| 摘要 |
PROBLEM TO BE SOLVED: To obtain high frequency correction accuracy by allowing a slave station to detect an error between the receiving frequency of a pilot signal from a master station which is received via a repeater and the frequency of a local oscillator for receiving, to multiply it by a constant and to add the result to a transmission frequency and allowing the master station to detect the error between the receiving frequency and the frequency of the local oscillator and to correct and receive a receiving frequency. SOLUTION: A master station 1 makes a transmission local oscillator 101 transmit in a frequency F11 and transmits it as a pilot signal A toward a repeater 2. The repeater 2 performs frequency conversion of the signal A through a local oscillator 201 and a frequency converter 202 and retransmits it to a slave station 3 and the station 1. Next, the station 3 receives a pilot signal B, calculates deviation by comparing the receiving frequency of the signal B with a local transmission frequency of a receiving local oscillator 302 through a frequency comparator 301 and makes a correction frequency oscillator 304 oscillate a frequency that undergoes multiplication of the deviation by F1/F2 through a multiplier 307. |
