Patent ID: 8175193

Claim:
An apparatus for recovering a carrier wave in a digital broadcasting receiver, comprising: a phase splitter configured to split a digitalized passband signal to mutually phase-different real and imaginary component passband complex signals; a down-converter configured to multiply the digitalized passband complex signals inputted from the phase splitter by a conjugate complex value relative to a complex sine wave of a fixed frequency inputted from a predetermined numerically controlled oscillator (NCO), and convert to a near baseband complex signal; and a carrier wave recovery unit configured to detect phase errors of the baseband complex signal via a plurality of phase error detection units having mutually different phase error detection characteristics, accumulate the detected phase errors to estimate a frequency error relative to the plurality of phase error detection units, and apply a complex sine wave to compensate the estimated frequency error to correct the frequency offset of the complex signal, wherein the plurality of phase error detection units in the carrier wave recovery unit comprises: a first phase error detection unit configured to extract a pilot signal of the complex signal and detect a phase error of the extracted pilot signal; and a second phase error detection unit configured to detect a phase error using a complex signal shape.