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Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems [PDF]
IEEE Photonics Technology Letters, 2015 Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 dB and 0.8 dB are demonstrated in back-to-back experiments by shaping of 16QAM and 64QAM ...
Alvarado, Alex +5 more
core +6 more sources
Designand Implementation of a Novel Wideband HF Communication System Based on NC-OFDM and Probabilistic Shaping [PDF]
SensorsThis paper proposes a novel wideband high-frequency (HF) communication system supporting video transmission based on non-contiguous orthogonal frequency division multiplexing (NC-OFDM) and probabilistic shaping (PS).
Rifei Yang, Yong Bai, Zhuhua Hu
doaj +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
doaj +3 more sources
TPC1 – SV Channels Gain Shape [PDF]
Molecular Plant, 2011 The most prominent ion channel localized in plant vacuoles is the slow activating SV type. Slow vacuolar (SV) channels were discovered by patch clamp studies as early as 1986. In the following two decades, numerous studies revealed that these calcium- and voltage-activated, nonselective cation channels are expressed in the vacuoles of all plants and ...
Hedrich, Rainer, Marten, Irene
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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
doaj +1 more source
Discrimination of Gain Increments in Speech-Shaped Noises [PDF]
Trends in Hearing, 2019 Frequency-dependent gain adjustments are routine in hearing-aid fittings, whether in matching to real-ear targets or fine-tuning to patient feedback. Patient feedback may be unreliable and fittings inefficient if adjustments are not discriminable. To examine what gain adjustments are discriminable, we measured the just-noticeable differences (JNDs ...
Benjamin Caswell-Midwinter +1 more
openaire +4 more sources
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
doaj +1 more source
Hybrid Constellation Shaping 64QAM Based on Hexagonal Lattice of Constellation Subset
Photonics, 2023 Increasing demand for higher-speed and large-capacity data communications has driven the development of constellation shaping technology. This paper proposes a hybrid constellation shaping scheme for 64-quadrature amplitude modulation (64QAM) based on ...
Xiangyu Liu +7 more
doaj +1 more source
Adaptive Bit-Labeling Design for Probabilistic Shaping Based on Residual Source Redundancy
Entropy, 2023 By using the residual source redundancy to achieve the shaping gain, a joint source-channel coded modulation (JSCCM) system has been proposed as a new solution for probabilistic amplitude shaping (PAS).
Chen Chen +3 more
doaj +1 more source
On the Nonlinear Shaping Gain With Probabilistic Shaping and Carrier Phase Recovery
Journal of Lightwave Technology, 2023 The performance of different probabilistic amplitude shaping (PAS) techniques in the nonlinear regime is investigated, highlighting its dependence on the PAS block length and the interaction with carrier phase recovery (CPR). Different PAS implementations are considered, based on different distribution matching (DM) techniques-namely, sphere shaping ...
Stella Civelli +3 more
openaire +3 more sources