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Optimal time slot design in an OFDM-TDMA system over power-line time-variant channels

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3 Author(s)
Tonello, A.M. ; DIEGM, Univ. di Udine, Udine ; Cortes, J.A. ; D'Alessandro, S.

This paper analyzes the resource allocation problem in an indoor PLC system with a physical (PHY) layer based on OFDM and a medium access control (MAC) scheme with contention and adaptive TDMA regions, similar to the one of the HomePlug AV specification. In particular, this work focuses in the optimization of the TDMA region. By taking into account both the cyclostationary noise and the cyclic variations of the channel response, the optimal time slot duration in a multi-user scenario is determined for various amounts of overhead required by the PHY layer. Hence, the presented results can be used in practical systems to perform a fast real-time time slot length selection and scheduling as a function of the number of active users.

Published in:

Power Line Communications and Its Applications, 2009. ISPLC 2009. IEEE International Symposium on

Date of Conference:

March 29 2009-April 1 2009