Carrier phase synchronizing circuit capable of recovering carrier phase synchronization at a short time

Abstract From the Canadian patent

In a receiver comprising a demodulator for demodulating a received signal into a demodulated signal a, carrier phase synchronizing circuit comprises a phase rotating circuit for phase rotating the demodulated signal into a phase-rotated signal in response to a phase rotation control signal, a first carrier phase extracting circuit for extracting a first carrier phase error estimation signal from the phase-rotated signal, a second carrier phase extracting circuit for extracting a second carrier phase error estimation signal from the phase-rotated signal, a comparator for comparing a second carrier phase estimated error value indicated by the second carrier phase error estimation signal with …