Patent ID: 7797013

Claim:
A method for controlling radio transmissions to multiple radio terminals, comprising: determining channel qualities of different radio channels associated with the radio terminals; grouping first signals for a first number of radio terminals associated with a channel quality equal to or better than a predetermined level; grouping second signals for a second number of radio terminals associated with a channel quality less than the predetermined level; scheduling the first signals to be amplified by a power amplifier during a first time period; scheduling the second signals to be amplified by the power amplifier during a second time period; during the first time period, the power amplifier amplifying the first signals at a first power level and transmitting a first composite output signal; and during the second time period, the power amplifier amplifying the second signals at a second power level higher than the first power level and transmitting a second composite output signal, wherein the first power level is a backed-off mean power level that reduces a probability of clipping as compared to a probability of clipping at the second power level which is also a mean power level.