Results 1 to 10 of about 78,267 (285)

Seeing your error alters my pointing: observing systematic pointing errors induces sensori-motor after-effects. [PDF]

open access: yesPLoS ONE, 2011
During the procedure of prism adaptation, subjects execute pointing movements to visual targets under a lateral optical displacement: as consequence of the discrepancy between visual and proprioceptive inputs, their visuo-motor activity is characterized ...
Roberta Ronchi   +4 more
doaj   +5 more sources

Performance Analysis of MIMO-mQAM System with Pointing Errors and Beam Spreading in Underwater Málaga Turbulence Channel

open access: yesJournal of Marine Science and Engineering, 2023
Both the long-term beam spreading caused by ocean turbulence and the pointing errors induced by the jitter of transmitters and receivers degrade the performance of underwater wireless optical communication (UWOC) links.
Jianying Wang   +3 more
doaj   +4 more sources

The pointing errors in optic ataxia reveal the role of “peripheral magnification” of the PPC [PDF]

open access: yesFrontiers in Integrative Neuroscience, 2016
Interaction with visual objects in the environment requires an accurate correspondence between visual space and its internal representation within the brain.
Philippe Vindras   +5 more
doaj   +3 more sources

Using Allan Variance Based Semi-Parameter Model to Calibrate Pointing Errors of Alt-az Telescopes

open access: yesApplied Sciences, 2018
In this paper, a new model called Allan variance based semi-parameter model is put forward to improve the pointing precision for alt-az telescopes.
Lingjie Yan, Yongmei Huang, Yahui Zhang
doaj   +4 more sources

Signal Quality Assessment for Transdermal Optical Wireless Communications under Pointing Errors

open access: yesTechnologies, 2018
In this paper, we assess the signal quality of the out-body to in-body optical communication link, which can be used as a fundamental enabler of novel biomedical appliances, such as medical implants, as well as biological and chemical components ...
Stylianos E. Trevlakis   +2 more
doaj   +4 more sources

Performance Analysis of Relay-Aided Hybrid FSO/RF Cooperation Communication System over the Generalized Turbulence Channels with Pointing Errors and Nakagami-m Fading Channels [PDF]

open access: yesSensors, 2023
To improve the performance of fee-space optical communication systems, this paper analyzes the performance of a relay-aided hybrid fee-space optical (FSO)/radio frequency (RF) cooperation system based on a selective combination and decoding forward ...
Yan Wu, Gang Li, Dejin Kong
doaj   +2 more sources

Single-Layer Phase Screen With Pointing Errors for Free Space Optical Communication

open access: yesIEEE Access, 2021
Single-layer phase screen is a classical, simple and accurate approach for simulating the optical field under turbulence, and it is generally used in free space optical communication (FSOC).
Xin Liu   +4 more
doaj   +3 more sources

A Simplified Pointing Model for Alt-Az Telescopes

open access: yesApplied Sciences, 2023
The telescope pointing model plays a crucial role in characterizing and explaining the inaccuracies in the telescope’s pointing. It uses mathematical models to express these errors and suggests methods to calibrate and rectify them.
Yong Zhao   +5 more
doaj   +2 more sources

Performance analysis of optical wireless communications with aperture averaging over exponentiated Weibull turbulence with pointing errors

open access: yesResults in Optics, 2021
Aperture averaging (AA) is a potential technique to reduce the effect of atmospheric turbulence in optical wireless communications (OWC). Although there is significant research on point-like detectors, there is a gap in the study on the analytical ...
Ziyaur Rahman   +2 more
doaj   +3 more sources

Pointing-Error Correction of Optical Communication Terminals on Motion Platforms Based on a K-Nearest Neighbor Algorithm

open access: yesIEEE Photonics Journal, 2022
High-precision pointing is a key technology in free-space optical communication, as it improves the acquisition probability and reduces the acquisition time.
Chao Peng   +7 more
doaj   +1 more source

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