| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a base station, a terminal and a radio communication system, capable of controlling the transmission weight of an MIMO transmission system, without having to execute frequent CQI reporting for each stream. <P>SOLUTION: The base station for MIMO-transmitting K (K is an integer≥2) pieces of streams to the terminal by using a plurality of antennas includes: a control information generation means for generating first to K-th control information specifying physical resources to use in the transmission of first to K-th streams including data respectively; a control information transmission means for transmitting the first to K-th control information to the terminal; a detection means for detecting the first physical resource which is the physical resource specified in the k1-th control information (k1 is one of the values of 1 to K) and which is not specified in the k2-th control information (k2 is one of the values of 1 to K, which is different from k1); and a signal transmission means for transmitting the k2-th stream, including quality measurement signals for measuring the channel quality of the first physical resource in the terminal by using the first physical resource. <P>COPYRIGHT: (C)2010,JPO&INPIT |
