Aeronautical satellite TV repeater

摘要

A repeater for digital satellite television broadcasts wherein the repeater receives digital television signals broadcast from a satellite using one or more antennas mounted on the outside of an aircraft; the repeater corrects for Doppler frequency offset, resulting from the aircraft and/or satellite motion, prior to re-transtnission of the broadcast into the interior of the airframe. This correction is a shift of the received signal frequency; the repeater re-transmits the broadcast, in a modulated and coded format, into the inside of an aircraft, the re-transmitted signal is received by multiple users inside the aircraft; the repeated signal is in a modulated and/or coded form and consequently the multiple users of the signal must each have a receiver capable of performing the required demodulation and/or decoding.