Blind Modulation Format Identification Using Differential Phase and Amplitude Ratio

Blind Modulation Format Identification Using Differential Phase and Amplitude Ratio

We propose a blind digital modulation format identification (MFI) method for coherent optical fiber communication systems. Based on the evaluation of differential phase distribution ratio (DPDR) and average of amplitude ratio (AAR), a monitoring factor <inline-formula><tex-math notation=&qu...

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Bibliographic Details
Main Authors: Qingzhao Tan, Aiying Yang, Peng Guo
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Photonics Journal
Subjects:
Modulation format identification
differential phase distribution ratio
amplitude ratio
coherent optical communications
Online Access:https://ieeexplore.ieee.org/document/8630002/
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Summary:We propose a blind digital modulation format identification (MFI) method for coherent optical fiber communication systems. Based on the evaluation of differential phase distribution ratio (DPDR) and average of amplitude ratio (AAR), a monitoring factor <inline-formula><tex-math notation="LaTeX">${R}$</tex-math></inline-formula>, the product of DPDR and AAR, is defined to distinguish whether the signal modulation format is QPSK, 16-QAM, or 64-QAM. Simulation and experimental results demonstrate that the proposed MFI can perform an identification when the OSNR of the incoming signal is greater than 12&#x00A0;dB. The proposed method needs no extensive training data sets and can tolerate residual chromatic dispersion (&#x2212;210&#x2013;210 ps/nm) and phase noise.
ISSN:1943-0655

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