DIVERSITY METHOD AND BASE-STATION FOR CONTROLLING POWER ALLOCATION OF TRANSMIT ANTENNA IN MOBILE COMMUNICATION SYSTEM

摘要

A diversity transmission method for controlling power assignment of a transmission antenna in a mobile communication system and a base station transmitter are provided to receive feedback information including information of an antenna selected from a mobile terminal for signals transmitted to plural transmission antennas, increase a power assignment ratio of an antenna which is selected, decrease a power assignment ratio of an antenna which is not selected, and transmit the signals to the mobile terminal, thereby stably providing a diversity gain for reception performance improvement at a slow moving speed and a fast moving speed. A method for transmitting diversity for controlling power of a transmission antenna comprises the following steps of: receiving feedback information which includes information of the antenna with the best channel state from a mobile terminal(S330); increasing a power assignment ratio of the antenna selected by the feedback information as much as a certain quantity and decreasing the power assignment ratio of an antenna, which is not selected, as much as a certain quantity(S350,S360); and transmitting a signal to the mobile terminal by using power of which the assignment ratio is controlled(S370).