Abstract
Distributed switch and stay combining (DSSC) has been considered as an effective technique to achieve spatial diversity in a distributed manner with low processing complexity. In this paper, we incorporate DSSC into a full-duplex dual hop relaying system, where two energy-constrained relay nodes assist the information transmission from the source to the destination using energy wirelessly harvested from the source. By applying DSSC at the destination, this efficient technique not only improves performance of full-duplex relaying systems and increases the system diversity but also reduces the implementation and hardware complexity at the destination. We obtain tight approximate expression for outage probability in the case of using decode-and-forward (DF) relaying protocol and analytical expression for outage probability in the case of using amplify-and-forward (AF) relaying protocol. Numerical results show that our DSSC full-duplex relaying with wireless information and power transfer (WIPT) system achieves the full spatial diversity and has a better performance in terms of outage probability than that of the DSSC half-duplex relaying and conventional full-duplex relaying with WIPT system.
Highlights
Wireless energy transfer through radio frequency (RF) signals has emerged as the promising and effective solution to supply power and prolong the lifetime of energy-constrained wireless networks
We proposed the application of distributed switch and stay combining (DSSC) to full-duplex relaying with wireless information and power transfer (WIPT) networks to improve system performance
We showed that our proposed system has the better performance than the DSSC half-duplex relaying system and conventional full-duplex relaying one according to the system outage probability obtained by numerical results
Summary
Wireless energy transfer through radio frequency (RF) signals has emerged as the promising and effective solution to supply power and prolong the lifetime of energy-constrained wireless networks. In [12], the authors considered a time switching-based full-duplex wireless powered relaying system, where the relay node operated in fullduplex mode with simultaneously information reception and information transmission. They provided an analytical characterization of the achievable throughput of three different communication modes, namely, instantaneous transmission, delay-constrained transmission, and delay tolerant transmission by optimizing time splitting ratio. In this paper, we utilize distributed switch-and-stay combining (DSSC) technique at the destination for the case where two relaying terminals are used to improve the performance of full-duplex relaying with WIPT networks and to reduce the implementation complexity at the destination.
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