Apparatus for detectingvia signal via the random access channel in wireless telecommunication system

The random access channel is used to set the uplink from the mobile station to the base station in an SC-FDMA system. SC-FDMA system comprises at least one base station for establishing wireless communication with a plurality of mobile stations and a plurality of mobile stations, respectively, and is operable in the frequency band of a predetermined range. The base station receives the preamble and the message from the mobile station through a random access channel. According to one embodiment of the invention, the first mobile station and second mobile stations each for transmitting signals over a first random access channel and a second random access channel to the base station, the first and second random access channel, the adjacent frequency bands are allocated. In accordance with another embodiment of the invention, the random access channel preamble is comprised of a code sequence of CAZAC sequence.