摘要
现有的人体体表通信信道模型仅限于单频或UWB频段的体表传输,且只考虑了静态人体姿势下的场景。利用时域有限差分方法建立35种连续姿势下的人体模型,分析动态人体通信信道(HBC)的传输特性。确立了路径损耗与通信距离的正比关系;将修正后的S-V模型作为动态人体信道模型分析多径效应,并进行了验证;最后,根据二阶信息准则确定了平均功率增益的累计概率密度符合对数正态分布。结果与UWB频段下进行对比,人体运动在HBC频段下对人体通信传输特性的影响更小,更适合动态人体的体表通信。
Existing models of human body surface communication channels only consider the single frequency or UWB(ultra wide band)frequency band,and the research objects are static human body model.This paper established 35 human body mo-dels in continuous postures based on FDTD(finite difference time domain)method and analyzed the transmission characteristics of dynamic HBC(human body communication)channel.It confirmed that path loss was directly proportional to the communication distance.This paper analyzed the multipath effect of dynamic human body channel by using the modified S-V model,and verified this model.Finally,this paper determined that the cumulative probability density of the average power gain conformed to the lognormal distribution according to the second-order information criterion.By comparing this result with that of UWB band,body motions in HBC frequency band had less influence on body communication transmission characteristics.Therefore,the HBC frequency band is more suitable to body surface communication.
作者
周灵丽
廖薇
侯宋跃
Zhou Lingli;Liao Wei;Hou Songyue(School of Electronic&Electrical Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《计算机应用研究》
CSCD
北大核心
2021年第10期3120-3124,共5页
Application Research of Computers
基金
国家自然科学基金资助项目(62001282)
“上海高校青年东方学者”岗位计划资助项目(QD2017043)。
