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Multi-Pair Two-Way Massive MIMO Relaying with Zero Forcing: Energy Efficiency and Power Scaling Laws

Qian, J; Masouros, C; Matthaiou, M; (2019) Multi-Pair Two-Way Massive MIMO Relaying with Zero Forcing: Energy Efficiency and Power Scaling Laws. IEEE Transactions on Communications 10.1109/TCOMM.2019.2959329. (In press). Green open access

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Abstract

In this paper, we study a multi-pair two-way half-duplex decode-and-forward (DF) massive multiple-input multiple-output (MIMO) relaying system, in which multiple single-antenna user pairs can exchange information through a massive MIMO relay. For low-complexity transmission, zeroforcing reception/zero-forcing transmission (ZFR/ZFT) is employed at the relay. First, we analytically study the large-scale approximations of the sum spectral efficiency (SE). Furthermore, we focus on three specific power scaling laws to study the trade off between the transmit powers of each pilot symbol, each user and the relay, and also focus on how the transmit powers scale with the number of relay antennas, M, to maintain a finite SE performance. Additionally, we consider a practical power consumption model to investigate the energy efficiency (EE), and illustrate the impact of M and the interplay between the power scaling laws and the EE performance. Finally, we consider the system fairness via maximizing the minimum achievable SE among all user pairs.

Type: Article
Title: Multi-Pair Two-Way Massive MIMO Relaying with Zero Forcing: Energy Efficiency and Power Scaling Laws
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TCOMM.2019.2959329
Publisher version: https://doi.org/10.1109/TCOMM.2019.2959329
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Decode-and-forward relaying, half-duplex, massive MIMO, Max-min fairness, power scaling laws, spectral efficiency and energy efficiency, zero-forcing
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10090831
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