Phase noise compensator, demodulator, receiver, communication system, and phase noise compensation method

摘要

It compensates for phase noise with high accuracy without requiring a large increase in computational complexity and equipment size. The phase noise compensator (10) is used in a demodulator that demodulates a transmission signal modulated by a modulation scheme that uses phase information for data identification. The phase detector (11) detects a phase error of the received pilot symbol sequence included in the received symbol sequence. The first filter (12) refers to the phase error in time series to sequentially estimate the first phase noise component. The second filter (13) refers to the phase error in anti-time series to sequentially estimate the second phase noise component. The synthesis processing unit (14) estimates the phase noise component of the received symbol based on the estimated first phase noise component, the estimated value of the estimated second phase noise component, and the phase error. The phase rotator (15) rotates the phase of the received symbol based on the estimated phase noise component of the received symbol.