Results 11 to 20 of about 75,987 (284)
Two-Dimensional Constellation Shaping in Fiber-Optic Communications
Applied Sciences, 2019 Constellation shaping has been widely used in optical communication systems. We review recent advances in two-dimensional constellation shaping technologies for fiber-optic communications. The system architectures that are discussed include probabilistic
Zhen Qu +2 more
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Optimal Probabilistic Constellation Shaping for Covert Communications
IEEE Transactions on Information Forensics and Security, 2022 In this paper, we investigate the optimal probabilistic constellation shaping design for covert communication systems from a practical view. Different from conventional covert communications with equiprobable constellations modulation, we propose nonequiprobable constellations modulation schemes to further enhance the covert rate.
Shuai Ma +8 more
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Probabilistic Constellation Shaping for Optical Fiber Communications [PDF]
Journal of Lightwave Technology, 2019 We review probabilistic constellation shaping (PCS), which has been a key enabler for several recent record-setting optical fiber communications experiments. PCS provides both fine-grained rate adaptability and energy efficiency (sensitivity) gains. We discuss the reasons for the fundamentally better performance of PCS over other constellation shaping ...
Junho Cho, Peter J. Winzer
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Constellation shaping for IEEE 802.11 [PDF]
2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2017 A constellation shaping scheme is proposed. The motivation is to decrease the required transmit power for a specified spectral efficiency. Instead of imposing a non-uniform distribution on the constellation or using nonuniformly spaced symbols, a sphere constraint is employed on the n-dimensional signal space.
Gultekin, Y.C. +3 more
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Photonics, 2022 As a typical high-order modulation format optimization technology, constellation probability shaping enhances generalized mutual information (GMI) by optimizing the probability distribution of each constellation point of the signal.
Yao Zhang +3 more
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Shaping Multidimensional Signal Constellations [PDF]
Proceedings. 1991 IEEE International Symposium on Information Theory, 2005 Consider an optimally shaped N-dimensional (N even) signal constellation on a lattice. Assuming continuous approxima- tion, the boundary of the two-dimensional subconstellations is a cir- cle and the boundary of the whole constellation is a hypersphere.
A.K. Khandani, P. Kabal
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IEEE Access, 2023 A novel concept for single wavelength high spectral-efficient multi-dimensional optical transmission with geometric and probabilistic constellation shaping and bit mapping technique is presented in this study.
Jinwoo Park +3 more
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Hierarchical Distribution Matching for Probabilistic Amplitude Shaping
Entropy, 2020 Probabilistic amplitude shaping—implemented through a distribution matcher (DM)—is an effective approach to enhance the performance and the flexibility of bandwidth-efficient coded modulations. Different DM structures have been proposed in the literature.
Stella Civelli, Marco Secondini
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End-to-End Learning of Constellation Shaping for Optical Fiber Communication Systems
IEEE Photonics Journal, 2023 End-to-end learning based on autoencoder can realize robust constellation shaping for optical fiber communications. The existing schemes use the symbol-wise autoencoder (SAE) or bit-wise autoencoder (BAE) to realize the constellation shaping.
Wenshan Jiang +7 more
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Optimization of Probabilistic Shaping for Nonlinear Fiber Channels with Non-Gaussian Noise
Entropy, 2020 Probabilistic constellation shaping is investigated in the context of nonlinear fiber optic communication channels. Based on a general framework, different link types are considered—1. dispersion-managed channels, 2.
Henrik Enggaard Hansen +3 more
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