Full-Duplex Wireless-Powered Relay With Self-Energy Recycling

By Yong Zeng, Rui Zhang. IEEE Wireless Communications Letters, 2014

315 citations recorded by the source corpus.

This letter studies a wireless-powered amplify-and-forward relaying system, where an energy-constrained relay node assists the information transmission from the source to the destination using the energy harvested from the source. We propose a novel two-phase protocol for efficient energy transfer and information relaying, in which the relay operates in full-duplex mode with simultaneous energy harvesting and information transmission. Compared with the existing protocols, the proposed design possesses two main advantages: 1) it ensures uninterrupted information transmission since no time switching or power splitting is needed at the relay for energy harvesting; and 2) it enables the so-called self-energy recycling, i.e., part of the energy (loop energy) that is used for information transmission by the relay can be harvested and reused in addition to the dedicated energy sent by the source. Under the multiple-input single-output (MISO) channel setup, the optimal power allocation and beamforming design at the relay are derived. Numerical results show a significant throughput gain achieved by our proposed design over the existing time switching based relay protocol.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/5ad81336c9759af9677bb71f35bf5824d3dc9692

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Citations in the corpus

Communications and Signals Design for Wireless Power Transmission (2016, background): “communication could occur concurrently at the wireless devices with the novel concept of energy/information fullduplex, where each wireless device performs simultaneous energy harvesting and information transmission, with the additional benefit of self-energy recycling [204].”
Fundamental Green Tradeoffs: Progresses, Challenges, and Impacts on 5G Networks (2016, methodology): “Functionality Separation for UDN [6, 89, 102] Joint Cell Association and Power Control [107, 108] Range Expansion and Interference Coordination [103] Cooperative Signal Processing over Front-haul [109, 110]”
A Tutorial on Fluid Antenna System for 6G Networks: Encompassing Communication Theory, Optimization Methods and Hardware Designs (2024, background): “For instance, interference can be utilized to enhance received power for energy harvesting, as suggested by [266], but high received power does not necessarily translate to maximum information transfer.”
Fundamentals of Wireless Information and Power Transfer: From RF Energy Harvester Models to Signal and System Designs (2018, background): “…SWIPT systems are also investigated in multi-user cooperative communications under various different setups, such as with TS-and/or PS-based half-duplex relaying [35], [36], [125], as well as full-duplex relays with simultaneous information transmission and energy harvesting [126], [127].”
Simultaneous Wireless Information and Power Transfer (SWIPT): Recent Advances and Future Challenges (2018, background): “studied in [97], [161], [165], and [166] with a three-node fullduplex relay channel and WPT.”