Electronic – How is mobile communication(between pilot and ATC ) made possible from airplanes

communicationradio

I have heard that communication using mobile phones begins to degrade when used on a vehicle moving at speeds above 200 km/hr due to doppler effect as described here (p-22). How is this limitation overcome in airplanes. What is the specific technology used to overcome this limitation.

Best Answer

http://computer.howstuffworks.com/in-flight-mobile-phone-services1.htm

Basically an extra "cell" is created on the plane, and because the base station is moving at the same speed as the mobile phone, there is no doppler effect. Backhaul is done over satellite, which is perpendicular to the plane's direction of travel and therefore does not suffer from doppler either.

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