A communication apparatus comprising: an offset setting section configured to set a first transmission power offset to control transmission power of a first Sounding Reference Signal, SRS, and to set a second transmission power offset to control transmission power of a second SRS, the second transmission power offset being different from the first transmission power offset; a notifying section configured to notify the first transmission power offset and the second transmission power offset to a communication partner apparatus; a receiving section configured to receive from the communication partner apparatus the first SRS transmitted at the transmission power controlled by the first transmission power offset and at a first transmission time interval, and the second SRS transmitted at the transmission power controlled by the second transmission power offset and at a second transmission time interval that is different from the first transmission time interval; and a channel quality deriving section configured to estimate channel quality of a physical uplink shared channel, PUSCH, based on the received first SRS or the received second SRS, wherein the first SRS or the second SRS are transmitted at the transmission power controlled by respectively adding a value of the first and second transmission power offset to a PUSCH transmission power, characterized in that the first SRS is a periodic SRS which is transmitted periodically, and the second SRS is an aperiodic SRS which is transmitted aperiodically; and the value of the second transmission power offset is greater than the value of the first transmission power offset. an offset setting section configured to set a first transmission power offset to control transmission power of a first Sounding Reference Signal, SRS, and to set a second transmission power offset to control transmission power of a second SRS, the second transmission power offset being different from the first transmission power offset; a notifying section configured to notify the first transmission power offset and the second transmission power offset to a communication partner apparatus; a receiving section configured to receive from the communication partner apparatus the first SRS transmitted at the transmission power controlled by the first transmission power offset and at a first transmission time interval, and the second SRS transmitted at the transmission power controlled by the second transmission power offset and at a second transmission time interval that is different from the first transmission time interval; and a channel quality deriving section configured to estimate channel quality of a physical uplink shared channel, PUSCH, based on the received first SRS or the received second SRS, wherein the first SRS or the second SRS are transmitted at the transmission power controlled by respectively adding a value of the first and second transmission power offset to a PUSCH transmission power, characterized in that the first SRS is a periodic SRS which is transmitted periodically, and the second SRS is an aperiodic SRS which is transmitted aperiodically; and the value of the second transmission power offset is greater than the value of the first transmission power offset.