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Energy efficient MIMO SWIPT by hybrid analog-digital beamforming

Li, A; Masouros, C; (2017) Energy efficient MIMO SWIPT by hybrid analog-digital beamforming. In: Proceedings of the 2017 IEEE 18th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC). IEEE: Sapporo, Japan. Green open access

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Abstract

In this paper, we investigate the simultaneous wireless information and power transfer (SWIPT) for MIMO systems with limited RF chains at the base station. We focus on the scenario where there is one information decoder with a targeted SINR and several separate energy receivers with energy harvesting thresholds. Based on the observation that the fully-digital beamformer consists of only the information beamformer, we propose an iterative hybrid analog-digital beamforming scheme, where we design the analog beamformer by minimizing the difference between the fully-digital beamformer and the hybrid beamformer, and the optimal solution can be obtained via a geometrical interpretation. Numerical results show that the proposed scheme can achieve a close-to-optimal performance with significant gains in the total power consumption over fully-digital SWIPT.

Type: Proceedings paper
Title: Energy efficient MIMO SWIPT by hybrid analog-digital beamforming
Event: 2017 IEEE 18th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
Location: Sapporo, JAPAN
Dates: 03 July 2017 - 06 July 2017
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/SPAWC.2017.8227793
Publisher version: https://doi.org/10.1109/SPAWC.2017.8227793
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: MIMO, SWIPT, hybrid beamforming, iterative design
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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/10076015
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