an apparatus and method for transmitting / receiving an s - sch in an institute of electrical and electronics engineers 802 . 16m wireless communication system are provided . a method for transmitting , by a transmitter , a secondary synchronization channel in a communication system includes generating a sequence depending on a cell identification , determining a subcarrier set comprising subcarriers to map the generated sequence , based on a fast fourier transform size and a segment id , and mapping the generated sequence to the subcarriers of the determined subcarrier set .