LOLA: a 40.000 km optical link between an aircraft and a geostationary satellite

Cazaubiel, Vincent; Planche, Gilles; Chorvalli, V.; Hors, Lenaic Le; Roy, Bernard; Giraud, Emmanuel; Vaillon, L.; Carre, Francois; Decourbey, Eric

doi:10.1117/12.2308161

Cited by 16 publications

(12 citation statements)

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“…The optical wireless communication (OWC) field has evolved from Fried's theoretical research to a technology that has been advantageous to several missions in the field of aerospace. Applications of OWC link systems have also extended to aircraft-to-GEO link and UAV-to-ground link configurations [13], [14]. New developments and research initiatives appear every year, and support the continuous growth of OWC technologies.…”

Section: Prior Workmentioning

confidence: 99%

Acquisition and Tracking Strategies for Satellite to Ground Optical Communication Systems

Liu¹

2021

Preprint

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Optical wireless communication (OWC) offers a promising alternative to radio frequency (RF) based communication because it can support the increased demand for bandwidth in modern networks. This thesis examined three strategies that could be implemented to improve or simplify the design of a ground and satellite optical communication link. The acquisition of a laser beam emitted from a space orbiting satellite was examined. Atmospheric conditions and how they affect beam refraction was modeled using beam geometry and the refractive properties of air. Simulation results indicate that a beam with a large zenith angle is refracted to a higher degree than a beam with a smaller zenith angle. Beam refraction of an emitted beam with zenith angles of 61º and 82º reached the Earth surface with a peak power of 1179 photons/bit and 305 photons/bit respectively. Initial orbit estimation methods were examined, and it was found that Gauss’ Angles Only method was able to predict the azimuth and elevation of a target satellite with an average error of 6.38e−1. Which were positive results, and indicated that the Gauss method would be useful for initial orbit determination of an emitting satellite. Finally, a Extended Kalman Filter (EKF) state estimator was designed to evaluate whether the use of a Kalman filter is suitable for orbit determination when only using the angular observations that are available at an optical groundstation. Results indicated that when measurement errors of ±0.3 degrees were introduced into the system, position error state estimates reached a maximum of 6.9 km and 0.013 km/s. When the EKF was given smaller measurement errors of ±0.1 degrees, the errors in the state estimates were found to be a maximum of 1.4 km and 0.002 km/s. The results from the simulation for the state estimator indicated that an EKF can be applied to track the motion of a target satellite

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Section: Prior Workmentioning

confidence: 99%

Acquisition and Tracking Strategies for Satellite to Ground Optical Communication Systems

Liu¹

2021

Preprint

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“…Free‐space optical (FSO) communications use the 850, 1300, and 1550 nm windows, and there are standard components available, as sources and detectors, which have been developed for fiber systems that can be readily used in FSO scenarios. Regarding the space qualification and usability, the 850 nm components possess the advantage in this regard as many demonstrations have been performed already, such as the intersatellite SILEX experiment, 16 the LOLA laser link, 17 and also ground to GEO experiment 18 . Also, communication systems for intersatellite links using the 1064 nm wavelength has been demonstrated in space, using the BPSK coherent laser communication terminal (LCT) built by the German company TESAT 19,20 …”

Section: Atmospheric Optical Channel Modelmentioning

confidence: 99%

Link budget assessment for GEO feeder links based on optical technology

Barrios

Dimitrov

Calvo

et al. 2020

Satell Commun Network

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Summary Nowadays, large geostationary orbit (GEO) satellites can offer capacities up to 260 Gbps. In the midterm, in order to cope with the forecasted traffic demand, multibeam high throughput satellite systems are already being deployed. Optical GEO feeder link technology may provide transmission data rates up to the order of several terabits per second by making use of wavelength division multiplexing schemes. This work identifies physical layer techniques that enable the transmission of DVB‐S2X RF modulated signals over optical carriers. The techniques reported here are the analog transparent (AT), digital transparent (DT), and the digital regenerative schemes, which require different satellite payload architectures. The effects of atmospheric turbulence over the traveling wave are addressed and discussed, along with a methodology to calculate the link budget in the feeder uplink channel. Link budget calculations for two different selected ground station locations are presented, for the both the AT and DT options. It is shown that for high altitude locations, the transmission using the AT and DT options works well. For midaltitude locations, typical 36 MHz signal are feasible, whereas for higher bandwidths, the DT option could work when an error correction code is used.

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“…Note that FSO link is not suitable for the aerialterrestrial communication because the line-of-sight (LoS) link between the aerial and the moving user could easily be blocked by obstacles, such as buildings and trees, etc. Unlike the aerial-terrestrial link, the LoS path always exists in satelliteaerial link, which is suitable for and in favor of the FSO transmission [14]. Meanwhile, the FSO can meet the highcapacity requirement of the satellite-aerial link to forward a high volume of data by the aerial platform to the satellite [15].…”

Section: Introductionmentioning

confidence: 99%

Robust Beamforming and Outage Performance of Uplink Multiuser Satellite-Aerial-Terrestrial Networks With Mixed RF-FSO Channels

Liu

Guo

et al. 2021

IEEE Photonics J.

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In this paper, we investigate the uplink transmission in a satellite-aerial-terrestrial network (SATN), where an aerial platform acts as an amplify-and-forward relay assisting the communication between multiple users and satellite. The users send messages to the aerial relay via radio frequency (RF) links, which are then forwarded to the satellite through a free-space optical (FSO) link. By assuming that the angle-of-arrival based imperfect channel state information of each user is known at the aerial platform, we propose a beamforming scheme to maximize the minimum average signal-to-interference-plus-noise ratio of the users. Due to the mathematical intractability, we design an iterative algorithm to obtain the optimal beamforming vector for the RF link. Furthermore, by considering that the FSO link experiences the Málaga fading with non-zero boresight pointing error and the RF links follow Nakagami-m fading, we derive an analytical expression for the outage probability of the considered SATN. Finally, computer simulation is conducted to validate our theoretical analysis. It is shown that the proposed algorithm can improve the system performance and robustness compared to existing works. Index Terms-Mixed RF-FSO channels, uplink transmission, outage probability, robust beamforming, satellite-aerialterrestrial network.

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LOLA: a 40.000 km optical link between an aircraft and a geostationary satellite

Cited by 16 publications

References 0 publications

Acquisition and Tracking Strategies for Satellite to Ground Optical Communication Systems

Acquisition and Tracking Strategies for Satellite to Ground Optical Communication Systems

Link budget assessment for GEO feeder links based on optical technology

Robust Beamforming and Outage Performance of Uplink Multiuser Satellite-Aerial-Terrestrial Networks With Mixed RF-FSO Channels

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