Results 1 to 10 of about 4,644,594 (299)

A New Perspective on Assessing Cognition in Children through Estimating Shared Intentionality

open access: yesJournal of Intelligence, 2022
This theoretical article aims to create a conceptual framework for future research on digital methods for assessing cognition in children through estimating shared intentionality, different from assessing through behavioral markers.
Igor Val Danilov, Sandra Mihailova
doaj   +1 more source

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

open access: yesIEEE 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   +6 more
doaj   +1 more source

High Accuracy and Low Complexity Frequency Offset Estimation Method Based on All Phase FFT for M-QAM Coherent Optical Systems

open access: yesIEEE Photonics Journal, 2022
The traditional fast Fourier transform based frequency offset estimation (FFT-FOE) estimates the frequency offset by searching the spectral peak of the signal after the fourth power operation, which is suitable for multiple modulation formats.
Qian Li   +3 more
doaj   +1 more source

Flexible Phase Synchronization for Wireless Optical Coherent Communication System With Adaptive Fractionally-Spaced Blind Equalization Combined With Adaptive Kalman Filter

open access: yesIEEE Photonics Journal, 2023
Wireless optical coherent communication can be used as the backbone supporting technology of air-space-ground-sea-integrated network. In wireless optical coherent communication, the information can be demodulated from the carrier correctly only when the ...
ShuPeng Zhang, LiYing Tan, Jing Ma
doaj   +1 more source

Monolithically Integrated O-Band Coherent ROSA Featuring 2D Grating Couplers for Self-Homodyne Intra Data Center Links

open access: yesIEEE Photonics Journal, 2023
In this work, we present an O-band dual-polarization coherent receiver optical sub-assembly (cROSA), monolithically integrated in a 0.25 $\mu$m BiCMOS technology.
Pascal M. Seiler   +7 more
doaj   +1 more source

Bidirectional coherent classical communication [PDF]

open access: yesQuantum Information and Computation, 2005
A unitary interaction coupling two parties enables quantum or classical communication in both the forward and backward directions. Each communication capacity can be thought of as a tradeoff between the achievable rates of specific types of forward and backward communication.
Harrow, Aram W., Leung, Debbie W.
openaire   +4 more sources

Coherent communication with linear optics [PDF]

open access: yesPhysical Review A, 2008
We show how to implement several continuous-variable coherent protocols with linear optics. Noise can accumulate when implementing each coherent protocol with realistic optical devices. Our analysis bounds the level of noise accumulation. We highlight the connection between a coherent channel and a nonlocal quantum nondemolition interaction and give ...
Wilde, Mark M.   +3 more
openaire   +2 more sources

Adaptive EKF Based Estimation Method for Phase Noise in CO-OFDM/OQAM System

open access: yesIEEE Access, 2020
Recently, dynamic optical network has attracted wide concern for its high efficiency and flexible configurations. Known for high spectral efficiency and flexible allocations of frequency resources orthogonal frequency-division multiplexing offset ...
Xiaobo Wang   +4 more
doaj   +1 more source

Multi-Carrier Coherent Receiver Based on a Shared Optical Hybrid and a Cyclic AWG Array for Terabit/s Optical Transmission

open access: yesIEEE Photonics Journal, 2010
We describe a multi-carrier coherent-receiver scheme where the coherent beating between an ultra-high-speed multi-carrier signal and multiple optical local oscillators (OLOs) is conducted in a single optical hybrid, followed by carrier separation through
Xiang Liu   +11 more
doaj   +1 more source

Communication through coherent control of quantum channels [PDF]

open access: yesQuantum, 2020
A completely depolarising quantum channel always outputs a fully mixed state and thus cannot transmit any information. In a recent Letter\cite{ebler18}, it was however shown that if a quantum state passes through two such channels in a quantum ...
Alastair A. Abbott   +4 more
doaj   +1 more source

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