Apparatus for modulation ranging signals in broadband wireless access communication system and method thereof

PURPOSE: An apparatus and a method of modulating ranging signals in a broadband wireless access communication system are provided to reduce an initial wireless access time and a hand-over delay time by detecting the ranging signals correctly and rapidly. CONSTITUTION: A subscriber terminal is synchronized with a base station through ranging in order to receive base station information from the base station(2301). The subscriber terminal generates a first code assigned to the corresponding base station by using the base station information(2303). The base station generates a second code for distinguishing subscriber terminals from each other within corresponding cells of the base station(2305). A new ranging code is generated by combining the first code with the second code(2307). The ranging code is mapped onto an assigned sub-carrier and is transmitted to the base station(2309,2311).