Multi-Input Multi-Output Free Space Optical Satellite Communication Links

Weerackody, V.; Hammons, A.R.; Tebben, D.J.

doi:10.1109/ciss.2007.4298392

Cited by 4 publications

(5 citation statements)

References 10 publications

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“…Substituting (18) into (15), the covariance becomes a function of the only independent variable t, that is, B I (t).…”

Section: Theoretical Background For Data Analysismentioning

confidence: 99%

“…The measured scintillation index value was used to generate the samples with correct statistical distributions in accordance to the experimental turbulence condition. The theoretical temporal covariance B I (t) [27] obtained by combining (15) and (18)was then employed to temporally correlate the samples. Starting from the data collected during the measurements, the correct transverse wind speed value V T (see (18)) was also determined, for each case, as a fitting parameter, in order to achieve a close matching between the measured and predicted temporal covariances.…”

Section: Comparison With the Theoretical Time-correlated Channel Modelmentioning

confidence: 99%

“…In order to reduce these impairments, several techniques have been reported in the literature. Among hardware solutions, aperture averaging [13,14] and spatial diversitysuch as multiple-input multiple-output (MIMO) based FSO systems [15,16] are mostly employed to improve the link performance under different atmospheric turbulence regimes.…”

Section: Introductionmentioning

confidence: 99%

“…In order to reduce these impairments, several techniques have been reported in the literature. Among hardware solutions, aperture averaging [13,14] and spatial diversity -such as multiple-input multiple-output (MIMO) based FSO systems [15,16] -are mostly employed to improve the link performance under different atmospheric turbulence regimes. Instead, software solutions mainly consist of a retransmission protocol or suitable encoding techniques, such as the recently developed rateless codes [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Indoor free space optics link under the weak turbulence regime: measurements and model validation

Pernice¹,

Andò²,

Cardinale³

et al. 2015

IET Communications

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Institution of Engineering and Technology (IET)Pernice Abstract:In this paper, we present the measurements performed on a free space optics (FSO) communications link using an indoor atmospheric chamber. In particular, we have generated several different optical turbulence conditions, demonstrating how even the weak turbulence regime can strongly affect the FSO link performance. We have carried out an in-depth analysis of the data collected during the measurements, and calculated the turbulence strength (i.e. scintillation index and Rytov variance) and the important performance metrics (i.e., the Q-factor and bit error rate) to evaluate the FSO link quality.Moreover, we have tested, for the first time, an appositely developed temporally-correlated Gamma-Gamma channel model to generate the temporal irradiance fluctuations observed at the receiver. This has been accomplished by using a complete analysis tool that enables us to fully simulate the experimental FSO link. Finally, we compare the generated time-series with the collected experimental data, showing a good agreement and thus proving the effectiveness of our model.

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“…Substituting (18) into (15), the covariance becomes a function of the only independent variable t, that is, B I (t).…”

Section: Theoretical Background For Data Analysismentioning

confidence: 99%

Section: Comparison With the Theoretical Time-correlated Channel Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Indoor free space optics link under the weak turbulence regime: measurements and model validation

Pernice¹,

Andò²,

Cardinale³

et al. 2015

IET Communications

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show abstract

“…A number of solutions, both hardware -such as the spatial diversity, e.g., multiple-input multiple-output (MIMO) FSO systems [1,13,14], adaptive optics [15], and large receiver aperture sizes [1] -and software (i.e. error control coding, channel coding) have been reported in the literature to mitigate atmospheric turbulence-induced fading in intensity modulation/direct detection (IM/DD) FSO links.…”

Section: Introductionmentioning

confidence: 99%

Error mitigation using RaptorQ codes in an experimental indoor free space optical link under the influence of turbulence

et al. 2015

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Abstract:In Free space optical (FSO) communications, several factors can strongly affect the link quality. Among them, one of the most important impairment that can degrade the FSO link quality and its reliability -even under the clear sky conditions -consists of optical turbulence. In this work, we investigate the generation of both weak and moderate turbulence regimes in an indoor environment to assess the FSO link quality. In particular, we show that, due to the presence of the turbulence, the link experiences both erasure errors and packet losses during transmission, and also compare the experimental statistical distribution of samples with the predicted Gamma-Gamma model. Furthermore, we demonstrate that the application of the RaptorQ codes noticeably improves the link quality decreasing the packet error rate (PER) by about an order of magnitude, also offering -in certain cases -an error free transmission with a PER of ~ 10 -2 at Rytov variance value of 0.5. The results show that the recovery rate increases with the redundancy, the packet length and the number of source packets, while decreases with increasing data rates.

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Fundamental investigation of extending 4G-LTE signal over MMF/SMF-FSO under controlled turbulence conditions

Al-Musawi

Cseh

Bohata

et al. 2016

2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)

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Multi-Input Multi-Output Free Space Optical Satellite Communication Links

Cited by 4 publications

References 10 publications

Indoor free space optics link under the weak turbulence regime: measurements and model validation

Indoor free space optics link under the weak turbulence regime: measurements and model validation

Error mitigation using RaptorQ codes in an experimental indoor free space optical link under the influence of turbulence

Fundamental investigation of extending 4G-LTE signal over MMF/SMF-FSO under controlled turbulence conditions

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