UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Radio-frequency chain selection for energy and spectral efficiency maximization in hybrid beamforming under hardware imperfections

Vlachos, E; Thompson, J; Kaushik, A; Masouros, C; (2020) Radio-frequency chain selection for energy and spectral efficiency maximization in hybrid beamforming under hardware imperfections. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences , 476 (2244) , Article 20200451. 10.1098/rspa.2020.0451. Green open access

[img]
Preview
Text
Kaushik_manuscript_extracted.pdf - Accepted version

Download (498kB) | Preview

Abstract

The next-generation wireless communications require reduced energy consumption, increased data rates and better signal coverage. The millimetre-wave frequency spectrum above 30 GHz can help fulfil the performance requirements of the next-generation mobile broadband systems. Multiple-input multiple-output technology can provide performance gains to help mitigate the increased path loss experienced at millimetre-wave frequencies compared with microwave bands. Emerging hybrid beamforming architectures can reduce the energy consumption and hardware complexity with the use of fewer radio-frequency (RF) chains. Energy efficiency is identified as a key fifth-generation metric and will have a major impact on the hybrid beamforming system design. In terms of transceiver power consumption, deactivating parts of the beamformer structure to reduce power typically leads to significant loss of spectral efficiency. Our aim is to achieve the highest energy efficiency for the millimetre-wave communications system while mitigating the resulting loss in spectral efficiency. To achieve this, we propose an optimal selection framework which activates specific RF chains that amplify the digitally beamformed signals with the analogue beamforming network. Practical precoding is considered by including the effects of user interference, noise and hardware impairments in the system modelling.

Type: Article
Title: Radio-frequency chain selection for energy and spectral efficiency maximization in hybrid beamforming under hardware imperfections
Open access status: An open access version is available from UCL Discovery
DOI: 10.1098/rspa.2020.0451
Publisher version: https://doi.org/10.1098/rspa.2020.0451
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: radio-frequency chain selection, millimetre-wave hybrid multiple-input multiple-output, energy efficiency maximization
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/10120378
Downloads since deposit
17Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item