Journal ArticleDOI
Rate Adaptation and Reach Increase by Probabilistically Shaped 64-QAM: An Experimental Demonstration
Reads0
Chats0
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
More filters
Journal ArticleDOI
128 GSa/s SiGe DAC Implementation Enabling 1.52 Tb/s Single Carrier Transmission
Fred Buchali,Vahid Aref,Roman Dischler,Mathieu Chagnon,Karsten Schuh,Horst Hettrich,Anna Bielik,Lars Altenhain,Markus Guntermann,Rolf Schmid,Michael Moller +10 more
TL;DR: A new 128 GSa/s SiGe digital to analog converter (DAC) having 8 bit physical resolution and 24 GHz 3-dB bandwidth is reported and its architecture and the results on fundamental converter assessment are presented.
Proceedings ArticleDOI
Universal Hybrid Probabilistic-geometric Shaping Based on Two-dimensional Distribution Matchers
TL;DR: It is experimentally demonstrated that the performance of 32-ary QAM, based on hybrid probabilistic-geometric shaping, is superior to probabilistically shaped 32QAM and regular 32 QAM.
Journal ArticleDOI
Analysis and Experimental Demonstration of Orthant-Symmetric Four-dimensional 7 bit/4D-sym Modulation for Optical Fiber Communication
Bin Chen,Alex Alvarado,Sjoerd van der Heide,Menno van den Hout,Hartmut Hafermann,Chigo Okonkwo +5 more
TL;DR: Numerical simulations show that 4D-OS128 outperforms two well-studied 4D geometrically-shaped modulation formats: 128SP-16QAM and 7b4D-2A8PSK by up to 0.65 dB for bit-interleaved coded modulation at the same spectral efficiency.
Journal ArticleDOI
Performance Enhancement of Probabilistically Shaped OFDM Enabled by Precoding Technique in an IM-DD System
TL;DR: Experimental results demonstrate that constant amplitude zero autocorrelation sequence (CAZAC) precode can offer optimal performance compared to orthogonal circulant transform (OCT) precoding and discrete Fourier transform spread (DFT-spread) in terms of increasing generalized mutual information (GMI) and reducing PAPR.
Proceedings ArticleDOI
Blind Polarization Demultiplexing and Equalization of Probabilistically Shaped QAM
TL;DR: A novel, two-stage algorithm for polarization demultiplexing and equalization of probabilistically shaped QAM is presented, requiring no knowledge of the channel or transmitted sequence.
References
More filters
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.