  Energy-harvesting (EH) and wireless power transfer in cooperative relaying
networks have recently attracted a considerable amount of research attention.
Most of the existing work on this topic however focuses on Rayleigh fading
channels, which represent outdoor environments. In contrast, this paper is
dedicated to analyze the performance of dual-hop relaying systems with EH over
indoor channels characterized by log-normal fading. Both half-duplex (HD) and
full-duplex (FD) relaying mechanisms are studied in this work with
decode-and-forward (DF) and amplify-and-forward (AF) relaying protocols. In
addition, three EH schemes are investigated, namely, time switching relaying,
power splitting relaying and ideal relaying receiver which serves as a lower
bound. The system performance is evaluated in terms of the ergodic outage
probability for which we derive accurate analytical expressions. Monte Carlo
simulations are provided throughout to validate the accuracy of our analysis.
Results reveal that, in both HD and FD scenarios, AF relaying performs only
slightly worse than DF relaying which can make the former a more efficient
solution when the processing energy cost at the DF relay is taken into account.
It is also shown that FD relaying systems can generally outperform HD relaying
schemes as long as the loop-back interference in FD is relatively small.
Furthermore, increasing the variance of the log-normal channel has shown to
deteriorate the performance in all the relaying and EH protocols considered.
