Published in
2016 IEEE 6th International Conference on Photonics (ICP)
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BER Estimation from EVM for QPSK and 16-QAM Coherent Optical Systems
Proceedings article published in 2016 by
Martin Hudlicka 
,
Carl Lundström,
David A. Humphreys,
Irshaad Fatadin
,
Carl Lundström,
David A. Humphreys,
Irshaad Fatadin
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Abstract
BER estimation from measured EVM values is shown experimentally for QPSK and 16QAM optical signals with 28 GBd. Various impairments, such as gain imbalance, quadrature error and timing skew, are introduced into the transmitted signal in order to evaluate the robustness of the method. The EVM was measured using two different real-time sampling systems and the EVM measurement accuracy is discussed.