| 摘要 |
PROBLEM TO BE SOLVED: To realize transmission of a specified reference signal which greatly suppresses a specified reference signal insertion loss of nonlinear MU-MIMO.SOLUTION: A radio transmitter, which comprises a plurality of antennas and performs multi user MIMO (Multiple input multiple output) transmission to a plurality of radio receivers, operates to set as elements a specified reference signal to be transmitted to each of the plurality of radio receivers and a data signal destined for at least one of the radio receivers other than a destination of the specified reference signal, to perform pre-coding to a DMRS (Demodulation reference signal) vector in which each of the elements is spatially multiplexed in an identical radio resource, and to spatially multiplex the DMRS vector subjected to the pre-coding for transmission thereof to each of the radio receivers. |
