studies of scattering, reflectivity, and transmitivity in wban channel feasibility of using uwb研究散射、反射率和transmitivity在wban通道使用超宽频的可行性.pdf

Sensors 2010, 10, 5503-5529; doi:10.3390/s100605503 OPEN ACCESS sensors ISSN 1424-8220 /journal/sensors Article Studies of Scattering, Reflectivity, and Transmitivity in WBAN Channel: Feasibility of Using UWB Md. Humaun Kabir, Kazi Ashrafuzzaman, M. Sanaullah Chowdhury and Kyung Sup Kwak * Graduate School of IT Telecommunication Engineering, Inha University, Yonghyun-Dong 253, Nam-Gu, Incheon 402-751, Korea; E-Mails: hakim2021@ (M.H.K); ashraf@cu.ac.bd (K.A.); sana1691@ (M.S.C.) * Author to whom correspondence should be addressed; E-Mail: kskwak@inha.ac.kr; Tel.: +82-10-8698-4688; Fax: +82-032-876-7349. Received: 9 April 2010; in revised form: 20 May 2010 / Accepted: 21 May 2010 / Published: 2 June 2010 Abstract: The Wireless Personal Area Network (WPAN) is one of the fledging paradigms that the next generation of wireless systems is sprouting towards. Among them, a more specific category is the Wireless Body Area Network (WBAN) used for health monitoring. On the other hand, Ultra-Wideband (UWB) comes with a number of desirable features at the physical layer for wireless communications. One big challenge in adoption of UWB in WBAN is the fact that signals get attenuated exponentially. Due to the intrinsic structural complexity in human body, electromagnetic waves show a profound variation during propagation through it. The reflection and transmission coefficients of human body are highly dependent upon the dielectric constants as