There has been recent interest in establishing non-line-of-sight links in the solar-blind ultraviolet region for outdoor optical wireless communications. This paper presents a novel channel model combining both photon propagation and detection statistics. The channel capacity with binary inputs is numerically computed for on–off keying and 4-pulse-position modulation (4-PPM) at different baud rates. To approach the capacity, error control coding is applied and a message passing decoding technique is outlined. Simulation results for a running example through the paper indicate that, at a given power, there is an optimum transmitted baud rate that maximizes the achievable data rate on such links. With the application of proper coding techniques, it is demonstrated that a near fifty-fold increase in rate over previous reported designs for this channel is feasible.
© 2012 OSA
Original Manuscript: July 16, 2012
Revised Manuscript: October 15, 2012
Manuscript Accepted: October 15, 2012
Published: November 20, 2012
Mohamed A. El-Shimy and Steve Hranilovic, "Binary-Input Non-Line-of-Sight Solar-Blind UV Channels: Modeling, Capacity and Coding," J. Opt. Commun. Netw. 4, 1008-1017 (2012)