Photonics Research, 2013, 1 (2): 02000065, Published Online: Jan. 18, 2019
Visible light communications: 3.75 Mbits/s data rate with a 160 kHz bandwidth organic photodetector and artificial neural network equalization [Invited]
Abstract
This paper presents an experimental demonstration of a visible light communications link with an light emitting diode and a low-bandwidth organic photodetector as transmitter and receiver, respectively, that achieves sub 4 Mbits / s speeds. An artificial neural network (ANN) equalizer is required in order to achieve such high data rates because of the influence of intersymbol interference. The digital modulation formats tested in this paper are nonreturn-to-zero on–off keying (OOK), and fourth-order pulse position modulation (4-PPM). Without equalization, data rates of 200 and 300 kbits / s can be achieved for 4-PPM and OOK, respectively. With ANN equalization, data rates of 2.8 and 3.75 Mbits / s can be achieved for the first time for OOK and 4-PPM, respectively.
Zabih Ghassemlooy, Paul Anthony Haigh, Francesco Arca, Sandro Francesco Tedde, Oliver Hayden, Ioannis Papakonstantinou, Sujan Rajbhandari. Visible light communications: 3.75 Mbits/s data rate with a 160 kHz bandwidth organic photodetector and artificial neural network equalization [Invited][J]. Photonics Research, 2013, 1(2): 02000065.