Chen, Yifan, Teo, Jianqi, Lai, Joshua Chong Yue, Gunawan, Erry, Low, Kay Soon, Soh, Cheong Boon and Rapajic, Predrag B. (2009) Cooperative communications in ultra-wideband wireless body area networks: Channel modeling and system diversity analysis. IEEE Journal on Selected Areas in Communications, 27 (1). pp. 5-16. ISSN 0733-8716 (doi:10.1109/JSAC.2009.090102)

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Abstract

In this paper, we explore the application of cooperative communications in ultra-wideband (UWB) wireless body area networks (BANs), where a group of on-body devices may collaborate together to communicate with other groups of on-body equipment. Firstly, time-domain UWB channel measurements are presented to characterize the body-centric multipath channel and to facilitate the diversity analysis in a cooperative BAN (CoBAN). We focus on the system deployment scenario when the human subject is in the sitting posture. Important channel parameters such as the pathloss, power variation, power delay profile (PDP), and effective received power (ERP) crosscorrelation are investigated and statistically analyzed. Provided with the model preliminaries, a detailed analysis on the diversity level in a CoBAN is provided. Specifically, an intuitive measure is proposed to quantify the diversity gains in a single-hop cooperative network, which is defined as the number of independent multipaths that can be averaged over to detect symbols. As this measure provides the largest number of redundant copies of transmitted information through the body-centric channel, it can be used as a benchmark to access the performance bound of various diversity-based cooperative schemes in futuristic body sensor systems.

Item Type:	Article
Additional Information:	[1] Date of Current Version : 09 January 2009. Issue Date : January 2009. [2] The material in this paper was presented in part at the IEEE 10th International Symposium on Spread Spectrum Techniques and Applications, Bologna, Italy, August 2008.
Uncontrolled Keywords:	body area network, ultra-wideband system, on-body propagation, channel modeling, time-domain measurements, cooperative networks, diversity
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments:	School of Engineering School of Engineering > Department of Computer & Communications Engineering School of Engineering > Mobile & Wireless Communications Research Laboratory
Related URLs:	Publisher Organisation
Last Modified:	14 Oct 2016 09:04
URI:	http://gala.gre.ac.uk/id/eprint/1627

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