Patent ID: 8064945
Filing Date: 2011-11-22
Classification: H04B,H04W

Abstract:
1. A base station that has a plurality of antennas and transmits a modulated signal for each independent channel from each antenna of said plurality of antennas, said base station comprising: a plurality of modulators that form a modulated signal independently for each antenna of said plurality of antennas; a receiver that receives feedback information from a communication terminal that receives said modulated signal; and a transmission power controller that controls a transmission power of each transmission channel independently for each transmission channel by controlling outputs of said plurality of modulators independently without combining the outputs, based on said feedback information of a corresponding transmission channel, and modifies, independently for said each antenna, the transmission power of the modulated signal transmitted from said each antenna, wherein: said feedback information includes information indicating channel fluctuation value of each modulated signal between said each antenna of said base station and each antenna of said communication terminal, and information indicating received field strength of said each antenna of said communication terminal; and said transmission power controller controls said transmission power of said each transmission channel independently for each channel, based on said channel fluctuation value and said received field strength.