Patent ID: 8331347

Claim:
A cell search method performed by a mobile station for communication in an OFDM (Orthogonal Frequency Division Multiplexing) system, comprising: a first step of detecting a timing and a carrier frequency of a primary synchronization channel by detecting an upper layer code based on correlation detection between a lower layer code and a received signal, wherein plural primary synchronization channel sequences including the lower layer code which is common to cells and the upper layer code which differs from one cell to another are used; a second step of determining a timing and a carrier frequency of a secondary synchronization channel based on the timing and the carrier frequency of the primary synchronization channel and detecting cell-specific control information including a frame timing and a cell ID group; and a third step of performing correlation detection on each cell ID in the cell ID group with a common pilot symbol on a common pilot channel and identifying a cell ID from the cell ID group.