| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio base station device, a mobile terminal device, and a radio communication method for transmitting and receiving a channel quality measurement reference signal of a downlink, while taking into account the orthogonalization among transmission antennas, orthogonalization between cells and high-precision estimation of interference.SOLUTION: In this radio communication method, the radio base station device generates channel quality measurement reference signals; executes non-orthogonalization processing to the channel quality measurement reference signals so as to cause non-orthogonalization between at least some cells, allowing the channel quality measurement reference signals to be orthogonal between the transmission antennas; transmits the reference signal to the mobile terminal device, together with control information, and the mobile terminal device receives downlink signals containing control information and channel-quality measurement reference signals; extracts the channel-quality measurement reference signals by using the control information; and measures the channel quality by using the channel quality measurement reference signals. |
