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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Proceedings ArticleDOI
Linewidth-tolerant carrier phase recovery in probabilistically shaped M-QAM systems with generalized circular harmonic expansion
TL;DR: In this paper , a carrier phase recovery algorithm using generalized circular harmonic expansion is proposed for probabilistically shaped M-QAM systems, which achieves a higher laser linewidth tolerance compared with two-stage blind phase search and Kullback-Leibler divergence based algorithms.
Journal ArticleDOI
Scalable filterless coherent point-to-multipoint metro network architecture
Carlos Rincón Castro,Antonio Napoli,Mario Porrega,Amir Rashidinejad,Marco Quagliotti,G. Riccardi,David Hillerkuss,Amin Yekani,Fady Masoud,Atul Mathur,Joao Pedro,Bernhard Spingler,Sezer Erkilinc,Aaron Chase,Tobias A. Eriksson,Dave Welch +15 more
TL;DR: In this article , the authors compared two coherent solutions: traditional point-to-point (P2P) and digital subcarrier (DSC)-based coherent modules for P2P and P2M transmission.
Proceedings ArticleDOI
Practical Implementation of Sequence Selection for Nonlinear Probabilistic Shaping
TL;DR: Two novel techniques to implement sequence selection (SS) for sequence selection for nonlinearity mitigation are proposed, demonstrating a nonlinear shaping gain of 0 .
Proceedings ArticleDOI
Optimal transponder technology for transporting 800 GbE services in IP-over-WDM backbone networks
TL;DR: In this paper , the authors compared the benefit of Elastic Optical Transponders (EOTs) enabling 130GBaud WDM channels for transporting 800GE services, showing ability to minimize number of required EOTs per Gb/s in regional and long-haul networks.
Digital Four-Dimensional Transceiver IQ Characterization
TL;DR: In this paper , a 4D signal-propagation model that takes into account inter-polarization IQ crosstalk was proposed to separate the 4D IQ characteristics of the transmitter and receiver from the coefficients of a single-layer complex 8×2 multiple-input multiple-output adaptive equalizer.
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.
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Threshold Saturation via Spatial Coupling: Why Convolutional LDPC Ensembles Perform So Well over the BEC
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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.