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OSNR Monitoring Based on Spectrum Analysis of QPSK Training Sequence

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Abstract

An accurate OSNR monitoring method based on spectrum analysis of QPSK training sequence is proposed. Both numerical results (28GBaud system) and experimental results (20GBaud system) show the OSNR (10~30dB) estimation error is within 0.4 dB.

© 2021 The Author(s)

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