KEYWORDS: Polarization, Receivers, Signal detection, Telecommunications, Optical communications, Transmittance, Digital filtering, Electronic filtering, Multiplexing, Digital signal processing
The paper presents a training sequence and an algorithm used for polarization demultiplexing in polarization division
multiplexing coherent optical transmission system. The method can perform polarization demultiplex correctly and
receiver is not required to synchronize with training sequence. Frequency offset can also be estimated with the training
sequence.
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