Abstract: A method of generating a frame sync signal of a mobile terminal is provided. The mobile terminal includes an input unit, which receives through an I-channel and a Q-channel frames into which a data frame transmitted from a base station is divided; a preamble detection unit, which detects timing information of the base station from a preamble pattern of the received frames; a frame sync pattern detection unit, which receives the frame through the I-channel and an output of the preamble detection unit and verifies the timing information; and a frame sync signal generation unit, which generates a frame sync signal according to an output of the frame sync pattern detection unit.