Wireless communication device and beam control method

A beam control method executed by a wireless communication device including a plurality of subarrays each including a plurality of antenna elements and an analog circuit configured to perform a given analog process on signals to be transmitted from the antenna elements or signals that are received by the antenna elements, the beam control method comprising:

• estimating direction of arrivals from which signals transmitted from a plurality of terminals come, using a processor;
• calculating maps based on trigonometric functions of angles representing the estimated direction of arrivals, using the processor;
• generating a plurality of groups to which the terminals belong based on the calculated maps, using the processor;
• assigning, to each of the groups, a combination of subarrays to generate directional beams that do not interfere with each other, using the processor, the combination of subarrays being included in the subarrays;
• determining weighting coefficients to generate directional beams in directions of the terminals which belongs to each group by using the combination of subarrays assigned to each of the groups, using the processor;
• and
• communicating, by the combination of subarrays and other subarrays, with the terminals simultaneously using the directional beams.