APPARATUS AND A METHOD FOR EXCHANGING A DOWNLINK CHANNEL AND AN UPLINK CHANNEL IN AN FDD MU-MIMO SYSTEM, CAPABLE OF USING AN UPLINK CHANNEL WHICH KNOWS A CHANNEL FEATURE AS A DOWNLINK CHANNEL

摘要

PURPOSE: An apparatus and a method for exchanging a downlink channel and an uplink channel in an FDD(Frequency Division Duplex) MU-MIMO(Multiuser Multiple Input Multiple Output) system are provided to grasp channel features of a downlink channel through channel mutuality, thereby improving system performance.;CONSTITUTION: Channel correlation is measured among terminals about an uplink channel. Terminals of low channel correlation are grouped. An uplink channel and a downlink channel are mutually changed. The grouped result is applied to the downlink channel. An uplink channel of an f2 frequency band is used as a downlink channel to apply the grouped result to the downlink channel.;COPYRIGHT KIPO 2010