Research on Demodulation Technology of Ultraviolet Communication System Based on AVR microcontroller

Making use of frequency modulation to implement elect ro-optic modulation,and receiving ultraviolet light that frequency is variable,signal can been demodulated.In this paper,transmission rate of ultraviolet communication system has been enhanced by using a kind of demodulation method with AVR microcontroller;this method,which has properly dealt with the transition area problems of 2FSK signals,has properly demodulated the original signals from the modulated signals.The transmission rate achieves 4.8 kbit/s,and thus realizes real time speech communication.