Friendly co-existence of phosphorescent white and infrared LEDs in optical wireless communications
In this study, the authors demonstrate that transmission rate in white phosphorescent light emitting diode (LED) transmitter communication-illumination system can be increased significantly by simultaneous transmission of an additional infrared (IR) channel. Unlike in typical colour multiplexing, the IR channel does not require a dedicated receiver filter as the channel crosstalk can be removed using digital signal processing. Both channels can operate in synchronous or asynchronous mode. The experimental results in this study demonstrate a significant increase in the data rate.