Comparison of Probabilistically Shaped 64QAM With Lower Cardinality Uniform Constellations in Long-Haul Optical Systems
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2017.2752842
Abstract: In this paper, we compare the performance of probabilistically shaped 64QAM with uniform 16QAM and 32QAM modulation formats at the same net data rate in long-haul coherent optical communications systems. Experimental results at 16 GBaud… read more here.
Keywords: 64qam lower; shaped 64qam; probabilistically shaped; long haul ... See more keywords
Extending a Nonlinear SNR Estimator to Include Shaping Distribution Identification for Probabilistically Shaped 64-QAM Signals
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2019.2913595
Abstract: An estimation method for the nonlinear signal-to-noise ratio (SNR) is extended to simultaneously identify the shaping distribution for rate-adaptive probabilistically shaped (PS) 64-ary quadrature amplitude modulation (QAM) constellations. An artificial neural network (ANN) is trained… read more here.
Keywords: shaping distributions; probabilistically shaped; shaping distribution; identification ... See more keywords
Likelihood-Based Selection Radius Directed Equalizer With Time-Multiplexed Pilot Symbols for Probabilistically Shaped QAM
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2021.3098220
Abstract: Probabilistically shaped (PS) quadrature amplitude modulation (QAM) recently established itself as the solution to adopt for state-of-the-art coherent transponders. This in turn has drawn attention to the rework of conventional digital signal processing (DSP) algorithms,… read more here.
Keywords: radius directed; time multiplexed; probabilistically shaped; time ... See more keywords
Probabilistically shaped CAP-9 transmission based on reverse distribution model
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DOI: 10.1117/1.oe.59.10.106104
Abstract: Abstract. A probabilistically shaped 9-ary carrierless amplitude and phase (CAP-9) optical modulation format based on a reverse distribution model is proposed. We experimentally demonstrate the transmission of 33.3-Gb  /  s PS-CAP-9 signals over 25-km standard single-mode fiber… read more here.
Keywords: based reverse; probabilistically shaped; cap; reverse distribution ... See more keywords
Probabilistically shaped polar-coded MIMO-FSO communication systems with spatially correlated fading.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.459583
Abstract: In this paper, the probabilistically shaped polar-coded multiple-input multiple-output free-space optical (MIMO-FSO) communication system with or without spatially correlated (SC) fading is investigated to improve transmission performance. The designed shaping-polar encoder can flexibly generate three… read more here.
Keywords: shaped polar; probabilistically shaped; spatially correlated; polar coded ... See more keywords