Phase difference estimation device and communication device having the phase difference estimation device

摘要

A device includes a recovery unit that separates recovery data and a recovery clock from input data, a first detection unit that detects a timing at which a phase difference between a generated processing clock and the recovery clock is zero, a second detection unit that detects a synchronization code included in the recovery data using the recovery clock, and a calculation unit that calculates a phase difference between the synchronization code and the processing clock using a ratio between a first number of clock generation times of the processing clock in a period from a first timing at which the detected phase difference is zero to a second timing at which the phase difference is subsequently zero, and a second number of clock generation times of the processing clock in a period from the first timing to a third timing in which the synchronization code is detected.