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
On the Nonlinear Shaping Gain with Probabilistic Shaping and Carrier Phase Recovery
TL;DR: In this paper , the performance of different probabilistic amplitude shaping (PAS)techniques in the nonlinear regime is investigated, highlighting its dependence on the PAS block length and the interaction with carrier phase recovery (CPR).
Book ChapterDOI
A Novel Algorithm for Reconfigurable Architecture for Software-Defined Radio Receiver on Baseband Processor for Demodulation
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3.61 Pbit/s S, C, and L-Band Transmission With 19-Core Single-Mode Fiber
Xu Zhang,Honglin Ji,Min Lu,Qingyu He,Chao Yang,Jie Li,Wu Liu,Chao-Jun Li,Qing Wang,Zichen Liu,Chuyu Peng,Huang Yu,Zhixue He,Xi Xiao,Shaohua Yu +14 more
TL;DR: In this paper , a 3.61 Pbit/s generalized mutual information (GMI) estimated throughput by SDM and WDM combined transmission over 19-core single-mode fiber is demonstrated.
Journal ArticleDOI
Scalable filterless coherent point-to-multipoint metro network architecture
Joao Pedro,Tobias A. Eriksson,M. Sezer Erkilinc,Amin Yekani,Farshad Farzadfar,Andrew Feber,Kristina Klimova,Marylynn Salmon,Yonggang Fan,Christophe Luzi,University of California Museum of Paleontology,Jochen Beyer,Mika Shimizu,Rodríguez-López, Jorge,Piotr Kowalczyk,Kristin M Braun,José Carlos Mattos Pereira +16 more
TL;DR: In this paper , 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
On Optimum Enumerative Sphere Shaping Blocklength at Different Symbol Rates for the Nonlinear Fiber Channel
TL;DR: In this paper , a 0.9 dB SNR improvement can be obtained via short-blocklength enumerative sphere shaping for single-span transmission at 56 GBd, which vanishes for higher symbol rates and a larger number of spans.
References
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Book
Information Theory and Reliable Communication
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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.