Route diversity analyses for free-space optical wireless links within turbulent scenarios

Abstract

Free-Space Optical (FSO) communications link performance is highly affected when propagating through the time-spatially variable turbulent environment. In order to improve signal reception, several mitigation techniques have been proposed and analytically investigated. This paper presents experimental results for the route diversity technique evaluations for a specific case when several diversity links intersects a common turbulent area and concurrently each passing regions with different turbulence flows.

Experimental verification of an all-optical dual-hop 10 Gbit/s free-space optics link under turbulence regimes

“…We aim to address this by studying an all-optical two-hop FSO system in a laboratory environment. This Letter considerably extends our previous experiments devoted to routing techniques and ad hoc network diversity segments [2] where only parallel OWC links were characterized.As in radio frequency-based systems, FSO link performance is also affected by the atmospheric conditions including turbulence [3]. In the turbulence channel, the variation in the received optical signal power is typically expressed by the Rytov variance, which depends on the refractive index structure parameter C 2 n .…”

Multiuser Relaying over Mixed RF/FSO Links

“…Recall that p 0 , p n and φ have already been defined in (9 and after some straightforward manipulations, the closed-form PDF at the ith layer of the rate efficient approach is obtained in (8). APPENDIX C DERIVATION OF (14) Following the same methodology as presented in Appendix A, but using (3) instead of (4), the derivations of Δ 1 and Δ 2 can be easily obtained after some straightforward manipulations. Also, keeping in mind Remark 4 and based on (3), we have that…”

“…Moreover, features such as flexibility, rapid deployment time, high security and robustness to RF interference have rendered FSO systems appealing for disaster recovery and military applications [6], [7]. We recall that both theoretical [8]- [11] and empirical research efforts [12]- [14] have manifested some of these useful aspects of the FSO systems.…”

SER performance analysis of MPPM FSO system with three decision thresholds over exponentiated Weibull fading channels

“…In these years, free-space optical (FSO) communication has received increasing attentions for its applications in high speed wireless links as a cost-effective, license-free, high security and high bandwidth access technology compared with traditional radio frequency (RF) communication [1,2]. However, the performance of FSO system will be severely affected by the scintillation due to the intensity fluctuations at the received signal by atmospheric turbulence [3,4].…”