Patent ID: 8189558

Claim:
A method for generating a common channel for a downlink by a base station having a plurality of antennas, the method comprising: generating a common channel signal for generating a common channel for generating common data to be provided to a plurality of mobile stations through the downlink, the common channel signal including a primary synchronization channel signal, a secondary synchronization channel signal, and a primary broadcasting channel signal; mapping the common channel signal on the plurality of antennas; and receiving the common channel signal mapped on the plurality of antennas according to the plurality of antennas; allocating the common channel signal to a subcarrier and a time resource in an order of a predetermined primary broadcasting channel, a secondary synchronization channel, and a primary synchronization channel; and outputting a symbol, wherein generating the common channel signal comprises: generating a secondary synchronization channel sequence allocated to a plurality of cell groups within a coverage area of the base station; generating a complex secondary synchronization modulation signal for modulating a secondary synchronization channel; and multiplying the secondary synchronization modulation signal and the secondary synchronization channel sequence to generate the secondary synchronization channel signal.