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[1] Bao Shudi, Shen Lianfeng, Zhang Yuanting, et al. On-body propagation characterization based on FDTD methodfor 2.4/5.2/5.7 GHz wearable body sensor networks [J]. Journal of Southeast University (English Edition), 2007, 23 (2): 151-155. [doi:10.3969/j.issn.1003-7985.2007.02.001]
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On-body propagation characterization based on FDTD methodfor 2.4/5.2/5.7 GHz wearable body sensor networks()
基于FDTD方法的2.4/5.2/5.7 GHz穿戴式躯域 传感器网络体表信道特征分析
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
23
Issue:
2007 2
Page:
151-155
Research Field:
Information and Communication Engineering
Publishing date:
2007-06-30

Info

Title:
On-body propagation characterization based on FDTD methodfor 2.4/5.2/5.7 GHz wearable body sensor networks
基于FDTD方法的2.4/5.2/5.7 GHz穿戴式躯域 传感器网络体表信道特征分析
Author(s):
Bao Shudi1, 2, Shen Lianfeng1, Zhang Yuanting2
1National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
2Joint Research Centre for Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong, China
鲍淑娣1, 2, 沈连丰1, 张元亭2
1东南大学移动通信国家重点实验室, 南京 210096; 2香港中文大学生物医学工程联合研究中心, 中国香港
Keywords:
channel model;  path loss;  time delay characteristics;  wearable body sensor network
信道模型;  路径损耗;  时延特性;  穿戴式躯域传感器网络
PACS:
TN929.5
DOI:
10.3969/j.issn.1003-7985.2007.02.001
Abstract:
The on-body path loss and time delay of radio propagation in 2.4/5.2/5.7 GHz wearable body sensor networks(W-BSN)are studied using Remcom XFDTD, a simulation tool based on the finite-difference time-domain method.The simulation is performed in the environment of free space with a simplified three-dimensional human body model.Results show that the path loss at a higher radio frequency is significantly smaller.Given that the transmitter and the receiver are located on the body trunk, the path loss relevant to the proposed minimum equivalent surface distance follows a log-fitting parametric model, and the path loss exponents are 4.7, 4.1 and 4.0 at frequencies of 2.4, 5.2, 5.7 GHz, respectively.On the other hand, the first-arrival delays are less than 2 ns at all receivers, and the maximum time delay spread is about 10 ns.As suggested by the maximum time delay spread, transmission rates of W-BSN must be less than 108 symbol/s to avoid inter-symbol interference from multiple-path delay.
应用基于时域有限差分法(FDTD)的XFDTD仿真工具分析研究2.4/5.2/5.7 GHz穿戴式躯域传感器网络(W-BSN)的体表路径损耗和时延特性.仿真环境为置于自由空间中的简化三维人体模型.分析结果表明, 当工作频率较高时, 路径损耗相对较小;当发送点和接收点都置于主躯干时, 路径损耗与最小等效体表距离遵循对数拟合模型, 并且2.4, 5.2, 5.7 GHz下的衰减指数分别为4.7, 4.1和4.0.另一方面, 各接收点的首径延迟约小于2 ns, 而最大时延扩展为10 ns.为避免多径延迟引起的码间干扰, 建议W-BSN的传输速率应小于108符号/s.

References:

[1] Konstantas D, van Halteren A, Bults R, et al.Mobile patient monitoring:the MobiHealth system [J].Journal on Information Technology in Healthcare, 2004, 2(5):365-373.
[2] Gyselinckx B, van Hoof C, Ryckaert J, et al.Human++:autonomous wireless sensors for body area networks [C]//Proc of IEEE Custom Integrated Circuits Conf.San Jose, CA, USA, 2005:13-19.
[3] Hall P S, Ricci M, Hee T M.Measurements of on-body propagation characteristics [C]//Proc of IEEE Antenna and Propagation Society Intl Symposium.San Antonio, TX, USA, 2002:310-313.
[4] Nechayev Y I, Hall P S, Constantinou C C, et al.On-body path loss variations with changing body posture and antenna position [C]//Proc of IEEE Antenna and Propagation Society Intl Symposium.Washington DC, USA, 2005:731-734.
[5] Roelens L, Joseph W, Martens L.Characterization of the path loss near flat and layered biological tissue for narrowband wireless body area networks [C]//Proc of IEEE Workshop on Wearable and Implantable Body Sensor Networks.Boston, MA, USA, 2006:50-56.
[6] Yee K S.Numerical solution of initial boundary value problems involving Maxwell’s equations in isotropic media [J].IEEE Trans on Antennas and Propagation, 1966, 14(3):302-307.
[7] Gabriel C. Compilation of the dielectric properties of body tissues at RF and microwave frequencies [EB/OL].(1996-06-20)[2006-10-03].http://www.fcc.gov/cgi-bin/dielec.sh.
[8] Sarkar T K, Zhong J, Kyungjung K, et al.A survey of various propagation models for mobile communication [J].IEEE Antenna and Propagation Magazine, 2003, 45(3):51-82.

Memo

Memo:
Biographies: Bao Shudi(1977—), female, graduate;Shen Lianfeng(corresponding author), male, professor, lfshen@seu.edu.cn.
Last Update: 2007-06-20