Picture of athlete cycling

Open Access research with a real impact on health...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

Explore open research content by Physical Activity for Health...

Channel estimation and transmit power control in wireless body area networks

Di Franco, Fabio and Tachtatzis, Christos and Atkinson, Robert C. and Tinnirello, Ilenia and Glover, Ian A. (2015) Channel estimation and transmit power control in wireless body area networks. IET Wireless Sensor Systems, 5 (1). pp. 11-19. ISSN 2043-6386

[img]
Preview
Text (DiFranco-etal-IETWSS2014-channel-estimation-transmit-power-wireless-networks)
DiFranco_etal_IETWSS2014_channel_estimation_transmit_power_wireless_networks.pdf - Accepted Author Manuscript

Download (748kB) | Preview

Abstract

Wireless body area networks have recently received much attention because of their application to assisted living and remote patient monitoring. For these applications, energy minimisation is a critical issue since, in many cases, batteries cannot be easily replaced or recharged. Reducing energy expenditure by avoiding unnecessary high transmission power and minimising frame retransmissions is therefore crucial. In this study, a transmit power control scheme suitable for IEEE 802.15.6 networks operating in beacon mode with superframe boundaries is proposed. The transmission power is modulated, frame-by-frame, according to a run-time estimation of the channel conditions. Power measurements using the beacon frames are made periodically, providing reverse channel gain and an opportunistic fade margin, set on the basis of prior power fluctuations, is added. This approach allows tracking of the highly variable on-body to on-body propagation channel without the need to transmit additional probe frames. An experimental study based on test cases demonstrates the effectiveness of the scheme and compares its performance with alternative solutions presented in the literature.