Journal ArticleDOI
Rate Adaptation and Reach Increase by Probabilistically Shaped 64-QAM: An Experimental Demonstration
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TLDR
A transmission system with adjustable data rate for single-carrier coherent optical transmission is proposed, which enables high-speed transmission close to the Shannon limit, and it is experimentally demonstrated that the optical transmission of probabilistically shaped 64-QAM signals outperforms the transmission reach of regular 16- QAM and regular 64-ZAM signals.Abstract:
A transmission system with adjustable data rate for single-carrier coherent optical transmission is proposed, which enables high-speed transmission close to the Shannon limit. The proposed system is based on probabilistically shaped 64-QAM modulation formats. Adjustable shaping is combined with a fixed-QAM modulation and a fixed forward-error correction code to realize a system with adjustable net data rate that can operate over a large reach range. At the transmitter, an adjustable distribution matcher performs the shaping. At the receiver, an inverse distribution matcher is used. Probabilistic shaping is implemented into a coherent optical transmission system for 64-QAM at 32 Gbaud to realize adjustable operation modes for net data rates ranging from 200 to 300 Gb/s. It is experimentally demonstrated that the optical transmission of probabilistically shaped 64-QAM signals outperforms the transmission reach of regular 16-QAM and regular 64-QAM signals by more than 40% in the transmission reach.read more
Citations
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Journal ArticleDOI
DCI Field Trial Demonstrating 1.3-Tb/s Single-Channel and 50.8-Tb/s WDM Transmission Capacity
Fred Buchali,Karsten Schuh,Roman Dischler,Mathieu Chagnon,Vahid Aref,Henning Buelow,Qian Hu,Florian Pulka,Massimo Frascolla,Islam Younis,Mohamed El-Zonkoli,Peter J. Winzer +11 more
TL;DR: In this article, the authors demonstrate that using only a single digital-to-analog converter per complex signal dimension, they achieve a net bit rate of 1.3 Tb/s per wavelength (single-channel operation) and more than 1.25 Tb /s per channel in a 40-channel WDM system with a spectral efficiency of 11.29 bits/s/Hz.
Proceedings ArticleDOI
Residual Non-Linear Phase Noise in Probabilistically Shaped 64-QAM Optical Links
TL;DR: It is shown that the performance penalty for probabilistically-shaped constellations induced by residual non-linear phase noise after standard CPE is significantly higher in low-symbol rate systems, canceling the potential gain achievable through symbol rate optimization.
Proceedings ArticleDOI
Single-Channel Direct Detection Reception Beyond 1 Tb/s
Di Che,Sethumadhavan Chandrasekhar,Xi Chen,G. Raybon,Peter J. Winzer,Chuanbowen Sun,William Shieh +6 more
TL;DR: This work demonstrates the world-first single-channel direct detection beyond 1-Tb/s with 1.26-T b/s line rate and 1.02-TB/s net rate via an 86-GHz Stokes vector receiver that recovers totally single-polarization-equivalent 252-Gbaud probabilistic-shaped 64-QAM signal.
Journal ArticleDOI
Extending a Nonlinear SNR Estimator to Include Shaping Distribution Identification for Probabilistically Shaped 64-QAM Signals
TL;DR: In this paper, an estimation method for the nonlinear signal-to-noise ratio (SNR) was extended to simultaneously identify the shaping distribution for rate-adaptive probabilistically shaped (PS) 64-ary quadrature amplitude modulation (QAM) constellations.
Posted Content
End-to-end Learning for GMI Optimized Geometric Constellation Shape
TL;DR: In this paper, an autoencoder-based geometric shaping that includes optimizing bit mappings is proposed to achieve up to 0.2 bits/QAM symbol gain for a variety of data rates and in the presence of transceiver impairments.
References
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Book
Information Theory and Reliable Communication
TL;DR: This chapter discusses Coding for Discrete Sources, Techniques for Coding and Decoding, and Source Coding with a Fidelity Criterion.
Journal ArticleDOI
Capacity Limits of Optical Fiber Networks
TL;DR: In this article, the capacity limit of fiber-optic communication systems (or fiber channels?) is estimated based on information theory and the relationship between the commonly used signal to noise ratio and the optical signal-to-noise ratio is discussed.
Journal ArticleDOI
Threshold Saturation via Spatial Coupling: Why Convolutional LDPC Ensembles Perform So Well over the BEC
TL;DR: The fundamental mechanism that explains why “convolutional-like” or “spatially coupled” codes perform so well is described, and it is conjecture that for a large range of graphical systems a similar saturation of the “dynamical” threshold occurs once individual components are coupled sufficiently strongly.
Journal ArticleDOI
Bandwidth Efficient and Rate-Matched Low-Density Parity-Check Coded Modulation
TL;DR: A new coded modulation scheme is proposed that operates within less than 1.1 dB of the AWGN capacity 1/2 log2(1 + SNR) at any spectral efficiency between 1 and 5 bits/s/Hz by using only 5 modes.