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WCDMA geosynchronous satellite systems have been proposed for both military and commercial applications. In particular, the US Government is developing the Mobile User Objective System (MUOS) and plans to begin operations toward the end of the decade. As a WCDMA system, MUOS must employ user transmit power control. User power control begins in an open-loop state prior to the receipt of any feedback from the base station that improves the power control estimates. Power control attempts to minimize transmitted power while achieving the required QoS. Due to the longer path delays associated with a geosynchronous satellite, users will spend a longer time in an open-loop state.
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