Patent ID: 8102948

Claim:
A carrier recovery apparatus, comprising: a pilot strength detector, for determining whether a pilot strength of an input signal is greater than a threshold value to generate a control signal; a first lock loop being a pilot-based frequency and phase lock loop (FPLL), for performing a first carrier recovery on the input signal; a second lock loop being a pilot-less phase lock loop (PLL), for performing a second carrier recovery on the input signal; and a controller, coupled to the pilot strength detector, the first lock loop, and the second lock loop, for selectively allowing the first lock loop to perform the first carrier recovery on the input signal or the second lock loop to perform the second carrier recovery on the input signal according to the control signal, wherein the controller is a selector for transmitting the input signal to the first lock loop when the control signal indicates that the pilot strength of the input signal is greater than the threshold value, and transmitting the input signal to the second lock loop when the control signal indicates that the pilot strength of the input signal is not greater than the threshold value.