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
Fiber-optic transmission and networking: the previous 20 and the next 20 years [Invited]
TL;DR: Focusing on the optical transport and switching layer, aspects of large-scale spatial multiplexing, massive opto-electronic arrays and holistic optics-electronics-DSP integration, as well as optical node architectures for switching and multiplexed of spatial and spectral superchannels are covered.
Journal ArticleDOI
Performance Comparison of PS Star-16QAM and PS Square-Shaped 16QAM (Square-16QAM)
TL;DR: The star-shaped 16-ary quadrature amplitude modulation scheme shows superiority over the PS-Square-16QAM in terms of the BER improvement.
Journal ArticleDOI
On Probabilistic Shaping of Quadrature Amplitude Modulation for the Nonlinear Fiber Channel
TL;DR: In this paper, the effect of using a small number of input probability mass functions (PMFs) for a range of signal-to-noise ratios (SNRs), instead of optimizing the constellation shaping for each SNR, was investigated.
Journal ArticleDOI
800G DSP ASIC Design Using Probabilistic Shaping and Digital Sub-Carrier Multiplexing
Han Sun,Mehdi Torbatian,Mehdi Karimi,Robert Maher,Sandy Thomson,Mohsen Nader Tehrani,Yuliang Gao,Ales Kumpera,George Soliman,Aditya Kakkar,Mohammad Osman,Ziad A. El-Sahn,Clayton Doggart,Weikun Hou,Shailesh Sutarwala,Yuejian Wu,Mohammad Reza Chitgarha,Vikrant Lal,Huan-Shang Tsai,Scott Corzine,Jiaming Zhang,J. Osenbach,S. Buggaveeti,Zulfikar Morbi,Miguel Iglesias Olmedo,I. Leung,Xian Xu,Parmijit Samra,Vince Dominic,Steve Sanders,Mehrdad Ziari,Antonio Napoli,Bernhard Spinnler,Kuang-Tsan Wu,Parthiban Kandappan +34 more
TL;DR: This manuscript discusses the motivations for jointly utilizing transmission techniques such as probabilistic shaping and digital sub-carrier multiplexing in digital coherent optical transmissions systems and describes the key-building blocks of modern high-speed DSP-based transponders working at up to 800G per wave.
Journal ArticleDOI
Probabilistic Shaping and Forward Error Correction for Fiber-Optic Communication Systems
TL;DR: A layered PS-FEC architecture consisting of a PS encoder and an FEC encoder is introduced, of which probabilistic amplitude shaping is a practical instance and achievable PS encoding rates and FEC decoding rates are derived using information-theoretic arguments.
References
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Journal ArticleDOI
High Spectral Efficiency 400 Gb/s Transmission Using PDM Time-Domain Hybrid 32–64 QAM and Training-Assisted Carrier Recovery
Xiang Zhou,Lynn E. Nelson,Peter Magill,R. Isaac,Benyuan Zhu,D. W. Peckham,P. Borel,K. Carlson +7 more
TL;DR: In this article, the authors reported the successful transmission of ten 494.85 Gbit/s DWDM signals on the standard 50 GHz ITU-T grid over 32 × 100 km of ultra-large-area (ULA) fiber.
Journal ArticleDOI
Constellation Shaping for Fiber-Optic Channels With QAM and High Spectral Efficiency
TL;DR: The simulations suggest that major improvements can be expected in the achievable rates of optical networks with high-order QAM, and a mapping function for turbo-coded bit-interleaved coded modulation is proposed based on optimization of the mutual information between the channel input and output.
Journal ArticleDOI
Spatially Coupled Soft-Decision Error Correction for Future Lightwave Systems
TL;DR: This paper discusses and presents some recent advances in the field of error correcting codes and discusses their applicability for lightwave transmission systems, and shows how rapidly decodable codes can be constructed by careful selection of the degree distribution.
Proceedings ArticleDOI
Approaching capacity with asymptotically regular LDPC codes
TL;DR: A family of protograph based LDPC codes that can be derived from permutation matrix based regular (J,K) LDPC convolutional codes by termination by exhibiting a threshold improvement that gets stronger with increasing node degrees and does not decay as L increases is presented.
Journal ArticleDOI
A coding scheme for m-out-of-n codes
TL;DR: A scheme for the construction of m-out-of-n codes based on the arithmetic coding technique is described, which allows theConstruction of optimal or nearly optimal m- out- of-N codes for a wide range of block sizes limited only by the arithmetic precision used.