| 摘要 |
PURPOSE: A transmitter, a communication method thereof, a receiver, and a wireless communication system are provided to improve the efficiency of system transmission through a MIMO antenna. CONSTITUTION: A base station(420) receives first CSI(Channel State Information) and second CSI from a channel information feedback unit(414) through an antenna array(428). The base station determines first precoder(422) and a precoding matrix of a second precoder in a first code book and a second code book based on channel state information. The base station performs precoding of data symbols. |
