| 摘要 |
In a multicarrier cellular system, a second synchronizing code (a Walsh code or a GCL code), which is subjected to the mapping and which becomes a second synchronizing channel, is used as a signal for a mobile station terminal device itself to specify which base station cell it is in. A signal transmitted from the base station to the mobile station terminal device is subjected to the mapping, and becomes a wireless frame which has a two-dimensional expansion in a frequency direction and a time direction. A first synchronizing channel and the second synchronizing channel are subjected to the mapping, and becomes a synchronizing channel which is implanted at a plurality of portions in the wireless frame.In the case where a certain series number of the second synchronizing code to specify a cell or a cell group as the second synchronizing channel is subjected to the mapping and becomes the wireless frame, such a phase rotation that one wireless frame becomes one cycle or a circulating shift is provided to the second synchronizing code in accordance with a position where a synchronizing channel subjected to the mapping is in the wireless frame and the mapping is carried out for the second synchronizing code. On the receiving side, when the phase rotation angle or the circulating shift amount of the second synchronizing code is known, the head timing of the wireless frame is known. |
