A radio communication system comprising a plurality of radio base station apparatuses (20A, 20B) and a user terminal (10A, 10B) that is configured to communicate with the plurality of radio base station apparatuses (20A, 20B), wherein: the radio base station apparatuses (20A, 20B) comprise: a transmission section (201a, 201b) configured to transmit a reference signal for channel state measurement to the user terminal (10A, 10B); and a receiving section (201a, 201b) configured to receive channel state information generated in the user terminal (10A, 10B) based on the reference signal; and the user terminal (10A, 10B) comprises: a channel state information generating section configured to generate a plurality of pieces of channel state information, including channel state information from which interference from a coordinated cell is cancelled, when the plurality of radio base station apparatuses (20A, 20B) coordinate and perform transmission; and a transmission section configured to transmit the plurality of pieces of channel state information to at least a radio base station apparatus amongst said plurality of radio station apparatuses (20A, 20B); and wherein the radio base station apparatus further comprises a calculating section configured to calculate a Signal to Interference and Noise Ratio, SINR, from the plurality of pieces of channel state information received, characterized by that the calculation is based on transmission weights by which signals transmitted from the plurality of base station apparatuses are multiplied when the plurality of base station apparatuses coordinate and perform transmission, when coordinated multiple-point transmission is adopted. the radio base station apparatuses (20A, 20B) comprise: a transmission section (201a, 201b) configured to transmit a reference signal for channel state measurement to the user terminal (10A, 10B); and a receiving section (201a, 201b) configured to receive channel state information generated in the user terminal (10A, 10B) based on the reference signal; and a transmission section (201a, 201b) configured to transmit a reference signal for channel state measurement to the user terminal (10A, 10B); and a receiving section (201a, 201b) configured to receive channel state information generated in the user terminal (10A, 10B) based on the reference signal; and the user terminal (10A, 10B) comprises: a channel state information generating section configured to generate a plurality of pieces of channel state information, including channel state information from which interference from a coordinated cell is cancelled, when the plurality of radio base station apparatuses (20A, 20B) coordinate and perform transmission; and a transmission section configured to transmit the plurality of pieces of channel state information to at least a radio base station apparatus amongst said plurality of radio station apparatuses (20A, 20B); a channel state information generating section configured to generate a plurality of pieces of channel state information, including channel state information from which interference from a coordinated cell is cancelled, when the plurality of radio base station apparatuses (20A, 20B) coordinate and perform transmission; and a transmission section configured to transmit the plurality of pieces of channel state information to at least a radio base station apparatus amongst said plurality of radio station apparatuses (20A, 20B); and wherein the radio base station apparatus further comprises a calculating section configured to calculate a Signal to Interference and Noise Ratio, SINR, from the plurality of pieces of channel state information received, characterized by that the calculation is based on transmission weights by which signals transmitted from the plurality of base station apparatuses are multiplied when the plurality of base station apparatuses coordinate and perform transmission, when coordinated multiple-point transmission is adopted.