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Low RF-Complexity Millimeter-Wave Beamspace-MIMO Systems by Beam Selection

Amadori, PV; Masouros, C; (2015) Low RF-Complexity Millimeter-Wave Beamspace-MIMO Systems by Beam Selection. IEEE TRANSACTIONS ON COMMUNICATIONS , 63 (6) pp. 2212-2223. 10.1109/TCOMM.2015.2431266. Green open access

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Abstract

Communications in millimeter-wave (mm-wave) spectrum (30-300 GHz) have experienced a continuous increase in relevance for short-range, high-capacity wireless links, because of the wider bandwidths they are able to provide. In this work, we introduce a new mm-wave frequency transmission scheme that exploits a combination of the concepts of beamspace multi-input multi-output (B-MIMO) communications and beam selection to provide near-optimal performances with a low hardware-complexity transceiver. While large-scale MIMO approaches in mm-wave are affected by high dimensional signal space that increases considerably both complexity and costs of the system, the proposed scheme is able to achieve near-optimal performances with a reduced radio-frequency (RF) complexity thanks to beam selection. We evaluate the advantages of the proposed scheme via capacity computations, comparisons of numbers of RF chains required and by studying the trade-off between spectral and power efficiency. Our analytical and simulation results show that the proposed scheme is capable of offering a significant reduction in RF complexity with a realistic low-cost approach, for a given performance. In particular, we show that the proposed beam selection algorithms achieve higher power efficiencies than a full system where all beams are utilized.

Type: Article
Title: Low RF-Complexity Millimeter-Wave Beamspace-MIMO Systems by Beam Selection
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TCOMM.2015.2431266
Publisher version: http://dx.doi.org/10.1109/TCOMM.2015.2431266
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/
Keywords: High dimensional MIMO, multiuser MIMO, beam selection, capacity maximization, SINR maximization, beamforming
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/1468649
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