Aeronautical Air-Ground Data Link Communications by Mohamed Slim Ben Mahmoud, Christophe Guerber, Nicolas

By Mohamed Slim Ben Mahmoud, Christophe Guerber, Nicolas Larrieu, Alain Pirovano, Jos? Radzik

This ebook offers with air-ground aeronautical communications. the most objective is to provide the reader a survey of the presently deployed, rising and destiny communications structures devoted to electronic facts communications among the airplane and the floor, specifically the information hyperlink. these conversation structures convey particular houses rather to these frequent for terrestrial communications. during this ebook, the procedure architectures are extra particularly thought of from the entry to the appliance layers as radio and actual functionalities have already been addressed intimately in others books.

The first half is an creation to aeronautical communications, their particular techniques, houses, requisites and terminology. the second one half offers the presently used structures for air floor communications in continental and oceanic sector. The 3rd half enlightens the reader at the rising and destiny conversation platforms and a few best learn tasks thinking about this scope. eventually, ahead of the belief, the fourth half provides numerous major demanding situations and learn instructions at the moment less than investigation.

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The Iridium system will be an opportunity to discuss the features of regenerative satellites. The aviation segment corresponds to stations implemented on aircraft. These stations, called AES for Aeronautical Earth Station, provide an interface between the satellite link and networks embedded in the plane. 12 shows how the integration is performed satellite links in the ATN architecture. It should be noted the direct link between GHGs and AES, thus confirming the hypothesis of a transparent satellite.

38 GHz band. Each satellite maintains four crosslinks to adjacent satellites. All communications are handled by the two gateways in Arizona and Hawaii due to Ka steerable feeder links. 4 kbps, direct Internet data with a throughput rate of up to 10 kbps and short burst data (SBD) service. A new satellite constellation, Iridium Next, will take over existing satellites with greatly increased capacities. Throughputs greater than 1 Mbit/s are advertised for L-band terminals, 8 Mbit/s for Ka-band terminals.

For example, in case of S-ALOHA, G = 1 means that on average, a packet is transmitted in each time slot. Some slots have several packets that collide, other slots are empty. e. without collision, and dividing by the observation time. 1 means that 10% of the time slots are used to transmit a useful data packet. 7. ALOHA and S-ALOHA performances Current Communication Radio Systems for Data Link 25 The previous trace provides several lessons. In addition to the highest available performance, it helps us to understand that random access techniques present a risk of instability.

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