This paper addresses the energy efficiency analysis
of the relay channel under additive white Gaussian noise. We
consider the rate bounds given by decode and forward and the
cut set bound and assume that resources are optimally allocated
to maximize the spectral efficiency according to the channel
information and the sum network energy. The low energy analysis
tools are used to compute the maximum rate per energy (RPE)
and the slope of the spectral efficiency as a function of the
energy per bit. Using these metrics, the energy efficiency benefit
of several capabilities at terminals is investigated. Specifically,
we take into account: i) the phase synchronization between
transmitters, ii) the full duplex capability at the relay and iii)
the channel access via superposition.
CitationGómez, J.; Pérez, A.; Najar, M. Energy efficient communications over the AWGN relay channel. "IEEE transactions on Wireless communications", 08 Gener 2010, vol. 9, núm. 1, p. 32-37.
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