Patent ID: 8774736

Claim:
A method of performing an antenna switching for data transmission by a transmission end in a communication system using a plurality of transmission antennas, the method comprising: transmitting a first reference signal and a plurality of second reference signals via a transmission antenna transmitting data; transmitting at least one second reference signal among the plurality of second reference signals via at least one transmission antenna not transmitting data, by switching the transmission antenna when to transmit the at least one second reference signal, when a mobility of a user is larger than a prescribed threshold; receiving feedback signals in response to the transmitted first and second reference signals; and performing the antenna switching by selecting a transmission antenna for the data transmission among the plurality of transmission antennas based on the received feedback signals, wherein an interval of transmitting the at least one second reference signal is determined based on the mobility of the user, and wherein a number of reference signals within a transmission unit for the data transmission is equal to or greater than a number of the plurality of transmission antennas.