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Dual-Layered MIMO Transmission for Increased Bandwidth Efficiency

Masouros, C; Hanzo, L; (2016) Dual-Layered MIMO Transmission for Increased Bandwidth Efficiency. IEEE Transactions on Vehicular Technology , 65 (5) pp. 3139-3149. 10.1109/TVT.2015.2438776. Green open access

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Abstract

A dual layered downlink transmission scheme is proposed for intrinsically amalgamating multiple-input-multipleoutput spatial multiplexing (SMX) with spatial modulation (SM). The proposed scheme employs a classic SMX transmission which is known to offer a superior bandwidth efficiency compared to SM. We exploit receive antenna based SM (RSM) on top of this transmission as an enhancement of the bandwidth efficiency. The RSM here is applied to the combined spatial and power-level domain, not by activating and de-activating the receive antennas, but rather by choosing between two power levels fP1; P2g for the received symbols in these antennas. In other words the combination of symbols received at a power level P1 carries information in the spatial domain in the same manner as the combination of non-zero elements in the receive symbol vector carries information in the RSM transmission. This allows for the coexistence of RSM with SMX and the results show an increased bandwidth efficiency for the proposed scheme compared to both SMX and SM. To characterize the proposed scheme, we carry out a mathematical analysis of its performance and we use this to optimize the ratio between P1 and P2 for attaining the minimum error rates. Our analytical and simulation results demonstrate significant bandwidth efficiency gains for the proposed scheme compared to conventional SMX and SM.

Type: Article
Title: Dual-Layered MIMO Transmission for Increased Bandwidth Efficiency
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TVT.2015.2438776
Publisher version: http://dx.doi.org/10.1109/TVT.2015.2438776
Language: English
Additional information: Copyright © 2015 IEEE. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see http://creativecommons.org/licenses/by/4.0/.
Keywords: Bandwidth, Modulation, Radio frequency, Receiving antennas, Complexity theory, MIMO, transmit precoding, Spatial modulation, spatial multiplexing, multiple-input-multiple-output systems
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/1473951
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