Payami, S;
Balasubramanya, NM;
Masouros, C;
Sellathurai, M;
(2018)
Phase Shifters Versus Switches: An Energy Efficiency Perspective on Hybrid Beamforming.
IEEE Wireless Communications Letters
, 8
(1)
pp. 13-16.
10.1109/LWC.2018.2846221.
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Abstract
Hybrid beamforming architectures provide promising solutions to harness the benefits of massive multi-input multi-output systems by incorporating phase shifters, switches, or their combinations. This letter addresses the design of such architectures from an energy efficiency (EE) perspective. We provide closed-form expressions to compare several promising hybrid beamforming architectures, and also derive optimal numbers of antennas required for maximizing the EE. Our results indicate that the asymptotic closed-forms provide a good approximation even for a relatively small number of antennas. Moreover, the combination of phase shifters and switches offers significantly higher EE versus conventional phase shifter-only architectures, while nearly preserving spectral efficiency.
| Type: | Article |
|---|---|
| Title: | Phase Shifters Versus Switches: An Energy Efficiency Perspective on Hybrid Beamforming |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/LWC.2018.2846221 |
| Publisher version: | https://doi.org/10.1109/LWC.2018.2846221 |
| 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: | Phase shifters, Radio frequency, Antennas, Array signal processing, Fading channels, MIMO communication, Power demand |
| 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/10058935 |
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