OFDMA-based high resolution sensor node ToA estimation in non-homogenous medium of human body

Document Type

Conference Proceeding

Publication Date

6-23-2016

Abstract

© 2016 IEEE. This paper introduces a novel and effective time-of-arrival (ToA) based range measurement of sensor nodes deployed within Non-homogenous (NH) medium consisting of time and frequency dispersive sub-medias via orthogonal frequency division multiple access (OFDMA) subcarriers. In the proposed technique, each sensor node exploits pre-allocated orthogonal subcarriers to construct a ranging waveform which enables ToA estimation in dispersive NH media. Here, a set of measurements applying different carrier frequencies are employed to construct a system of linearly independent equations for the available NH channel. The system of equations is used to calculate the thickness of each sub-media. The results are incorporated to refine the estimated ToA and calculate the actual distance between each transmitter and receiver within NH media. Simulation results confirm that the proposed technique is feasible for ranging within NH medium such as human body considering time and frequency dispersion impacts on wide-band waveform.

Publication Title

International Symposium on Medical Information and Communication Technology, ISMICT

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