| 摘要 |
PROBLEM TO BE SOLVED: To provide the small four phase correlation unit of low power consumption. SOLUTION: A signal selection means 30 switching received base band I signal RI and Q signal RQ by reference spreading codes CI and CQ and multiplication means 31a and 31b multiplying a selected signal by the reference spreading codes CI and CQ are installed. Since the received base band I signal RI and Q signal RQ are rotated to 0 degree, 90 degrees, 180 degrees and 270 degrees, which are decided by the reference spreading codes on an IQ plane, the number of multiplication means can be reduced and the number of addition means can be reduced compared with a former system. Thus, the small four phase correlation unit of low power consumption can be realized. |
