Analysis of EEPN-Induced Phase and Amplitude Distortions in Coherent Optical QPSK Systems | IEEE Conference Publication | IEEE Xplore

Analysis of EEPN-Induced Phase and Amplitude Distortions in Coherent Optical QPSK Systems


Abstract:

We thoroughly examine intra- and inter-symbol EEPN and calculate the variances of EEPN-induced phase, amplitude noise, and their ratio for coherent QPSK signals. We also ...Show More

Abstract:

We thoroughly examine intra- and inter-symbol EEPN and calculate the variances of EEPN-induced phase, amplitude noise, and their ratio for coherent QPSK signals. We also provide the phase-compensated EEPN following blind phase search (BPS). All theoretical proofs are validated through simulation.
Date of Conference: 05-08 November 2022
Date Added to IEEE Xplore: 10 April 2023
ISBN Information:
Conference Location: Shenzhen, China

Funding Agency:

References is not available for this document.

I. Introduction

Coherent optical receivers with electronic dispersion compensation have an inescapable impairment called equalization-enhanced phase noise (EEPN). EEPN has been analytically derived, and its impact has been studied in various simulations [1], [2]. Its probability distribution function (PDF) has also been studied [3], [4]. From the constellation and PDF of EEPN, EEPN causes phase distortion that is about twice as large as amplitude distortion. It is, however, only a preliminary estimate based on simulation. Further, the phase noise compensation algorithms in the receiver can partially compensate for the EEPN [5], but there is no closed-form forecast of the EEPN decrease after phase noise mitigation.

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1.
W. Shieh and K.-P. Ho, "Equalization-enhanced phase noise for coherent-detection systems using electronic digital signal processing", Opt. Express, vol. 16, no. 20, pp. 15718, Sep. 2008.
2.
Kakkar et al., "Comprehensive Study of Equalization-Enhanced Phase Noise in Coherent Optical Systems", J. Light. Technol., vol. 33, no. 23, pp. 4834-4841, Dec. 2015.
3.
A. P. T. Lau, T. S. R. Shen, W. Shieh and K.-P. Ho, "Equalization-enhanced phase noise for 100Gb/s transmission and beyond with coherent detection", Opt. Express, vol. 18, no. 16, pp. 17239, Aug. 2010.
4.
R. Farhoudi et al., "Analytical PDF of Decision Statistic for Coherent MPSK with Electronic Dispersion Equalization", Optical Fiber Communication Conference & Exposition IEEE, pp. JW2A.56, Mar.2012.
5.
R. Farhoudi, A. Ghazisaeidi and L. A. Rusch, "Performance of carrier phase recovery for electronically dispersion compensated coherent systems", Opt. Express, vol. 20, no. 24, pp. 26568, Nov. 2012.

References

References is not available for this document.