End-to-end transmission techniques for a processing...

Details End-to-end transmission techniques for a processing... End-to-end transmission techniques for a processing...

H - Electricity

04

L

H04L 1/22 (2006.01) H04B 7/185 (2006.01)

Patent

CA 2317887

Coordination of processing satellite uplink transmission and downlink transmission is achieved by an uplink encoder (418) and uplink modulator (420) which incorporate an adjustable IF amplifier (417) at a ground terminal (400). Information about data traffic transmission errors detected in a satellite (100) is formed into ATM traffic report cells by a cell former (157). The traffic report cells are sent on the downlink to the ground terminal. The traffic report cells are used to adjust the power level of the IF amplifier for the particular channel and slot for which errors were detected. Satellite 100 also detects the time of arrival of a synchronization burst signal at the satellite and estimates the received energy in the burst signal. Another cell former (144) forms ATM synchronization report cells, including information about the arrival time and energy, which are sent on the downlink to the ground terminal. The synchronization report cells are used to adjust the power of the IF amplifier for all channels and to adjust the time at which frames are transmitted on the uplink.

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