NLOS UV Channel Modeling Using Numerical Integration and an Approximate   Closed-Form Path Loss Model
  In this paper we propose a simulation method using numerical integration, and develop a closed-form link loss model for physical layer channel characterization for non-line of sight (NLOS) ultraviolet (UV) communication systems. The impulse response of the channel is calculated by assuming both uniform and Gaussian profiles for transmitted beams and different geometries. The results are compared with previously published results. The accuracy of the integration approach is compared to the Monte Carlo simulation. Then the path loss using the simulation method and the suggested closed-form expression are presented for different link geometries. The accuracies are evaluated and compared to the results obtained using other methods. 
Ankit Gupta, Mohammad Noshad and Ma\"it\'e Brandt-Pearce
physics.optics