| 摘要 |
In a wireless communication system, a control unit ( 17 ) of a base station ( 1 ) sets a frequency hopping cycle longer than a predetermined value during a certain measurement interval in which an measurement of a frequency drift is conducted, allowing reception of a plurality of reference signals of the same frequency in receiving an uplink signal from a mobile station ( 2 ). The control unit ( 17 ) controls a reference signal extraction unit ( 15 ) and a reference signal phase difference calculation unit ( 16 ) so as to measure, based on the plurality of reference signals, the phase shift amount of a received signal at the same frequency. Thus, the wireless communication system can measure the phase shift amount by controlling the frequency hopping.
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