| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce deterioration of communication quality in uplink MU-MIMO communication in which a base station performs simultaneous reception from a plurality of terminals. <P>SOLUTION: In radio communication in which a plurality of terminals simultaneously transmit data to a base station using an identical frequency, the base station detects deviation of a signal position and estimates deviation of frequency on a terminal-by-terminal basis, on the basis of a training symbol transmitted from the terminals and a training symbol retained in the base station. The base station then generates a control signal including information specifying the training symbol for use in uplink transmission on an identical frequency at an identical time, so as to transmit the signal to a terminal device. The terminal device receives the signal from the base station, calculates frequency deviation obtained from the received signal, and corrects to transmit a transmission signal, to which a unique training symbol specified by the control signal is added according to the calculated frequency deviation. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
