Cycle slip compensation in coherent receiver

摘要

A receiver architecture and method recovers data received over an optical fiber channel in the presence of cycle slips. In a first cycle slip recovery architecture, a receiver detects and corrects cycle slips based on pilot symbols inserted in the transmitted data. In a second cycle slip recovery architecture, a coarse cycle slip detection is performed based on pilot symbols and a cycle slip position estimation is then performed based on carrier phase noise. The receiver compensates for cycle slips based on the position estimation.

主权项

1. A method for compensating for cycle slips in a coherent receiver, the method comprising:
receiving a sequence of frames, each frame comprising a data symbol block and a pilot symbol block, the pilot symbol block comprising one or more pilot symbols; performing a comparison of a sequence of received pilot symbol blocks from the sequence of frames to an expected sequence of pilot symbol blocks; estimating a phase rotation of the sequence of received pilot symbol blocks relative to the expected sequence of pilot symbol blocks based on the comparison; applying the estimated phase rotation to a target data symbol block in a target frame of the sequence of frames to generate a compensated data symbol block; and outputting the compensated data symbol block.