Title :
Performance of Mixed RF/FSO With Variable Gain over Generalized Atmospheric Turbulence Channels
Author :
Liang Yang ; Hasna, Mazen O. ; Xiqi Gao
Author_Institution :
Dept. of Commun. Eng., Guangdong Univ. of Technol., Guangzhou, China
Abstract :
In this paper, we consider a free-space optical (FSO) communication scheme with the help of a variable gain relay where the links from the source to the relay are radio-frequency (RF) links while the links between the relay and the destination are FSO links with M-distribution. To mitigate the effects of multipath fading and atmospheric turbulence, we apply transmit diversity at the source and selection combining (SC) at the destination, while the relay is only equipped with single RF receive antenna for receiving signal and one aperture for relaying the information. With this setup, we first derive expressions for the outage probability, bit-error rate, and the average capacity. We further investigate the effect of pointing errors on the system performance.
Keywords :
atmospheric turbulence; diversity reception; error statistics; fading channels; multipath channels; optical links; probability; relay networks (telecommunication); average capacity; bit-error rate; free-space optical communication scheme; generalized atmospheric turbulence channels; mixed RF/FSO; multipath fading; outage probability; radio-frequency links; selection combining; single RF receive antenna; transmit diversity; variable gain relay; Adaptive optics; Apertures; Fading; Optical fiber communication; Radio frequency; Relays; Signal to noise ratio; $mathcal{M}$-distribution; Atmospheric turbulence; M-distribution; free-space optical communication; pointing error; relay;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
DOI :
10.1109/JSAC.2015.2432471
