A method for selecting one or more antennas disposed at a base station BS of a wireless communication system, where the method includes: transmitting, to one or more use equipment (UE), one or more initial synchronization signal blocks (SSB) and one or more initial channel state information-reference signals (CSI-RS) using a plurality of antenna ports, receiving, from the one or more UE, signals including at least one parameter indicative of corresponding operating conditions at the one or more UE in response to the transmitted one or more initial SSB and CSI-RS, selecting one or more antenna ports among the plurality of antenna ports based on the received at least one parameter, and performing downlink transmission using the selected one or more antenna ports.