Results 31 to 40 of about 152,793 (295)

Evaluating musical software using conceptual metaphors [PDF]

, 2009
An open challenge for interaction designers is to find ways of designing software to enhance the ability of novices to perform tasks that normally require specialized domain expertise.
Holland, Simon, Mulholland, Paul, Wilkie, Katie   +2 more
core   +1 more source

A Simple Joint Modulation Format Identification and OSNR Monitoring Scheme for IMDD OOFDM Transceivers Using K-Nearest Neighbor Algorithm

Applied Sciences, 2019
In this study, a joint modulation format identification and optical signal-to-noise ratio (OSNR) monitoring algorithm is proposed and experimentally demonstrated using the k-nearest neighbor algorithm for intensity modulation and direct detection (IMDD ...
Qianwu Zhang, Hai Zhou, Yuntong Jiang, Bingyao Cao, Yingchun Li, Yingxiong Song, Jian Chen, Junjie Zhang, Min Wang   +8 more
doaj   +1 more source

Linear Regression vs. Deep Learning for Signal Quality Monitoring in Coherent Optical Systems

IEEE Photonics Journal, 2022
Error vector magnitude (EVM) is a metric for assessing the quality of m-ary quadrature amplitude modulation (mQAM) signals. Recently proposed deep learning techniques, e.g., feedforward neural networks (FFNNs) -based EVM estimation scheme leverage fast ...
Yuchuan Fan, Xiaodan Pang, Aleksejs Udalcovs, Carlos Natalino, Lu Zhang, Sandis Spolitis, Vjaceslavs Bobrovs, Richard Schatz, Xianbin Yu, Marija Furdek, Sergei Popov, Oskars Ozolins   +11 more
doaj   +1 more source

Development of high-speed directly-modulated DFB and DBR lasers with surface gratings [PDF]

, 2011
The conventional distributed feedback and distributed Bragg reflector edge-emitting lasers employ buried gratings, which require two or more epitaxial growth steps.
Afzal, S., Bardella, Paolo, Dumitrescu, M., Eisenstein, G., Gready, D., Kamp, M., Karinen, J., Laakso, A., Melanen, P., Montrosset, Ivo, Parillaud, O., Reithmaier J.-P., Sek, G., Telkkälä, J., Uusimaa, P., Vallone, Marco Ernesto, Viheriälä, J.   +16 more
core   +1 more source

Models for discriminating image blur from loss of contrast [PDF]

, 2020
Observers can discriminate between blurry and low-contrast images (Morgan, 2017). Wang and Simoncelli (2004) demonstrated that a code for blur is inherent to the phase relationships between localized pattern detectors of different scale.
Morgan, M. J., Solomon, J. A.
core   +1 more source

Joint Modulation Format Identification and Frequency Offset Estimation Based on Superimposed LFM Signal and FrFT

IEEE Photonics Journal, 2019
We propose a novel technique for joint modulation format identification and frequency offset (FO) estimation. The linear frequency modulation signal which is obtained by a direct current signal and Fractional Fourier Transform (FrFT) is superimposed on ...
Yuxiao Guo, Muguang Wang, Yaozu Li, Hongqian Mu, Beilei Wu, Yan Liu, Fengping Yan   +6 more
doaj   +1 more source

Optical Performance Monitoring Method Based on Fine-grained Constellation Diagram Recognition [PDF]

Jisuanji kexue, 2023
In optic fiber communication,traditional optical performance monitoring(OPM) mainly relies on analyzing the time-frequency domain information of the signal.However,conventional methods cannot complete multi-task joint monitoring,so they are less flexible.
CHEN Jinjie, HE Chao, XIAO Xiao, LEI Yinjie
doaj   +1 more source

Joint Modulation Format Identification and OSNR Monitoring Using Cascaded Neural Network With Transfer Learning

IEEE Photonics Journal, 2021
We propose a cascaded neural network (NN) to simultaneously identify the modulation formats and monitor the optical-signal-to-noise ratio (OSNR). In the second-level network, it is a single deep NN (DNN) rather than multiple sub-networks, which makes the
Jing Zhang, Yuanjian Li, Shaohua Hu, Wanting Zhang, Zhiquan Wan, Zhenming Yu, Kun Qiu   +6 more
doaj   +1 more source

On suitable codes for frame synchronisation in packet radio LANs [PDF]

, 1994
Standardisation bodies in Europe and North America are currently developing standards for high data rate packet radio LANs. Radio LANs will have two main applications: wired LAN replacement and ad-hoc networking.
Barton, SK, Beach, MA, Johnson, IR, Jones, AE, Marvill, JD, Mu, L, Nix, AR, Wilkinson, TA   +7 more
core   +2 more sources

AUTOMATIC RECOGNITION OF BOTH INTER AND INTRA CLASSES OF DIGITAL MODULATED SIGNALS USING ARTIFICIAL NEURAL NETWORK [PDF]

Journal of Engineering Science and Technology, 2014
In radio communication systems, signal modulation format recognition is a significant characteristic used in radio signal monitoring and identification. Over the past few decades, modulation formats have become increasingly complex, which has led to the ...
JIDE JULIUS POPOOLA
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