| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide technology that improves communication quality between a mobile communication device and a base station in an MIMO system. <P>SOLUTION: In the communication system including a first radio communication apparatus and a second radio communication apparatus that includes multiple antennas, the first radio communication apparatus receives transmission signals transmitted from multiple antennas as reception signals, acquires a predetermined parameter for each antenna based on the reception signals, creates control information for causing the second radio communication apparatus to control transmission signals so that the parameter becomes a predetermined target value for each antenna, compares absolute values of differences between each acquired parameter and the target value, and transmits control information corresponding to the reception signal for which the absolute value is large to the second radio communication apparatus with priority over control information corresponding to the reception signal for which the absolute value is small, the second radio communication apparatus receives control information from the first radio communication apparatus and controls transmission signals for each antenna according to the control information. <P>COPYRIGHT: (C)2010,JPO&INPIT |
