On the BER performance of FSO links with multiple receivers and spatial jitter over gamma-gamma or exponential turbulence channels

Ninos, Michalis P.; Nistazakis, Hector E.; Tombras, George S.

doi:10.1016/j.ijleo.2017.03.009

Cited by 33 publications

(24 citation statements)

References 45 publications

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“…The total simultaneous influence of the chromatic dispersion, time jitter and water turbulence effects on the performance of the UOWC link can be estimated, from (3) and (14), through the extraction of the corresponding joint PDF as [37,54,55]:…”

Section: The Joint Influence Of Gvd Time Jitter and Turbulencementioning

confidence: 99%

Time Jitter, Turbulence and Chromatic Dispersion in Underwater Optical Wireless Links

et al. 2019

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The performance of an underwater optical wireless communication link is investigated by taking into account—for the first time and to the best of our knowledge—the simultaneous influence of the chromatic dispersion, the time jitter and the turbulence effects, by assuming chirped longitudinal Gaussian pulse propagation as information carriers. The estimation procedure is presented and a novel probability density function is extracted in order to describe the irradiance fluctuations at the receiver side. Furthermore, the availability of the link is investigated by means of its probability of fade and various numerical results are presented using typical parameters for the underwater optical wireless communication systems.

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Section: The Joint Influence Of Gvd Time Jitter and Turbulencementioning

confidence: 99%

Time Jitter, Turbulence and Chromatic Dispersion in Underwater Optical Wireless Links

et al. 2019

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“…denotes the Meijer function, (Equation (5) in [32]) that is a standard built in function which can be evaluated with most of the well known mathematical software packages and can be transformed to the familiar hypergeometric functions [32]. Similarly, for saturated turbulence conditions, by using (5), Equation (11) in [32] and by following the same analysis performed in [7], we obtain that (9) can be written according to [33], as…”

Section: Joint Turbulence and Pointing Errors Effectsmentioning

confidence: 99%

“…where P denotes the average signal power at the receiver's side and E[I {i,j} ] is the corresponding expected normalized irradiance value, [15,17,22] which for both G-G and NE turbulence distributions is given according to [33][34][35], as:…”

Section: Joint Turbulence and Pointing Errors Effectsmentioning

confidence: 99%

Mixed Topology of DF Relayed Terrestrial Optical Wireless Links with Generalized Pointing Errors over Turbulence Channels

et al. 2018

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This study investigated the outage performance of a terrestrial FSO communication system that uses mixed series and parallel decode-and-forward (DF) relay-assisted (i.e., cooperative diversity) configurations, taking into account the influence of both atmospheric turbulence and pointing error effects. Turbulence-induced optical signal fading is modeled by gamma-gamma or the negative exponential distribution for weak to strong and saturated turbulence conditions, respectively. Additionally, weak to strong non-zero boresight misalignment-induced optical signal fading is modeled by the generalized Beckmann distribution. Under these conditions, an outage analysis of the examined FSO system is performed, in terms of both outage probability and mean outage duration metrics. Thus, fairly accurate closed-form mathematical expressions for both performance metrics are derived, while their corresponding analytical results demonstrate concrete performance and availability improvements for the total FSO system, especially when the number of the connected in parallel DF relays increases. Moreover, the obtained results are verified through the corresponding simulation results.

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“…Many statistical distribution models have been proposed for the description of the intensity fluctuations which arise from the scintillation effect. Each properly describes the scintillation effect caused by different turbulence strength, i.e., weak, moderate or strong, [12,[14][15][16][17]. More precisely, lognormal and gamma statistical distributions are useful for describing the scintillations caused by weak turbulence, while GG, Malaga (M) and I-K are commonly used for a range from weak to strong turbulence conditions; finally, K and NE are suitable for strong and saturated conditions, respectively, [11,12,14,[18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Serial DF Relayed FSO Links over Mixture Gamma Turbulence Channels and Nonzero Boresight Spatial Jitter

et al. 2019

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Over the past few years, terrestrial free space optical (FSO) communication systems have demonstrated increasing research and commercial interest. However, due the signal’s propagation path, the operation of FSO links depends strongly on atmospheric conditions and related phenomena. One such significant phenomenon is the scintillation caused by atmospheric turbulence effects; in order to address the significant performance degradation that this causes, several statistical models have been proposed. Here, turbulence-induced fading of the received optical signal is investigated through the recently presented mixture Gamma distribution, which accurately describes the irradiance fluctuations at the receiver’s input of the FSO link. Additionally, at the same time, it significantly reduces the mathematical complexity of the expressions used for the description of composite channels with turbulence along with nonzero boresight pointing error-induced fading. In order to counterbalance the performance mitigation due to these effects, serial decode-and-forward relays are employed, and the performance of the system is estimated through derived mathematical expressions.

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On the BER performance of FSO links with multiple receivers and spatial jitter over gamma-gamma or exponential turbulence channels

Cited by 33 publications

References 45 publications

Time Jitter, Turbulence and Chromatic Dispersion in Underwater Optical Wireless Links

Time Jitter, Turbulence and Chromatic Dispersion in Underwater Optical Wireless Links

Mixed Topology of DF Relayed Terrestrial Optical Wireless Links with Generalized Pointing Errors over Turbulence Channels

Serial DF Relayed FSO Links over Mixture Gamma Turbulence Channels and Nonzero Boresight Spatial Jitter

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