Patent attributes
A wireless communication apparatus performs fast control even on a large phase rotation of a received signal to synchronize the frequency of a received signal with a specified frequency. A symbol-phase-difference detector detects an intersymbol phase difference of an input signal demodulated by a quadrature demodulator. When a minute-phase-error detector detects an intersymbol minute phase error between symbols whose phase difference has been detected by the symbol-phase-error detector, an oversampling/phase-rotational-amount detecting section detects an intersymbol phase rotational amount of the received signal by oversampling the received signal at a rate higher than a symbol rate. A coarse-phase-error detector detects a coarse phase error between symbols whose phase difference has been detected by the oversampling/phase-rotational-amount detecting section. A frequency control amount calculator computes a frequency control amount for the process station to control the frequency of the input signal.
