The PHS system consists of the base station and the terminal. Comm. between the base station and the terminal uses the up-going and the down-going channels, which are counted by frames. These channelsinclude respectively the control slot and the comm. slot. These slots include respectively the unique character for obtaining symbol synchronization. The special point is that both control slot and comm. slot adopt the 32 bits unique character. Further, when combines each two frames for channel coding, the odd frame and the even frame adopt different unique character. Furthermore, the odd frame and the even frame of synchronization impulses also adopt different unique character. Thus, the symbol synchronization, the frame synchronization and the system synchronization are realized.