Energy-Efficient Hybrid Duplexing Strategy for Bi-Directional Distributed Antenna Systems

Wei, Z, Sun, S, Zhu, X ORCID: 0000-0002-7371-4595, Huang, Y ORCID: 0000-0001-7774-1024 and Wang, J (2018) Energy-Efficient Hybrid Duplexing Strategy for Bi-Directional Distributed Antenna Systems IEEE Transactions on Vehicular Technology, 67 (6). pp. 5096-5110. ISSN 0018-9545, 1939-9359

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Abstract

IEEE We propose a bi-directional distributed antenna (DA) system where DAs are capable of working dynamically in hybrid duplex modes: full duplex (FD), half duplex (HD) and sleep, which enables higher degree of freedom and hence much higher energy efficiency (EE) than DA sole-FD systems, with just marginal loss in spectral efficiency (SE). The proposed system also demonstrates significant EE and SE enhancement over FD co-located antenna systems. Compared to the above two benchmark systems, the proposed system also requires much simpler self-interference cancellation (SIC) design for FD mode due to less cross talks between antennas. A low-complexity EE maximization scheme is proposed for the bi-directional DA system. A channel gain based DA clustering algorithm is first performed to activate/deactivate transmit/receive chains, which highlights the characteristics of DA deployment, and then a distributed hybrid duplexing (Dis-Hyb-Duplexing) algorithm is performed to optimize the downlink beamformer and the uplink transmission power. Various practical aspects are taken into account for system design, such as self-interference at DAs in FD mode, co-channel interference from uplink users to downlink users, and multiuser interference in both uplink and downlink. The effectiveness of the proposed system is verified by simulation results.

Item Type:	Article
Uncontrolled Keywords:	Hybrid duplexing, full duplex, half duplex, distributed antennas, energy efficiency
Depositing User:	Symplectic Admin
Date Deposited:	06 Jun 2018 10:55
Last Modified:	01 Mar 2026 01:40
DOI:	10.1109/TVT.2018.2814047
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3022200
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