the ground,the antenna orientation of the terminal,the moving direction of receiving terminal,and the human body shielding,on the transmitted signal strength are experimentally studied.Based on the measured data,a model for the attenuation of received signal strength with transmission distance in a typical indoor environment without other obstacles is established.The signal strength can be accurately measured by analyzing the influences of different environmental factors.The signal strength attenuation model of indoor environment without other obstacles established in the paper provides more accurate relationship between signal strength and transmission distance.

关 键 词：ZIGBEE无线网络 室内定位 接收信号强度 信号强度衰减模型 

分 类 号：TN961[电子电信—信号与信息处理]