Patent ID: 7512195

Claim:
A frequency control apparatus which synchronizes a frequency of a received signal, and comprises: an oversampling/phase-rotational-amount detecting section which detects an intersymbol phase rotational amount between symbols of said received signal, modulated by a prescribed modulation method, by oversampling said received signal at a rate higher than a symbol rate; a coarse-phase-error detector which detects an amount exceeding a maximum phase deviation in a specified intersymbol phase deviation based on said prescribed modulation method as a coarse phase error when said intersymbol phase rotational amount detected by said oversampling/phase-rotational-amount detecting section exceeds a predetermined amount equal to or greater than said maximum phase deviation; a frequency control amount acquisition section which acquires a frequency control amount based on said coarse phase error; and a frequency controller which controls said frequency of said received signal according to said frequency control amount.