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
Probabilistic amplitude shaping for continuous-variable quantum key distribution with discrete modulation
TL;DR: In this article , a probabilistic amplitude shaping of a set of symbols allows to approximate at will the optimal channel capacity also for increasing average powers in continuous-variable quantum key distribution (CV-QKD) protocols.
Proceedings ArticleDOI
Probabilistic Shaping and its Applications for Optical Communications
TL;DR: The invention of probabilistic amplitude shaping (PAS), which concatenates a shaping outer code called a distribution matcher (DM) and a forward error correction (FEC) inner code, has three properties that distinguishes it from other proposed PS schemes.
Journal ArticleDOI
Probabilistic shaping 16 quadrature amplitude modulation scheme based on trellis-coded modulation for short-reach optical communication
Zhang Zongyu,Qi Zhang,Xishuo Wang,Xiangjun Xin,Ran Gao,Hongxin Zhang,Jianxin Ren,Xiangyu Wu,Xing Xu,Qinghua Tian,Feng Tian,Huan Chang +11 more
TL;DR: A probabilistic shaping 16 quadrature amplitude modulation (PS-16QAM) scheme based on trellis-coded modulation (TCM) is proposed to provide an approach for improving TCM performance and the effective and favorable overall 16QAM constellation probability distribution is achieved.
Journal ArticleDOI
Compensation of Fiber Nonlinearities in Digital Coherent Systems Leveraging Long Short-Term Memory Neural Networks
TL;DR: The numerical results show that LSTM Neural Networks can be very efficient as post processors of optical receivers which classify data that have undergone non-linear impairments in fiber and provide superior performance compared to digital back propagation, especially in the multi-channel transmission scenario.
Journal ArticleDOI
Nonlinear coded nonuniform superposition QAM by trellis-coding for MISO system in visible light communication
TL;DR: In this article , a 36-QAM superposition modulation with uneven symbol probability by nonlinear precoding is proposed to alleviate the nonlinearity effect caused by high instantaneous power in multi-input-single-output (MISO) visible light communication system.
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.