Wireless Information and Power Transfer With Full Duplex Relaying

Abstract

We consider a dual-hop full-duplex relaying system, where the energy constrained relay node is powered by radio frequency signals from the source using the time-switching architecture, both the amplify-and-forward and decode-andforward relaying protocols are studied. Specifically, we provide an analytical characterization of the achievable throughput of three different communication modes, namely, instantaneous transmission, delay-constrained transmission, and delay tolerant transmission. In addition, the optimal time split is studied for different transmission modes. Our results reveal that, when the time split is optimized, the full-duplex relaying could substantially boost the system throughput compared to the conventional halfduplex relaying architecture for all three transmission modes. In addition, it is shown that the instantaneous transmission mode attains the highest throughput. However, compared to the delayconstrained transmission mode, the throughput gap is rather small. Unlike the instantaneous time split optimization which requires instantaneous channel state information, the optimal time split in the delay-constrained transmission mode depends only on the statistics of the channel, hence, is suitable for practical implementations.

Time Switching for Wireless Communications with Full-Duplex Relaying in Imperfect CSI Condition

“…In [10], the authors confirm that at high SINR regime, there is no significant difference in performance when adding this extra antenna. Hence, we only consider the case that only the information receiving antenna is used to collect energy.…”

“…7 shows the values of optimal switching factor α * according to different values of s P while 0.1 . As in the case of perfect CSI [10], the throughput first increases with the transmission rate R , and then decreases when R increases beyond the rate value of 3 / bps Hz . In other words, for a particular transmit power, there exists a unique transmission rate which yields maximum throughput.…”

“…The application of wireless information and power transfer to full-duplex relaying systems was first introduced in [10]. In that paper, the authors focused on a source-relay-destination dual-hop scenario where the relay is powered via RF energy harvesting, and derived throughput performance analysis of the system.…”

“…Using the similar setup as [10], we consider a FD relaying system equipped with two separate antennas, one for information transmission and one for information reception.…”

The Performance of Wireless Powered MIMO Relaying With Energy Beamforming

“…The performance analysis of relay selection in a wireless powered cooperative relays has been studied in [11], [12]. Meanwhile, in the context of full-duplex (FD) relaying, the authors in [13] proposed exploiting both antennas at the FD relay (i.e., the receive and transmit antennas) to increase the harvested energy during the power transfer period using the time switching receiver, thus resulting in an improved overall system throughput. However, all these works are limited to single antenna nodes and therefore face numerous challenges.…”