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
Normalized Generalized Mutual Information as a Forward Error Correction Threshold for Probabilistically Shaped QAM
TL;DR: It is shown that the normalized generalized mutual information represents an excellent forward error correction (FEC) threshold for uniform as well as for probabilistically shaped QAM and hence allows to accurately predict post-FEC performance from measured pre-Fec data.
Journal ArticleDOI
Beyond 1 Tb/s Intra-Data Center Interconnect Technology: IM-DD OR Coherent?
Xiang Zhou,Ryohei Urata,Hong Liu +2 more
TL;DR: A comparative study of fixed IM-DD PAM versus coherent polarization multiplexed-quadrature amplitude modulation (PM-QAM) is presented for a 1.6 Tb/s solution, with consideration of link loss/reach budget, power consumption, implementation complexity, as well as fan-out granularity.
Journal ArticleDOI
Advanced C+L-Band Transoceanic Transmission Systems Based on Probabilistically Shaped PDM-64QAM
Amirhossein Ghazisaeidi,Ivan Fernandez de Jauregui Ruiz,Rafael Rios-Muller,Laurent Schmalen,Patrice Tran,Patrick Brindel,Alexis Carbo Meseguer,Qian Hu,Fred Buchali,Gabriel Charlet,Jeremie Renaudier +10 more
TL;DR: The most recent advanced concepts and methods employed in the cutting-edge spectrally efficient coherent fiber-optic transoceanic transmission systems, such as probabilistic shaping, adaptive digital nonlinear compensation, rate-adaptive spatially coupled low-density parity check codes, and dual-band C+L-band transmission are reviewed.
Journal ArticleDOI
Field and lab experimental demonstration of nonlinear impairment compensation using neural networks
Shaoliang Zhang,Fatih Yaman,Kohei Nakamura,Takanori Inoue,Valey Kamalov,Ljupcho Jovanovski,Vijay Vusirikala,Eduardo Mateo,Yoshihisa Inada,Ting Wang +9 more
TL;DR: A single-step, system agnostic nonlinearity compensation algorithm based on a neural network is proposed to pre-distort symbols at transmitter side to demonstrate ~0.6 dB Q improvement after 2800 km standard single-mode fiber transmission using 32 Gbaud signal.
Journal ArticleDOI
Nonlinear Interference Mitigation: Methods and Potential Gain
Ronen Dar,Peter J. Winzer +1 more
TL;DR: In this paper, the potential benefits of digital nonlinearity compensation (NLC) techniques in fully loaded coherent wavelength-division multiplexed (WDM) transmission systems were explored. And the authors showed that while the BP gain is similar to single-carrier systems, PPRN removal can have a much stronger effect, particularly for higher order QAM systems, implying that SCM can be advantageous not only for constant modulus formats such as QPSK, but also for high spectral efficiency systems.
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
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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.