H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/185 (2006.01) H04B 7/005 (2006.01)
Patent
CA 2350999
A comprehensive system and method for uplink power control in a satellite communication system is provided. Power leveling is used to determine a reference uplink transmission power level. That is, the power of uplink signals received by a satellite (140) from a terminal (110) is compared to a power threshold. The transmission power of the uplink signals is then adjusted up or down based on the comparison of the received power with the threshold. Preferably, the power comparison is accomplished using synch bursts. Error leveling is then used to determine a traffic burst uplink transmission power level. That is, once the terminal (110) begins transmitting data using a channel (103), the error rate of the data in the channel (103) is compared to a threshold error rate and the transmission power of the uplink signals is then adjusted up or down based on the comparison. Threshold leveling is then used to evaluate the power threshold. That is, periodically, the reference uplink transmission power level and the traffic burst uplink transmission power level of the channels of the terminals (1101-1105) are compared. The power threshold is then controlled based on the comparison of the reference and traffic burst uplink transmission power levels.
Nivens Dennis A.
Wright David A.
Gowling Lafleur Henderson Llp
Northrop Grumman Corporation
Trw Inc.
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