RT Journal Article
T1 Secure communication for FSO links in the presence of eavesdropper with generic location and orientation
A1 Boluda-Ruiz, Rubén
A1 Castillo-Vázquez, Beatriz
A1 García-Zambrana, Antonio
A1 Qaraqe, Khalid
K1 Comunicaciones ópticas
K1 Turbulencia atmosférica
AB When the beam waist at the receiver is significantly larger than the receiver size, free-space optical (FSO) links may be vulnerable to some optical tapping risks at the physical layer. In this paper, we conduct a new framework for the analysis of the secrecy performance in terms of the secrecy outage probability (SOP) of FSO systems affected by gamma-gamma (GG) turbulence induced fading channels with pointing errors. As a key feature, we evaluate the SOP in the presence of an external eavesdropper with generic location and orientation. For that reason, a new misalignment error model is proposed to consider a non-orthogonal optical beam with respect to the photodetector plane at the eavesdropper’s receiver, where the effective area is determined by a rotated ellipse. New approximate and asymptotic solutions at high signal-to-noise-ratio (SNR) for the secrecy performance are obtained in closed-form, which are verified by exact Monte Carlo simulations. By using the developed expressions, we analyze in greater detail some effects such as the SNR of the eavesdropper’s channel, the normalized beamwidth at the receiver-side, and the location and orientation of the eavesdropper on the secrecy performance for different turbulence conditions.
PB Optica Publishing Group
YR 2019
FD 2019
LK https://hdl.handle.net/10630/32927
UL https://hdl.handle.net/10630/32927
LA eng
NO Rubén Boluda-Ruiz, Antonio García-Zambrana, Beatriz Castillo-Vázquez, and Khalid Qaraqe, "Secure communication for FSO links in the presence of eavesdropper with generic location and orientation," Opt. Express 27, 34211-34229 (2019) https://doi.org/10.1364/OE.27.034211
NO Qatar National Library (QNL); Ooredoo Research Sponsorship 2015; Texas A&M University at Qatar (TAMUQ) RRSG 2019.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026