A wireless base station that includes: a transmitter that employs a plurality of antenna elements to form a beam in each of a plurality of transmission directions and transmit a reference signal; a receiver that receives a value representing reception quality of the reference signal for a user device that has received the reference signal; a memory; and a processor connected to the memory, the processor being configured to employ an indicator value, representing reception quality for a user device group computed from values received by the receiver that represent reception quality for each of a plurality of user devices, in order to select a combination of beams to employ in user data transmission from the plurality of beams transmitted by the transmitter.