Results 31 to 40 of about 77,307 (275)
Multicarrier Faster-Than-Nyquist Based on Efficient Implementation and Probabilistic Shaping
IEEE Access, 2021 The conventional multicarrier faster-than-Nyquist (MFTN) achieves the spectral efficiency (SE) gain by deep compression. However, deep compression leads to severe intersymbol interference (ISI) or intercarrier interference (ICI).
Hui Che, Kun Zhu, Yong Bai
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IEEE Access, 2020 A $5\times60$ Gb/s low-density parity-check (LDPC) coded WDM-PON using 8-level pulse amplitude modulation (PAM8) signals with probabilistic shaping (PS) over 20-km standard single-mode fiber (SSMF) with direct detection is proposed and experimentally ...
Lin Zhou +5 more
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Performance of probabilistic amplitude shaping with BICM‐ID
Electronics Letters, 2021 It is numerically shown that bit error rate (BER) performance of probabilistic amplitude shaping (PAS) applying a bit‐to‐symbol mapping of non‐Gray natural binary code assigned to 64‐quadrature amplitude modulation is significantly improved by bit ...
Akira Naka
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Flexible Probabilistic Shaping PON Based on Ladder-Type Probability Model
IEEE Access, 2020 We firstly propose a novel flexible multi-rate passive optical network (PON) employing ladder-type probabilistic shaping (PS) to enable adjustable and flexible multi-rate access without changing the modulation formats.
Ying Zhang +4 more
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A Simple Nonlinearity-Tailored Probabilistic Shaping Distribution for Square QAM [PDF]
, 2017 A new probabilistic shaping distribution that outperforms Maxwell-Boltzmann is studied for the nonlinear fiber channel. Additional gains of 0.1 bit/symbol MI or 0.2 dB SNR for both DP-256QAM and DP-1024QAM are reported after 200 km nonlinear fiber ...
Alvarado, Alex +8 more
core +2 more sources
Joint Shaping of Geometry and Probability based on Mutual Information Neural Estimation
Guangtongxin yanjiu, 2022 In view of the problem that quadrature amplitude modulation has 1.53 dB capacity gap at the Shannon limit in high signal noise ratio, the paper proposes a joint shaping method of geometry and probability based on mutual information neural estimation ...
Jia-xi LIANG +3 more
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On the Probabilistic Shaping and Geometric Shaping in Optical Communication Systems
IEEE Access, 2019 We introduce and compare typical shaping schemes suitable for optical communications. The geometrically shaped-quadrature amplitude modulation (GS-QAM) formats are characterized by the non-equidistant spacing of constellation points, transmitted ...
Zhen Qu, Ivan B. Djordjevic
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Protograph-Based LDPC Code Design for Shaped Bit-Metric Decoding [PDF]
, 2015 A protograph-based low-density parity-check (LDPC) code design technique for bandwidth-efficient coded modulation is presented. The approach jointly optimizes the LDPC code node degrees and the mapping of the coded bits to the bit-interleaved coded ...
Böcherer, Georg +2 more
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Resolving clustered worms via probabilistic shape models [PDF]
2010 IEEE International Symposium on Biomedical Imaging: From Nano to Macro, 2010 The roundworm Caenorhabditis elegans is an effective model system for biological processes such as immunity, behavior, and metabolism. Robotic sample preparation together with automated microscopy and image analysis has recently enabled high-throughput screening experiments using C. elegans.
Wahlby, Carolina +6 more
openaire +3 more sources
Adaptive Probabilistic Shaping Using Polar Codes for FSO Communication
IEEE Photonics Journal, 2022 An adaptive polar coded probabilistic shaping scheme for free-space optical (FSO) communication is proposed and demonstrated to improve transmission performance.
Xiaoyu Liu +4 more
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