Radio communication system, radio base station and radio communication method

A radio base station comprising:

• an antenna that has varying antenna configurations between at least two types of communication and that can transmit signals to all areas which the radio base station covers, in an antenna configuration to support at least one communication type 1;
• a resource allocation control section that allocates radio resources to a downlink signal including capacities of a user terminal and a signal type to match a communication type;
• a multiplexing section that multiplexes a reference signal on a resource block;
• a precoding weight generating section that generates a precoding weight which allows the antenna to form a number of beams to match the communication type;
• and
• a precoding multiplication section that multiplies a downlink signal to supply to the antenna by the precoding weight generated by the precoding weight generating section.

A radio communication method for allowing a user terminal to establish wireless connection and communicates with a radio base station, wherein:

• the radio base station has an antenna that has varying antenna configurations between at least two types of communication and that can transmit signals to all areas which the radio base station covers, in an antenna configuration to support at least one communication type 1;
• and
• the radio base station:
• allocates radio resources to a downlink signal including capacities of a user terminal and a signal type to match a communication type;
• multiplexes a reference signal on a resource block;
• generates a precoding weight which allows the antenna to form a number of beams to match the communication type;
• and
• multiplies a downlink signal to supply to the antenna by the generated precoding weight;
• and
• the user terminal:
• measures channel quality from the reference signal included in the downlink signal;
• generates feedback information pertaining to communication quality using the measured channel quality;
• and
• feeds back the generated feedback information to the radio base station via an uplink.