Results 21 to 30 of about 59,853 (261)

Spectrally-efficient 17.6-Tb/s DWDM optical transmission system over 678 km with pre-filtering analysis

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications
We present and analyze a 17.6-Tb/s DWDM optical transmission composed of 79 channels with 224-Gb/s RZ-DP-16QAM modulation format per-channel and coherent detection.
L. H. H. Carvalho   +7 more
doaj   +3 more sources

Unsupervised Neural Network for Modulation Format Discrimination and Identification

open access: yesIEEE Access, 2019
We propose a new method to discriminate and identify the modulation format of signals based on an unsupervised neural network named convolutional Gaussian-Bernoulli restricted Boltzmann machine (CGBRBM).
Zihan Yang   +6 more
doaj   +1 more source

Modulation Format Identification in a Satellite to Ground Optical Wireless Communication Systems Using a Convolution Neural Network

open access: yesApplied Sciences, 2022
The satellite-to-ground communication system is a significant part of future space communication networks. The free-space optical (FSO) communication technique is a prospective solution for satellite-to-ground communication.
Yucong Gu   +5 more
doaj   +1 more source

Eight-Dimensional Polarization-Ring-Switching Modulation Formats [PDF]

open access: yesIEEE Photonics Technology Letters, 2019
We propose two 8-dimensional (8D) modulation formats (8D-2048PRS-T1 and 8D-2048PRS-T2) with a spectral efficiency of 5.5 bit/4D-sym, where the 8 dimensions are obtained from two time slots and two polarizations. Both formats provide a higher tolerance to nonlinearity by selecting symbols with nonidentical states of polarization (SOPs) in two time slots.
Chen, Bin   +3 more
openaire   +3 more sources

Research on Modulation Format Recognition Algorithm based on Machine Learning

open access: yesGuangtongxin yanjiu, 2022
In order to meet the communication needs of the new era, the new generation communication network should have the characteristics of faster speed, larger capacity and wider coverage.
JIN Rui-zhe, CHI Nan
doaj   +3 more sources

ResGatNet: Bridging Efficiency and Precision in Low-SNR Wireless Perception

open access: yesIEEE Access
Modulation recognition in low signal-to-noise ratio (SNR) environments poses significant challenges for existing deep learning models, particularly those based on the Vision Transformer (ViT).
Wangye Jiang   +5 more
doaj   +1 more source

Performance Investigation of Modulation Format Identification in Super-Channel Optical Networks

open access: yesIEEE Photonics Journal, 2022
The problem of automatic modulation format identification (MFI) is one of the main challenges in adaptive optical systems. In this work, we investigate MFI in super-channel optical networks.
Waddah S. Saif   +5 more
doaj   +1 more source

A Modulation Format Identification Method Based on Information Entropy Analysis of Received Optical Communication Signal

open access: yesIEEE Access, 2019
Modulation format identification is an important part of optical performance monitoring in elastic optical networks. We propose a modulation format identification scheme based on the information entropy analysis of received optical communication signal ...
Zhao Zhao, Aiying Yang, Peng Guo
doaj   +1 more source

TAF7L modulates brown adipose tissue formation

open access: yeseLife, 2014
Brown adipose tissue (BAT) plays an essential role in metabolic homeostasis by dissipating energy via thermogenesis through uncoupling protein 1 (UCP1). Previously, we reported that the TATA-binding protein associated factor 7L (TAF7L) is an important regulator of white adipose tissue (WAT) differentiation. In this study, we show that TAF7L also serves
Haiying Zhou   +4 more
openaire   +3 more sources

Blind Modulation Format Identification Using the DC Component

open access: yesIEEE Photonics Journal, 2019
We propose a blind modulation format identification (MFI) method based on direct-current (DC) component for coherent receivers. The DC value is affected by the distributions of received signal's modulated phase and amplitude. A monitoring factor R
Qingzhao Tan, Aiying Yang, Peng Guo
doaj   +1 more source

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