Title :
Real-time bi-directional visible light communication system utilizing a phosphor-based LED and RGB LED
Author :
Jianyang Shi ; Xingxing Huang ; Yiguang Wang ; Nan Chi
Author_Institution :
Dept. of Commun. Sci. & Eng., Fudan Univ., Shanghai, China
Abstract :
We propose and experimentally demonstrate a 100Mbit/s real-time optical wireless communication system employing a commercially available phosphor-based white LED and a 200Mbit/s real-time system employing a commercially available RGB LED. A 1080p MKV video signal transmission is demonstrated based on QAM-OFDM modulation format under a 4 m free space transmission length. A post-equalization scheme and a blue filter have been utilized in the receiver to increase the frequency response. An optical lens has been utilized in the receiver and a reflection Cup in the transmitter to increase the system sensitivity. With the self-designed time-division multiple access protocol, the bi-directional transmission can be successfully achieved.
Keywords :
OFDM modulation; frequency response; lenses; light emitting diodes; optical communication; optical modulation; phosphors; quadrature amplitude modulation; sensitivity; time division multiple access; QAM-OFDM modulation format; RGB light emitting diode; bidirectional transmission; blue filter; frequency response; optical lens; optical wireless communication system; phosphor-based white LED; post-equalization scheme; real-time bidirectional visible light communication system; receiver cup; reflection cup; self-designed time-division multiple access protocol; sensitivity; size 4 m; video signal transmission; Light emitting diodes; Modulation; Optical filters; Optical transmitters; Real-time systems; Streaming media; Throughput; RGB LED; VLC; real-time; white LED;
Conference_Titel :
Wireless Communications and Signal Processing (WCSP), 2014 Sixth International Conference on
Conference_Location :
Hefei
DOI :
10.1109/WCSP.2014.6992145