Patent ID: 7852813

Claim:
A system for performing cell acquisition in a frequency overlay communication system including a first frequency band and a second frequency band, the system comprising: a base station (BS) for generating a reference signal used for identifying a cell using a specific sequence in a predetermined frequency band, and transmitting the reference signal; and a mobile station (MS) for receiving the reference signal to determine whether the BS uses the first frequency band or the second frequency band, determining a reference signal having a maximum correlation value through correlation calculation with at least one predefined sequence, and detecting a BS identifier (ID) corresponding to the determined reference signal, wherein the second frequency band is overlaid with the first frequency band, and includes an overlay region and a non-overlay region, wherein the overlay region is a band portion of the second frequency band included in the first frequency band, and the non-overlay region is a remaining band portion of the second frequency band that is not included in the first frequency band, and wherein the reference signal includes a first reference signal transmitted through the band portion, and a second reference signal transmitted through the remaining band portion.