Combined closed loop/open loop power control in a time division duplex communication system
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United States of America Patent
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Jul 29, 2003
Grant Date -
N/A
app pub date -
Mar 21, 2000
filing date -
Mar 21, 2000
priority date (Note) -
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Abstract
Combined closed loop/open loop power control controls transmission power levels in a spread spectrum time division duplex communication station. The first station transmits power commands based on in part a reception quality of the received communications. The first station transmits a first communication having transmission power commands based on in part a reception quality of the received communications. The first station transmits a first communication having a transmission power level in a first time slot. The second station received the first communication and the power commands. A power level of the first communication as received is measured. A path loss estimate is determined based on in part the measured received first communication power level and the first communication transmission power level. The second station transmits a first communication to the first station in a first time slot. The second communication transmission power level is set based on in part the path loss estimate weighted by a factor and power commands. The factor is a function of a time separation of the first and second time slots.
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