Wireless communication apparatus with calibration

A wireless communication apparatus comprising:

• a plurality of receivers respectively corresponding to a plurality of antennas;
• a control unit configured to release, when an Uplink (UL) calibration is executed, respective connection between the antennas and the receivers;
• a calibration transmitter to transmit, when the respective connection is released, a UL calibration signal that is received by and passes through each receiver without passing through the antennas, and that results in information being provided to the control unit, each receiver being in an ON state;
• and
• a determination unit to acquire a quality value of each of a plurality of reception signals respectively received by the plurality of receivers, and calculates, for each of a plurality of time sections, a moving average value of the quality value, wherein
• the determination unit determines that a transition in time of the quality value satisfies a first condition indicating an abnormal interference level when the moving average value increases by an amount equal to or more than a first threshold in a predetermined number of successive time sections,
• the control unit determines at least one of a calibration weight to be applied to each receiver based on the reception signals and a UL channel estimation value between the antennas and a plurality of user equipments, and
• the control unit updates, for each receiver in which the transition in time of the quality value satisfies the first condition, the calibration weight and the UL channel estimation value to the calibration weight and the UL channel estimation value determined in the time section immediately before the time section in which the moving average value increased by the amount equal to or more than the first threshold.