  This paper looks at the performance of an outdoor visible light (OVLC)
communication system used for Internet-of-Vehicles (IoV). In the proposed
system an amplify-and-forward (AF) opportunistic scheme is used to extend the
range of information broadcast from a traffic light to vehicles. The
Gamma-Gamma channel gain and the Lambertian direct current (DC) channel gain
are used to model the fading coefficient of each transmission and the short and
thermal noise models used to represent the system noise. The statistics of the
system are examined by deriving closed-form expressions for the cumulative
distribution function (CDF) and probability density function (PDF) for the
equivalent end-to-end signal-to-noise ratio (SNR). Novel closed form equations
are also developed for the outage probability and ergodic capacity. Numerical
simulations performed showed that the system performance in terms of both
outage probability and ergodic capacity improves with decreasing turbulence
intensity. Results also illustrate that, as the distance between the vehicles
increases, the system performance is more deteriorated.
