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Photonics 2016, 3(2), 21; doi:10.3390/photonics3020021

Estimation of BER from Error Vector Magnitude for Optical Coherent Systems

National Physical Laboratory, Teddington, Middlesex TW11 0LW, UK
Received: 22 March 2016 / Revised: 18 April 2016 / Accepted: 19 April 2016 / Published: 21 April 2016
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Abstract

This paper presents the estimation of bit error ratio (BER) from error vector magnitude (EVM) for M-ary quadrature amplitude modulation (QAM) formats in optical coherent systems employing carrier phase recovery with differential decoding to compensate for laser phase noise. Simulation results show that the relationship to estimate BER from EVM analysis for data-aided reception can also be applied to nondata-aided reception with a correction factor for different combined linewidth symbol duration product at the target BER of 10 3 . It is demonstrated that the calibrated BER, which would otherwise be underestimated without the correction factor, can reliably monitor the performance of optical coherent systems near the target BER for quadrature phase shift keying (QPSK), 16-QAM, and 64-QAM. View Full-Text
Keywords: error vector magnitude (EVM); quadrature amplitude modulation (QAM); carrier phase recovery error vector magnitude (EVM); quadrature amplitude modulation (QAM); carrier phase recovery
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Fatadin, I. Estimation of BER from Error Vector Magnitude for Optical Coherent Systems. Photonics 2016, 3, 21.

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