Patent ID: 7453971

Claim:
A method for compensating a sampling phase error of a received signal, the method comprising: receiving the received signal and a sampling clock signal and thereby generating a plurality of phase detection signals, wherein each of the phase detection signals corresponds to a phase state and a phase error between the received signal and the sampling clock signal; outputting a first phase regulating signal according to the phase detection signals for fine regulation when an absolute value of the phase detection signal, indicating the phase error, is not larger than a first threshold value, wherein when a first number of the phase detection signals continuously represent a phase leading state, the first phase regulating signal includes at least one phase backward regulating signal and at least a phase non-backward regulating signal in order to prevent over-adjustment of the sampling clock signal, and when a second number of the phase detection signals continuously represent a phase lagging state, the first phase regulating signal includes at least one phase forward regulating signal and at least a phase non-forward regulating signal in order to prevent over-adjustment of the sampling clock signal; and adjusting the sampling clock signal according to the first phase regulating signal for the fine regulation; wherein the first number of phase detection signals and the second number of phase detection signals depend on a delay time from detection of a phase error between the received signal and the sampling clock signal to adjustment of the sampling clock signal for the phase error.