Cross polarization interference canceling method and cross polarization interference canceling apparatus

A cross polarization interference canceling apparatus based on a reception local synchronization scheme for canceling interference between main polarization and opposite polarization, comprising:

• an error detector for extracting a difference between a demodulated signal that is said main polarization signal in which compensation for cross polarization interference has been made and a received signal which indicates an ideal state of said main polarization, and outputting an error signal that indicates extracted difference;
• a phase noise detector for outputting a phase noise difference by comparing a cross polarization interference compensating signal that is said opposite polarization signal in which compensation for cross polarization interference has been made with said error signal;
• a control signal generator for generating a control signal corresponding to said phase noise difference;
• and
• a phase rotator disposed prior to, or posterior to, a cross polarization interference canceller for generating said cross polarization interference compensating signal, for controlling a phase of said cross polarization interference compensating signal in such a direction as to suppress said phase noise difference, in response to an input of said control signal.