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International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 232564, 10 pages
http://dx.doi.org/10.1155/2012/232564
Research Article

Performance of Ultrawideband Wireless Tags for On-Body Radio Channel Characterisation

1School of Electronic Engineering and Computer Science, Queen Mary University of London, London E1 4NS, UK
2Department of Electrical and Electronic Engineering, American International University-Bangladesh, Dhaka 1213, Bangladesh

Received 16 February 2012; Accepted 21 June 2012

Academic Editor: C. Aanandan

Copyright © 2012 Mohammad Monirujjaman Khan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Experimental characterisation of on-body radio channel for ultrawideband (UWB) wireless active tags is reported in this paper. The aim of this study is to investigate the performance of the commercially available wireless tags on the UWB on-body radio channel characterisation. Measurement campaigns are performed in the chamber and in an indoor environment. Statistical path loss parameters of nine different on-body radio channels for static and dynamic cases are shown and analyzed. Results demonstrated that lognormal distribution provides the best fits for on-body propagation channels path loss model. The path loss was modeled as a function of distance for 34 different receiver locations for propagation along the front part of the body. A reduction of 11.46% path loss exponent is noticed in case of indoor environment as compared to anechoic chamber. In addition, path loss exponent is also extracted for different body parts (trunk, arms, and legs). Second-order channel parameters as fade probability (FP), level crossing rate (LCR), and average fade duration (AFD) are also investigated.