Experimental demonstration of bidirectional NOMA-OFDMA visible light communications

Bangjiang Lin; Weiping Ye; Xuan Tang; Zabih Ghassemlooy

doi:10.1364/OE.25.004348

Experimental demonstration of bidirectional NOMA-OFDMA visible light communications

Bangjiang Lin, Weiping Ye, Xuan Tang, Zabih Ghassemlooy

Mathematics, Physics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

104 Citations (Scopus)

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.

Original language	English
Pages (from-to)	4348-4355
Journal	Optics Express
Volume	25
Issue number	4
DOIs	https://doi.org/10.1364/OE.25.004348
Publication status	Published - 16 Feb 2017

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AB - 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.

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Experimental demonstration of bidirectional NOMA-OFDMA visible light communications

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