Experimental investigation of 16.6 Gbps SDM-WDM visible light communication based on a neural network receiver and tricolor mini-LEDs

Xin Liu, Zixian Wei, Mutong Li, Lei Wang, Zhongxu Liu, Changyuan Yu, Lai Wang, Yi Luo, H. Y. Fu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)


Visible light communication (VLC) based on a lightemitting diode (LED) suffers from a limited bandwidth of commercial LED, device nonlinearity, channel distortion, and transmitted power caused by a complex free-space channel, power amplifier, and illuminant devices resulting in a limited data rate. In this Letter, to provide an alternative high-speed solution, we first designed and fabricated three 175 μmtricolor mini-LEDs with various wavelengths. They are used to set up a spatial division multiplexing-wavelength division multiplexing VLC system over a 2 m link. Then we utilize a neural network receiver to replace the traditional channel estimation, equalization, and demodulation at the offline digital signal processing of the receiver. The experiment showed that the data rates of 2.65, 7, and 7 Gbps were achieved in three respective links using quadrature phase shift keying-optical orthogonal frequency division multiplexing. The three data rates have bit-error rates below the forward error correction limit, whose data rate sum of 16.6 Gbps is the highest mini/micro-LED-based VLC, to the best of our knowledge.

Original languageEnglish
Pages (from-to)2888-2891
Number of pages4
JournalOptics Letters
Issue number12
Publication statusPublished - 15 Jun 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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