Patent ID: 6947512

Claim:
A carrier reproducing method of a PSK modulated signal, comprising steps of: synchronously detecting the PSK modulated signals with a reproducing carrier signal from an oscillator to create a synchronous detecting signal; phase-detecting said synchronous detecting signal to create a phase detecting signal; creating an auto-correlation function output taken over a predetermined time interval (TMCC period) on said phase detecting signal; and applying a control signal based on a period of said auto-correlation function output to said oscillator to make a reproducing control signal from said oscillator synchronize with a carrier of the PSK modulated signal, characterized in that a phase rotation of a predetermined angular velocity (α) which is larger than a maximum expected alienation frequency of said oscillator with respect to a carrier frequency to said phase detecting signal so that on the phase detecting signal to which said phase rotation is given, the auto-correlation function output taken over said predetermined period is created.