On-body propagation characterization based on FDTD method for 2.4/5.2/5.7 GHz wearable body sensor networks

作     者：鲍淑娣 沈连丰 张元亭 Bao Shudi;Shen Lianfeng;Zhang Yuanting

作者机构：东南大学移动通信国家重点实验室南京210096 香港中文大学生物医学工程联合研究中心 

出 版 物：《Journal of Southeast University(English Edition)》 (东南大学学报（英文版）)

年 卷 期：2007年第23卷第2期

页      面：151-155页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：The High Technology Research and Development Program of Jiangsu Province (NoBG2005001) the Hong Kong Inno-vation and Technology Fund (NoITS/99/02) 

主　　题：channel model path loss time delay characteristics wearable body sensor network 

摘      要：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 10^8 symbol/s to avoid intersymbol interference from multiple-path delay.