Apparatus and method for adjusting a receive beam gain in wireless communication system

The present invention relates to a method that the mobile station adjusts a reception beam gain in a wireless communication system, comprising: estimating a received signal quality value by using a reference signal transmitted from the base station, channel quality indicator associated with the received signal quality value (CQI: Channel the data in the a quality Indicator) sent to the base station, and compared to a reference value that indicates the minimum received signal quality value required to successfully receive the data transmitted by the received signal quality value from the base station and, based on the result of the comparison and it adjusts the gain for the received beam to be used when receiving.