Patent ID: 6940840

Claim:
An apparatus for adaptive reverse control of power (APC) from a subscriber unit (SU) to a base station (BS), comprising: said subscriber unit for sending to said base station, using spread-spectrum modulation, a SU-spreading code on a reverse channel; said base station unit for despreading the SU-spreading code on the reverse channel as a despread signal, for determining a first power level P d from the despread signal, whereby the first power level P d includes the power of the despread signal plus noise, for determining a second power level P N , whereby the second power level includes the power of the despread noise, for determining a first error signal e 1 , from the first power level P d , the second power level P N , and a required signal-to-noise ratio SNR REQ for service type, for determining a second error signal e 2 , from a measure of total received power P rt and an automatic gain control (AGC) set point P o , for forming a combined error signal from the first error signal e 1 , the second error signal e 2 , a first weight a 1 and a second weight a 2 , with the first weight a 1 and the second weight a 2 chosen for each service type, for hard limiting the combined error signal to form a single APC bit, and for transmitting the APC bit to the subscriber unit; and said subscriber unit for receiving the APC bit and, in response to the APC bit, for adjusting transmitter power to the base station.