Patent ID: 7483493

Claim:
Method for power adaptation in a multicarrier code division multiple access communication system in which a plurality of mobile stations communicate with at least one base station, each mobile station including an adaptive transmitter that includes a plurality of controllable gain amplifiers, the at least one base station including a plurality of adaptive receivers, each receiver corresponding to one of the plurality of mobile stations and including a plurality of controllable gain amplifiers, the method comprising the steps of: receiving signals from the mobile stations; estimating channel power gain for each mobile station in response to the received mobile station signals, where the channel power gain G k,n is for an n th subcarrier of mobile station k, for k=1, 2, . . . , K and n=1, 2, . . . , N; ordering received signals from the mobile stations on a decreasing order basis for the corresponding estimated channel power gain from the mobile station associated with a highest channel gain to the mobile station associated with a lowest channel gain; determining both a plurality of power amplifier gain levels α k,n t for the controllable gain amplifiers in the adaptive transmitter associated with each mobile station and a plurality of power amplifier gain levels β k,n t for the controllable gain amplifiers in the adaptive receiver associated with each mobile station in response to the ordered channel power gains, wherein the adaptive transmitter power amplifier gain levels and the adaptive receiver power amplifier gain levels are dynamically adapted to the estimated channel power gains for each symbol from the mobile stations in the time domain for distributing available transmission power over all N subcarriers to maintain a received signal strength for signals received at the base station at a predetermined level.