室内X波段离体信道传播特性的测量与建模  

Measurement and modeling of X-band indoor vitro channel

作　　者：常浩飞 孙君[1] CHANG Haofei;SUN Jun(College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《电波科学学报》2023年第2期195-204,共10页Chinese Journal of Radio Science

基　　金：江苏省重点研发计划(产业前瞻与关键核心技术)(BE2022067,BE2022067-1,BE2022067-2)。

摘　　要：研究了在X波段以人体为中心环境的无线信道衰落模型建模方法,围绕可穿戴天线在体表不同部位的无线信道进行了实验和分析.分别在离体与无体场景下测量视距(line-of-sight,LoS)和非视距(non-lineof-sight,NLoS)两种路径的信道衰落,对比分析人体不同部位的阴影效应和穿透损耗,结果表明改变天线穿戴部位,信道衰落曲线的损耗指数和截距均会发生变化;人体穿透损耗与信道频率、收发端天线之间的距离无关.基于现有的模型对实验数据进行拟合,提出一种与人体不同部位相关的带有体表阴影效应、穿透损耗修正因子的离体信道衰落模型.该模型细化了人体不同部位的信道特性,与通用模型相比能更加精地确描述离体信道传播环境.In this paper,we study the wireless channel fading model in X-band with a human-centric environment,and the antennas worn on different parts of the body surface are tested.The channel fading of line-of-sight(LoS)or non-line-of-sight(NLoS)links is measured at off-body or no-body scene.We analyze the shadow data and penetration data measured in different parts of the body.The results show that both the loss index and intercept of the channel fading curve will change when the wearing part of the antenna is changed;the penetration loss of the human body has nothing to do with the channel frequency or the distance between the transceiver antennas.We fit the experimental data based on the existing model.Finally,a new off-body channel fading model is proposed,which includes the shadow effect of the body surface and the correction factor of penetration loss for different parts of the human body.The model distinguishes the channel transmission of different parts of the human body.Compared with the general model,it can describe the characteristics of the isolated channel more accurately.

关 键 词：信道测量 无线体域网 路径损耗 人体穿透损耗 人体阴影效应 

分 类 号：TN911.4[电子电信—通信与信息系统]