Method and apparatus for controlling transmission energy in a communication system employing orthogonal transmit diversity
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United States of America Patent
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Jul 16, 2002
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N/A
app pub date -
Jun 28, 1999
filing date -
Jun 28, 1999
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Abstract
The present invention is a novel and improved method and apparatus for control transmission energy. The present invention describes a closed loop power control system that operates in conjunction with a transmitter using orthogonal transmit diversity. In a first embodiment of the present invention, the receiver evaluates the signal to noise ratio (SNR) of the two components of the signal. A weighted sum of these two components emphasizing the weaker of the two signals is generated and used in the generation of the power control commands. In a second embodiment of the present invention, the SNR of the two component signals are calculated and two separate power control commands are generated based on a corresponding one of the calculated SNR values.
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