Asynchronous multiple access using flexible bandwidth allocation scheme in SCM-based 32/64QAM-OFDM VLC system

Asynchronous multiple access using flexible bandwidth allocation scheme in SCM-based... This paper reports a novel asynchronous multiple access using flexible bandwidth allocation scheme in sub-channels-multiplexing-based visible light communication system, adopting quadrature amplitude modulation orthogonal frequency division multiplexing modulation. In this demonstration, an ordinary phosphorescent light-emitting diode with relatively low modulation bandwidth is used. Four sub-channels without any channel spacing are adopted to simultaneously support four users. By using this scheme combined with frequency domain equalization, the data rate of each user can be dynamically reconfigured from 10 to 120 Mb/s, and the overall throughput is above 125 Mb/s at a distance of 120 cm. Furthermore, a data rate of 225 Mb/s by adopting two sub-channels at a distance of 66 cm within the FEC limit of $$3.8\times 10^{-3}$$ 3.8 × 10 - 3 has been also achieved. This scheme has good scalability for supporting more terminals, and high spectrum efficiency due to the dynamic traffic reconfiguration, which shows that it has great potential advantages in future access network. Photonic Network Communications Springer Journals

Asynchronous multiple access using flexible bandwidth allocation scheme in SCM-based 32/64QAM-OFDM VLC system

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Springer US
Copyright © 2013 by Springer Science+Business Media New York
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
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