초록 ▼

An apparatus and method for using a variable loop gain in a double-loop power control system to control the power of a forward link signal sent by a gateway to a user terminal to compensate for fading in a wireless communications system. In one embodiment the invention includes the steps of detectin

An apparatus and method for using a variable loop gain in a double-loop power control system to control the power of a forward link signal sent by a gateway to a user terminal to compensate for fading in a wireless communications system. In one embodiment the invention includes the steps of detecting fast fading in the forward link signal and informing the gateway of the fast fading; and at the gateway, reducing the loop gain of the power control loop when fast fading is indicated. In another embodiment, the invention includes the steps of, at the gateway, detecting fast fading in a reverse link signal received from the user terminal and reducing the loop gain of the power control loop when fast fading is indicated.

대표청구항 ▼

1. An apparatus comprising:means coupled to a first station for measuring a signal-to-noise ratio of a signal transmitted by a second station, said signal comprising a plurality of frames; means for adjusting a transmitted signal power of said signal as a function of a loop gain, said signal-to-nois

1. An apparatus comprising:means coupled to a first station for measuring a signal-to-noise ratio of a signal transmitted by a second station, said signal comprising a plurality of frames; means for adjusting a transmitted signal power of said signal as a function of a loop gain, said signal-to-noise ratio, and a signal-to-noise ratio threshold; means coupled to said first station for measuring a signal quality of the received signal; means for adjusting said signal-to-noise ratio threshold as a function of said signal quality and a signal quality threshold, comprising: means for increasing said signal-to-noise ratio threshold when a current frame has an error and a predetermined number of previous frames have no errors with a preselected minimum period between increases; and means for decreasing said signal-to-noise ratio threshold otherwise; means coupled to said first station for measuring a fading rate of said signal; and means for adjusting said loop gain as a function of said fading rate and a fading rate threshold.