Phase variation compensation device, phase variation compensation method and communication device

A communication device comprising a phase variation compensation device comprising:

• first phase difference detection circuitry configured to detect a phase difference between a known pattern extracted from a received signal and a true value of the known pattern as a first phase difference;
• second phase difference detection circuitry configured to remove a modulation component by raising the received signal to the M-th power, and detect phase variation from a modulation phase point used for mapping on a transmission side, as a second phase difference, wherein M indicates the number of modulation phases in a phase modulation method of the received signal;
• and
• phase compensation circuitry configured to compensate phase variation of the received signal based on an addition result of the first phase difference and the second phase difference.

A phase variation compensation method performed by a phase variation compensation device comprising:

• detecting a phase difference between a known pattern extracted from a received signal and a true value of the known pattern as a first phase difference;
• removing a modulation component by raising the received signal to M-th power, and detecting phase variation from a modulation phase point used for mapping on a transmission side, as a second phase difference, wherein M indicates the number of modulation phases in a phase modulation method of the received signal;
• and
• compensating phase variation of the received signal based on an addition result of the first phase difference and the second phase difference.