Full-duplex gigabit indoor optical wireless communication system with CAP modulation
Institute of Electrical and Electronics Engineers Inc.
Electron Science Research Institute
In this letter, we propose and experimentally demonstrate an indoor optical wireless communication system with over 1-Gb/s data transmission, for both downlink and uplink. A low-cost vertical cavity surface emitting laser with limited modulation bandwidth is used as the uplink light source, and it is directly modulated with the carrierless-amplitude-phase (CAP) format; 1 Gb/s (4-CAP), 1.5 Gb/s (8-CAP), and 2 Gb/s (16-CAP) uplink transmissions are achieved and the results demonstrate a receiver sensitivity better than -17 dBm (at a bit error rate of 10-3). In addition, the tradeoff between the bit rate and the system performance in terms of receiver sensitivity and beam coverage area is investigated. © 2015 IEEE.