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
Point-to-Multipoint Optical Networks Using Coherent Digital Subcarriers
Dave Welch,Antonio Napoli,J. Back,Warren Sande,Joao Pedro,Fady Masoud,Chris Fludger,T. Duthel,Han Sun,Steven Joseph Hand,Ting-Kuang Chiang,Aaron Chase,Atul Mathur,Tobias A. Eriksson,Mats Plantare,Magnus Olson,Stefan Voll,Kuang-Tsan Wu +17 more
TL;DR: In this article, the authors proposed a point-to-multipoint architecture based on digital subcarrier multiplexing (DQMCM) to enable interoperability across a variety of transceivers operating at different speeds.
Proceedings ArticleDOI
132-Gb/s Photonics-Aided Single-Carrier Wireless Terahertz-Wave Signal Transmission at 450GHz Enabled by 64QAM Modulation and Probabilistic Shaping
Xinying Li,Jianjun Yu,Li Zhao,Wen Zhou,Kaihui Wang,Miao Kong,Gee-Kung Chang,Ying Zhang,Xiaolong Pan,Xiangjun Xin +9 more
TL;DR: This work experimentally demonstrates 132-Gb/s (12-Gbaud) photonics-aided single-carrier PDM-64QAM-PS5.5 THz-wave signal transmission at 450GHz over 20-km fiber-optics and 1.8-m wireless distance with BER under 4×10−2.
Journal ArticleDOI
Information Rates of Next-Generation Long-Haul Optical Fiber Systems Using Coded Modulation
TL;DR: It is shown that, somewhat unexpectedly, schemes based on nonbinary HD codes can achieve information rates comparable to SD decoders and that, when SD is used, switching from a symbol-wise to a bit-wise decoder results in a negligible penalty.
Journal ArticleDOI
A Study on the Effect of Ultra-Wide Band WDM on Optical Transmission Systems
Okamoto Seiji,Kyo Minoguchi,Fukutaro Hamaoka,Kengo Horikoshi,Matsushita Asuka,Masanori Nakamura,Etsushi Yamazaki,Yoshiaki Kisaka +7 more
TL;DR: In this article, the authors proposed a scheme for allocating wavelength adaptive modulation to exhaustively use wavelength dependent optical signal-to-noise ratio (OSNR) for UWB WDM systems.
Journal ArticleDOI
Approaching the Capacity of Colored-SNR Optical Channels by Multicarrier Entropy Loading
Di Che,William Shieh +1 more
TL;DR: The optimum power allocation that determines the capacity of colored-SNR Gaussian channels is reviewed, and entropy loading based on multicarrier modulation that offers a theoretically optimum strategy to approach the capacity is proposed.
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.