| 摘要 |
PROBLEM TO BE SOLVED: To dispense with accurate synchronization among whole base stations and also to differentiate plural base stations without making processing complicated. SOLUTION: This system is provided with a PN1 generator 14, which synchronizes with a frame timing and generates a PN1 code, an inverse spreader 15 which performs inverse spreading of a receive signal by a spreading code w1 that is for differentiating channels, an inverse spreader 16, which performs inverse spreading of a signal undergoing inverse spreading by the spreader 15 by the PN1 code generated by the generator 14, a sliding correlating device 19, which calculates a correlation value between the receive signal that undergoes inverse spreading in the spreader 16 and a PN2 code generated by a PN2 generator 17, while shifting timing gradually and a peak detector 20 which detects the peak of the correlation value calculated by the device 19, and the system generates the PN2 code, based on a peak value detected by the detector 20 and the frame timing. |
