| 摘要 |
PROBLEM TO BE SOLVED: To use a stable clock signal in the case of measuring a phase difference between a reception correlation peak and a code generating timing signal by locking to a desired frequency in advance even in the reception standby state discriminating no reception signal. SOLUTION: In the case that no reception signal is discriminated, a switch 108 is thrown to the position of an output of a reference signal generating section 106, and a phase comparator section 102 compares a phase of a generated timing signal s102 with an output signal s106 of a reference signal generating section 106 and a clock control section 104 takes synchronization with a reference spread code tip clock CLK. When a reception signal is detected, a code reset section 103 measures a phase difference between the correlation output signal s103 and the generating timing signal s107 and resets a frequency divider section 107 at a succeeding reception period. Then the switch 108 is thrown to the position of a correlation detection section 302 to set a comparison signal of the phase comparator section 102 to a signal s302 and a phase locked loop conducts synchronization acquisition. |
