Method and apparatus for controlling transmission power in a potentially transmission gated or capped communication system
First Claim
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1. An apparatus for controlling the transmission energy of signals received from a remote transmitter, comprising:
- receiver for measuring an energy of the signals to produce an energy indication;
power control processor for generating a signal quality metric based on said measuring, generating closed loop power control commands in accordance with a comparison between the signal quality metric and a variable threshold, making a determination that the remote transmitter is not responding to the power control commands in a predetermined fashion, and suspending an updating of the variable threshold in accordance with said determination; and
a demodulator for demodulating the signals and measuring demodulated symbol energies from symbols residing in said signals, and providing said demodulated symbol energies to said power control processor, wherein said power control processor generates said signal quality metric based on said demodulated symbol energies.
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Abstract
A power control system for controlling the transmission power in a system wherein the transmission power may be gated or capped. The receiver employs a combination of closed loop and outer loop power control. The outer loop is frozen upon detection by the receiver that the signal has been capped or gated.
26 Citations
12 Claims
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1. An apparatus for controlling the transmission energy of signals received from a remote transmitter, comprising:
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receiver for measuring an energy of the signals to produce an energy indication;
power control processor for generating a signal quality metric based on said measuring, generating closed loop power control commands in accordance with a comparison between the signal quality metric and a variable threshold, making a determination that the remote transmitter is not responding to the power control commands in a predetermined fashion, and suspending an updating of the variable threshold in accordance with said determination; and
a demodulator for demodulating the signals and measuring demodulated symbol energies from symbols residing in said signals, and providing said demodulated symbol energies to said power control processor, wherein said power control processor generates said signal quality metric based on said demodulated symbol energies. - View Dependent Claims (2, 3, 4, 5)
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6. A method of controlling a transmission energy of signals received from a remote transmitter, comprising:
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measuring an energy of the signals to produce an energy indication;
generating a signal quality metric based on said measuring;
generating closed loop power control commands in accordance with a comparison between the signal quality metric and a variable threshold;
making a determination that the remote transmitter is not responding to the power control commands in a predetermined fashion;
suspending an updating of the variable threshold in accordance with said determination; and
demodulating symbols residing in the signals to produce symbol energies, wherein said generating said signal quality metric is based on said demodulated symbol energies. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification