Experimental and simulated evaluation of long distance NLOS UV communication

In this paper, experimental measurements of path loss and pulse broadening in long-distance non-line-of-sight (N-LOS) ultraviolet (UV) communications are reported and analyzed, with measurements at distances up to 4 km. The comparison of these results with a multiple-scattering channel model based on the Monte Carlo simulation of photon propagation provides strong evidence of the validity of this modeling approach. Additionally, channel models incorporating the effects of turbulence are also considered, but mismatch between experimental results and predictions of the turbulence models suggest the potential for model refinement. Overall, the experimental and simulation results presented here serve to advance the study of NLOS UV channel modeling, an essential component of communication system design.