Performance analysis of FSO system with spatial diversity using two-point Padé approximation

Singh, Harmeet

doi:10.1007/s11082-021-03247-6

Cited by 5 publications

(2 citation statements)

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“…where T is the average air temperature, W is the average relative humidity, S is the average wind speed from the local weather station, and w is a scaling coefficient. The average values of 𝐶 using [67] were 3 × 10 −15 on a clear day, 1 × 10 A probability distribution function of the 𝐶 values from the experiment could be computed to determine if this adhered to relevant channel probability distribution functions for FSO spatial mode diversity and FSO aerial communications such as Malaga, log normal, Gamma-Gamma, Nagakami, and others [68][69][70][71][72]. Log normal and Gamma-Gamma channel models are considered as special cases of the Malaga channel model, for weak turbulence and moderate-strong turbulence, respectively [72].…”

Section: Resultsmentioning

confidence: 99%

Unmanned Aircraft Systems with Autonomous Navigation

2023

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Section: Resultsmentioning

confidence: 99%

Unmanned Aircraft Systems with Autonomous Navigation

2023

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“…A probability distribution function of the C 2 n values from the experiment could be computed to determine if this adhered to relevant channel probability distribution functions for FSO spatial mode diversity and FSO aerial communications such as Malaga, log normal, Gamma-Gamma, Nagakami, and others [68][69][70][71][72]. Log normal and Gamma-Gamma channel models are considered as special cases of the Malaga channel model, for weak turbulence and moderate-strong turbulence, respectively [72].…”

Section: Resultsmentioning

confidence: 99%

Post-Flood UAV-Based Free Space Optics Recovery Communications with Spatial Mode Diversity

et al. 2022

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The deployment of unmanned aerial vehicles (UAVs) for free space optical communications is an attractive solution for forwarding the vital health information of victims from a flood-stricken area to neighboring ground base stations during rescue operations. A critical challenge to this is maintaining an acceptable signal quality between the ground base station and UAV-based free space optics relay. This is largely unattainable due to rapid UAV propeller and body movements, which result in fluctuations in the beam alignment and frequent link failures. To address this issue, linearly polarized Laguerre–Gaussian modes were leveraged for spatial mode diversity to prevent link failures over a 400 m link. Spatial mode diversity successfully improved the bit error rate by 38% to 55%. This was due to a 10% to 19% increase in the predominant mode power from spatial mode diversity. The time-varying channel matrix indicated the presence of nonlinear deterministic chaos. This opens up new possibilities for research on state-space reconstruction of the channel matrix.

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