摘要
人体通信是以人体生物组织为传输介质的新型短距离通信技术,现有人体通信技术的相关研究局限于单人通信。基于此,研究了低频段下双人动态通信的传输特性,在通过手臂接触进行双人通信的情况下,首先分析了非接触手臂沿着垂直人体的方向,向前和向后运动对通信信道特性的影响;在非接触手臂运动的情况下,发射端放置在接触手臂或非接触手臂时,其各自对应的2条通信链路的路径损耗变化趋势几乎一样;利用二阶信息准则判定多径信号中第一径到达时间的累计概率密度符合Weibull分布;最后对比了发射端在不同位置下的通信特性,在手臂发生运动的情况下,发射端放置在双人接触手臂时的链路通信效果较好且对人体辐射较小。
Human body communication is a new short-distance communication technology using human body as the transmission medium.The current research on human communication technology is limited to single-person human communication.Therefore,the transmission characteristics of two-person dynamic communication were analyzed in low frequency band.Firstly,in the case of two-person communication through arm contact,the influence of the forward and backward motion of the non-contact arm along the direction perpendicular to the human body on the communication channel characteristics was analyzed.In the case of non-contact arm motion,when the transmitting end was placed on the contact arm or the non-contact arm,the path loss trend of the two communication links was almost the same.Then,the second order information criterion was used to determine that the cumulative probability density of the first path arrival time in the multipath signal conformed to Weibull distribution.Finally,the communication characteristics of the transmitting end at different positions were compared.In the case of arm movement,the link communication effect is better and the radiation to human body is smaller when the transmitting end is placed between the two-person contact arms.
作者
周灵丽
廖薇
侯宋跃
ZHOU Lingli;LIAO Wei;HOU Songyue(School of Electronic and Electrical Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2023年第9期1154-1160,共7页
Engineering Journal of Wuhan University
基金
国家自然科学基金项目(编号:62001282)
“上海高校青年东方学者”岗位计划资助项目(编号:QD2017043)。
关键词
人体通信
双人动态通信
时域有限差分方法
时延扩展
路径损耗
human body communication(HBC)
two-person dynamic communication
finite-difference time domain(FDTD)method
delay spread
path loss
