Experimental demonstration of bidirectional NOMA-OFDMA visible light communications

Lin, Bangjiang, Ye, Weiping, Tang, Xuan and Ghassemlooy, Zabih (2017) Experimental demonstration of bidirectional NOMA-OFDMA visible light communications. Optics Express, 25 (4). pp. 4348-4355. ISSN 1094-4087

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Official URL: https://doi.org/10.1364/OE.25.004348

Abstract

We propose a non-orthogonal multiple access (NOMA) scheme combined with orthogonal frequency division multiplexing access (OFDMA) for visible light communications (VLC), which offers a high throughput, flexible bandwidth allocation and a higher system capacity for a larger number of users. Bidirectional NOMA-OFDMA VLC is experimentally demonstrated. The effects of power allocation and channel estimation on the bit error rate performance are investigated. The experiment results indicate that accurate channel estimation can eliminate the inter-user interference more effectively. The optimum power allocation ratios for uplink and downlink are both about 0.25 in the case of two users.

Item Type: Article
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 08 Mar 2017 14:57
Last Modified: 08 Mar 2017 14:57
URI: http://nrl.northumbria.ac.uk/id/eprint/30037

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