Patent ID: 8724607

Claim:
A transmission method for a base station in a wireless communication system, comprising: determining active antenna ports, for a User Equipment (UE) having multiple receive antennas, from among a plurality of Distributed Antenna Ports (DAPs) placed in a service area; assigning one of a non-cooperative Multiple-Input and Multiple-Output (MIMO) mode in which one active antenna port is used for signal transmission to the UE and a cooperative MIMO mode in which at least two active antenna ports are used for the signal transmission to the UE, notifying the MIMO mode assignment to the UE; determining a signal precoding vector on a basis of feedback information for the MIMO mode received from the UE; and precoding a signal using the signal precoding vector and transmitting the precoded signal through the active antenna ports, wherein, when the assigned MIMO mode is the non-cooperative MIMO mode, determining the signal precoding vector comprises: determining an inter-port precoding vector in a preset manner to compensate for differences between the active antenna ports; determining an intra-port precoding vector according to channel state information; and producing the signal precoding vector, based on the inter-port precoding vector and the intra-port precoding vector.