A method performed by a base station in a wireless communication system includes receiving, from a terminal configured with timing advance (TA), an uplink signal in an uplink period, according to a time division duplex (TDD) configuration, transmitting, through a transmission path of the base station to the terminal, an advance signal for a predetermined duration between an end point of receiving the uplink signal and a start point of a downlink period of the TDD configuration, the transmission path of the base station having a power amplifier as a transmission end, and transmitting, to the terminal, a downlink signal in the downlink period.