Abstract

Ultraviolet (UV) communication enables non-line-of-sight (NLOS) outdoor wireless connectivity and is particularly desirable for relaxing or eliminating pointing and tracking requirements of infrared links. In the current literature, atmospheric turbulence effects are typically ignored under the assumption of short link distances. In this paper, we consider a multi-hop UV system with decode-and-forward relaying and analyze its performance in the presence of log-normal (LN) turbulence. Specifically, we assume that each NLOS link consists of two line-of-sight (LOS) paths, each of which experience LN distributed fading. We first obtain a closed-form expression for the statistical distribution of turbulence-induced fading in NLOS UV links. Then we obtain the outage probability of the multi-hop UV system and quantify diversity gain as a function of system and channel parameters. Our results show that, with proper choice of these parameters, the turbulence variance for the NLOS link can be lower than that of the LOS link. This in turn yields higher-diversity gains. We also present numerical results to confirm the accuracy of our derivations and discuss the effect of several system parameters on the outage probability and diversity gain.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Optimal Relay Placement and Diversity Analysis of Relay-Assisted Free-Space Optical Communication Systems

Mohammadreza A. Kashani, Majid Safari, and Murat Uysal
J. Opt. Commun. Netw. 5(1) 37-47 (2013)

Outage and Diversity Analysis of Underlay Cognitive Mixed RF-FSO Cooperative Systems

Hamid Arezumand, Hossein Zamiri-Jafarian, and Ehsan Soleimani-Nasab
J. Opt. Commun. Netw. 9(10) 909-920 (2017)

Adaptive selective relaying in cooperative free-space optical systems over atmospheric turbulence and misalignment fading channels

Rubén Boluda-Ruiz, Antonio García-Zambrana, Carmen Castillo-Vázquez, and Beatriz Castillo-Vázquez
Opt. Express 22(13) 16629-16644 (2014)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (32)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription