169 / 2019-06-20 10:24:08

LED visible light communication system using frequency division multiplexing (FDM) technique

visible light communication, signal processing, frequency modulation, frequency division multiplexing

A LED visible light communication system is proposed based on frequency division multiplexing (FDM) technique. Which can transmit analog and digital signals by different channels with a single LED. The main idea of this system is to modulate above two signals with different frequency carriers, and then add them together through an adder to finally drive a LED. The receiving modulated light signals is amplified, filtered, reshaped, and finally demodulated to restore the original input signal.