Wireless Information and Power Transfer: Spectral Efficiency Optimization for Asymmetric Full-Duplex Relay Systems

Wei, Zhongxiang, Sun, Sumei, Zhu, Xu ORCID: 0000-0002-7371-4595, Huang, Yi ORCID: 0000-0001-7774-1024, Dong, Linhao and Kim, Dong In (2017) Wireless Information and Power Transfer: Spectral Efficiency Optimization for Asymmetric Full-Duplex Relay Systems. In: 2017 IEEE 85th Vehicular Technology Conference (VTC Spring), 2017-6-4 - 2017-6-7.

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Abstract

To address the problem of unbalanced received signal-to-interference-and-noise ratio (SINR) at relay and destination nodes in wireless power transfer (WPT)- supported relay system, we propose a novel asymmetric full-duplex (FD) decode-and-forward (DF) WPT relay strategy, where the transmission time slots are not necessarily identical. By introducing asymmetric time slots, higher degree of freedom is obtained than the conventional symmetric WPT relay system. Furthermore, based on the asymmetric strategy, we develop a spectral efficiency (SE)- oriented resource allocation algorithm by jointly designing time slots, transmission power at source and relay. Simulation results show that the proposed asymmetric system demonstrates higher SE than the symmetric WPT-powered FD and the time- switching based FD relay systems. Besides, more energy can be harvested at the relay node by the proposed system benefiting from the enhanced degree of freedom, showing its applicability in WPT-powered relay systems.

Item Type:	Conference or Workshop Item (Unspecified)
Uncontrolled Keywords:	Full duplex, asymmetric relay, wireless power transfer, optimization
Depositing User:	Symplectic Admin
Date Deposited:	08 Jun 2018 09:50
Last Modified:	16 Mar 2024 21:01
DOI:	10.1109/vtcspring.2017.8108445
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3022285