OPERATING METHOD OF USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM AND USER EQUIPMENT THEREFOR

An operating method of a user equipment in a wireless communication system includes dividing a first frequency band, from among a plurality of frequency bands, into a plurality of sub-bands, based on a first radio frequency technology (RAT), measuring peak powers of each sub-band of the plurality of sub-bands, determining at least one effective sub-band from among the plurality of sub-bands, based on the measured peak powers, detecting, based on the determining of the at least one effective sub-band, a first effective signal through a frequency search operation using a correlation component of a synchronization signal corresponding to at least one of the first frequency band and the at least one effective sub-band, and performing initial access to a cell, based on the detecting the first effective signal.