Investigation of NLOS Ultraviolet Communication Systems Exposed to Periodic Pulse Jamming

This paper presents a theoretical analysis of the impact of periodic pulse jamming on non-line-of-sight (NLOS) ultraviolet communication (UVC) systems. A new probability mass function (PMF) is proposed to describe the proportion of jamming time within a signal slot relative to the entire slot, assuming the jamming pulse period is a multiple of the slot or vice versa. Using this PMF, a closed-form expression for the average bit-error rate (ABER) is derived using the Gauss-Legendre quadrature technique and validated through simulations. The results demonstrate that aerial jammers leveraging line-of-sight links can achieve substantially greater jamming ranges than ground-based jammers relying on NLOS propagation. Furthermore, even jammers operating at low average power levels can significantly impair the ABER performance of NLOS UVC systems.