| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a receiver apparatus and a transmitter apparatus enabling more efficient concept for precoding operation in a MIMO-system, achieving a higher link and system capacity with less feedback information and reduced complexity. <P>SOLUTION: The receiver apparatus (100) controls precoding of a transmitter apparatus by a transmission scheme having a first number of transmit antennas and a second number of receive antennas. The receiver apparatus (100) comprises a channel estimator (110) for estimating a radio channel between the transmitter and the receiver apparatus (100) based on a received signal to determine a radio channel estimate (H<SB>k</SB>). The receiver apparatus (100) further comprises a processing unit (120) for providing possible new precoding matrices (C'<SB>m</SB>). The receiver apparatus (100) further comprises a searcher (130) for searching a new precoding matrix fulfilling an optimization criterion, and a transmit unit (140) for transmitting an update matrix index (m<SB>opt</SB>). <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
