Serial Free-Space Optical Relaying Communications Over Gamma-Gamma Atmospheric Turbulence Channels

Experimental Investigation of All-Optical Relay-Assisted 10 Gb/s FSO Link Over the Atmospheric Turbulence Channel

“…(ℎ 2 ) = 2( ) Using (17) in the same way to derive (ℎ), we obtain the PDF of the equivalent SNR at the destination as follow: …”

“…Using (17) and the concept of transformation of RVs, we can derive the PDF of ℎ in Meijer-G function as: ) .…”

Multihop Relaying Over IM/DD FSO Systems With Pointing Errors

“…In this paper, we extend the work presented in [12] to study the performance of a multihop FSO system employing CSI-assisted and fixed-gain relays over Gamma-Gamma turbulence-induced fading with pointing error impairments under IM/DD technique. Using the well-known inequality between harmonic and geometric means of positive random variables (RVs) [13], we derive novel closed-form results for the probability density function (PDF), and the cumulative distribution function (CDF) of the end-to-end signal-to-noise ratio (SNR) in terms of the Fox's H function.…”

“…The performance of the FSO multihop system using CSI-assisted and fixed-gain relays over Gamma-Gamma turbulence under heterodyne detection technique with pointing errors has been analysed in [11]. In [12], the end-to-end performance of the multihop FSO system using channel-state-information (CSI)-assisted relays and fixed-gain relays over Gamma-Gamma turbulence under intensity modulation with direct detection (IM/DD) technique has been examined. However, the performance study carried out in [12] does not include the effect of the pointing error.…”

“…In [12], the end-to-end performance of the multihop FSO system using channel-state-information (CSI)-assisted relays and fixed-gain relays over Gamma-Gamma turbulence under intensity modulation with direct detection (IM/DD) technique has been examined. However, the performance study carried out in [12] does not include the effect of the pointing error. Also, the ergodic capacity, being an important performance metric of primary concern in the design of FSO systems, is not studied.…”