The problems associated with using typical free-space optics (FSO) transceivers for multipoint communications on flight platforms, such as satellites and unmanned aerial vehicles, in a cluster are discussed and the transceivers are found to be unsuitable for concurrent multipoint communications in those platforms. To overcome the problems, a multipoint FSO system design is proposed. The design of the multipoint system is described and the performance of the multipoint receiver is evaluated in terms of receive gain under different conditions. The proposed multipoint system design offers a promising way to implement concurrent multipoint communications on flight platforms with power, weight, and size advantages compared to the use of multiple transceivers.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/AO.49.000258 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Deep-learning-based extraction of circle of Willis topology with anatomical priors.
Sci Rep
December 2024
Department of Applied Mathematics, Technical Medical Centre, University of Twente, Enschede, The Netherlands.
The circle of Willis (CoW) is a circular arrangement of arteries in the human brain, exhibiting significant anatomical variability. The CoW is extensively studied in relation to neurovascular pathologies, with certain anatomical variants previously linked to ischemic stroke and intracranial aneurysms. In an individual CoW, arteries might be absent (aplasia) or underdeveloped (hypoplasia, diameter < 1 mm).
View Article and Find Full Text PDFPhotovoltaic module dataset for automated fault detection and analysis in large photovoltaic systems using photovoltaic module fault detection.
Data Brief
December 2024
Department of Computer Systems Engineering, Faculty of Information and Communication Technology, Tshwane University of Technology, South Africa.
Solar energy has become the fastest growing renewable and alternative source of energy. However, there is little or no open-source datasets to advance research knowledge in photovoltaic related systems. The work presented in this article is a step towards deriving Photo-Voltaic Module Dataset (PVMD) of thermal images and ensuring they are publicly available.
View Article and Find Full Text PDFA versatile real-time vision-led runway localisation system for enhanced autonomy.
Front Robot AI
December 2024
School of Electrical and Electronic Engineering, University of Sheffield, Sheffield, United Kingdom.
This paper proposes a solution to the challenging task of autonomously landing Unmanned Aerial Vehicles (UAVs). An onboard computer vision module integrates the vision system with the ground control communication and video server connection. The vision platform performs feature extraction using the Speeded Up Robust Features (SURF), followed by fast Structured Forests edge detection and then smoothing with a Kalman filter for accurate runway sidelines prediction.
View Article and Find Full Text PDFFacial Expression Perception and Psychological Changes During Space Analogs.
Aerosp Med Hum Perform
December 2024
Introduction: Facial expression perception is the process by which someone can interpret the emotion of another individual using their facial cues. Below-average scores on tests designed to measure facial expression recognition (FER) accuracies are associated with inappropriate behavioral responses and are often linked to mental or neurological disorders. Head-down bed rest microgravity analog studies show changes in facial emotion processing that may indicate a behavioral health risk during spaceflight.
View Article and Find Full Text PDFA systematic narrative review of the involvement of executive functions in flying performance of pilots.
Front Neuroergon
December 2024
Fédération ENAC ISAE-SUPAERO ONERA, Université de Toulouse, Toulouse, France.
Piloting is a complex task that demands robust cognitive functions to handle multiple tasks simultaneously in a constantly changing environment. As a result, cognitive abilities, particularly executive functions (EFs), have gained significant importance in relation to flight performance. However, the specific EFs most critical for predicting flight performance remain unclear.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!