Joint power allocation for the multi-user NOMA-downlink in a power-line-fed VLC network

Feng, Simeng, Bai, Tong and Hanzo, Lajos (2019) Joint power allocation for the multi-user NOMA-downlink in a power-line-fed VLC network. IEEE Transactions on Vehicular Technology, 68 (5), 5185-5190. (doi:10.1109/TVT.2019.2906095).

Record type: Article

Abstract

Visible light communications (VLC) constitutes as a promising downlink technique of supporting the ever-increasing tele-traffic. Since the ubiquitous mains power line constitutes a natural backbone feed for VLC, a combined power line and VLC network is conceived, where the source data is fed by power line communications (PLC) into the VLC network. We refer to it as a PLC-VLC network, where the power-line connects the light emitting diodes (LED) without requiring a duplicated filter-backbone. Then the information is forwarded to multiple users via visible light. Furthermore, to increase the downlink bit rate, non-orthogonal multiple access (NOMA) is invoked in VLC. For the sake of maximizing the sum-throxughput, we conceive a joint PLC-VLC power allocation (JPA) strategy, where the power allocated both to the PLC and to the VLC links is jointly determined upon analysing the power-relationship between them. Our simulations demonstrate that NOMA significantly outperforms orthogonal multiple access (OMA) with the aid of the proposed JPA.

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final(7) - Accepted Manuscript

Available under License University of Southampton Accepted Manuscript Licence.

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