An experimental investigation into the influence of user state and environment on fading characteristics in wireless body area networks at 2.45 GHz

S.L. Cotton, W.G. Scanlon

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    Abstract

    Using seven strategically placed, time-synchronized body worn receivers covering the head, upper front and back torso, and the limbs, we have investigated the effect of user state: stationary or mobile and local environment: anechoic chamber, open office area and hallway upon first and second order statistics for on-body fading channels. Three candidate models were considered: Nakagami, Rice and lognormal. Using maximum likelihood estimation and the Akaike information criterion it was established that the Nakagami-m distribution best described small-scale fading for the majority of on-body channels over all the measurement scenarios. When the user was stationary, Nakagami-m parameters were found to be much greater than 1, irrespective of local surroundings. For mobile channels, Nakagami-m parameters significantly decreased, with channels in the open office area and hallway experiencing the worst fading conditions.
    Original languageUndefined
    Pages (from-to)6-12
    Number of pages7
    JournalIEEE Transactions on Wireless Communications
    Volume8
    Issue numberIssue
    DOIs
    Publication statusPublished - Jan 2009

    Keywords

    • IR-76741
    • EWI-20067

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