Method for transmitting synchronization channel using multi-antenna

A method for transmitting a synchronization channel for use as a phase reference when decoding a broadcast channel, the method comprising:

• transmitting information on different shift values for each antenna to a user equipment;
• using the shift values so as to apply circular shifts to sequences of the synchronization channel;
• and
• transmitting the sequences having the circular shifts applied thereto from a base station to the user equipment,
• wherein a multi-antenna transmission diversity method is applied to the broadcast channel, and
• wherein a length of a cyclic prefix (CP) that is added to the sequences having the circular shift applied thereto is shorter than the shift value.

A method for transmitting a synchronization channel for use as a phase reference when decoding a control channel, the method comprising:

• using a pre-decided shift value for each antenna, wherein the shift value is pre-decided with a user equipment, so as to apply circular shifts to sequences of the synchronization channel;
• and
• transmitting the sequences having the circular shifts applied thereto from a base station to the user equipment,
• wherein a multi-antenna transmission diversity method is applied to the control channel, and
• wherein a length of a cyclic prefix (CP) that is added to the sequences having the circular shift applied thereto is shorter than the shift value.