Performance analysis of none-line-of-sight ultraviolet communications with multi-user interference

This paper provides a theoretical model to analyze the performance of non-line-of-sight (NLOS) ultraviolet (UV) communication systems with multi-user interference (MUI). The model is developed on the basis of a multiple-scattering Monte Carlo (MC) model. The system geometry and algorithm flowchart are presented. Numerical simulations are conducted for an application scenario where both a transmitter and an interferer (undesired signal source) are 25m to the receiver. System performance is examined and compared to MUI-free scenario in terms of path loss and probability of error. Simulation results are demonstrated to stress the impact of MUI on the UV system and indicate guidelines for improved system design which include power adjustment, bit rate and interferer´s location.