BASE STATION DEVICE, MOBILE COMMUNICATION SYSTEM, TRANSMISSION BEAM CONTROL METHOD, AND COMPUTER-READABLE MEDIUM

摘要

In one embodiment of the present invention, a base station (1) is configured to process a plurality of information symbols, said information symbols being generated by precoding on the basis of a codebook, in order to generate a plurality of time region signals that are associated with a plurality of antennas belonging to an antenna array (16). In addition, the base station (1) comprises an adjustment unit (14) and a control unit (17). The adjustment unit (14) adjusts the beam emission angle (theta) of directional beams (B1-B4) that are formed from the plurality of time region signals on the basis of the correlation among the antennas in the antenna array (16). The control unit (17) controls calibration for determining the beam emission angle (theta) of the directional beams (B1-B4) as a first beam emission angle. The calibration includes determination of the first beam emission angle on the basis of the downlink communication quality of an adjacent cell (200), said downlink communication quality having been measured while scanning the beam emission angle during transmission of a directional beam.