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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