Satellite-based measurement for uplink power control and time synchronization

Abstract

A method for uplink power control and time synchronization in a satellite communications system that is achieved using satellite-based measurements of the uplink signal power and signal arrival time. Uplink signals transmitted from an originating terminal are received by a communications satellite which measures the received signal power and arrival time. The satellite transmits a downlink signal to the originating terminal containing information of the measured uplink signal power and arrival time. The originating terminal receives the downlink signal and transmits subsequent uplink signals with an uplink signal power and transmission timing based on the information transmitted by the satellite.

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