437 Hits in 5.9 sec

Low-cost Retina-like Robotic Lidars Based on Incommensurable Scanning [article]

Zheng Liu, Fu Zhang, Xiaoping Hong
2020 arXiv   pre-print
The smallest alignment accuracy is defined as the minimum tolerable displacement to best align the PLD and APD so that angularly the emitter beam maximally overlaps with the receiving beam.  ...  In comparison, camera-only systems will not be able to detect the UAV distance and the complete trajectory.  ...  Compared with mean coordinate, the median coordinate we use is more robust to outlier points in . 3) Tracking algorithm Algorithm 2 summarizes our detection and tracking algorithms.  ... 
arXiv:2006.11034v1 fatcat:j7q7fbjtbvaafmm5lrxozbbfwe

On-Board GNSS/IMU Assisted Feature Extraction and Matching for Oblique UAV Images

San Jiang, Wanshou Jiang
2017 Remote Sensing  
Then, feature matching can be achieved through searching the nearest point with the smallest Euclidean distance between two descriptor sets.  ...  of high costs of accurate miniature IMU sensors and maximum overload limitations of most UAVs on the market [7] .  ...  To use oblique UAV images for different scenarios with success, accurate camera poses are mandatorily required.  ... 
doi:10.3390/rs9080813 fatcat:b5k5b4kbzbasziv2aa3voif6wq

On the Application of Machine Learning to the Design of UAV-Based 5G Radio Access Networks

Vahid Kouhdaragh, Francesco Verde, Giacinto Gelli, Jamshid Abouei
2020 Electronics  
To this aim, a cost-effective and flexible strategy consists of complementing terrestrial RANs with unmanned aerial vehicles (UAVs).  ...  However, several problems must be solved in order to effectively deploy such UAV-based RANs (U-RANs).  ...  Knowing the number of UAVs, the altitude of each UAV from the ground can be easily computed in order to cover the area with minimum overlap, in the cases where the UAVs are equally distributed in the area  ... 
doi:10.3390/electronics9040689 fatcat:q6bab7cmnjgh3ntkpovdshd7tm

Heterogeneous Ground and Air Platforms, Homogeneous Sensing: Team CSIRO Data61's Approach to the DARPA Subterranean Challenge

Nicolas Hudson, Fletcher Talbot, Mark Cox, Jason Williams, Thomas Hines, Alex Pitt, Brett Wood, Dennis Frousheger, Katrina Lo Surdo, Thomas Molnar, Ryan Steindl, Matt Wildie (+22 others)
2022 Field Robotics  
and an Emesent Hovermap UAV, supplemented by smaller tracked or legged ground robots.  ...  The ground agents use a common CatPack perception module, which allowed reuse of the perception and autonomy stack across all ground agents with minimal adaptation.  ...  Artifact detections are not tracked on the UAV, and were less accurate than the UGV system at the Urban event with a 2.34 m RMS error for reported artifacts.  ... 
doi:10.55417/fr.2022021 fatcat:deuieb32d5f23pokkw2awod57i

A Survey on UAV-Aided Maritime Communications: Deployment Considerations, Applications, and Future Challenges [article]

Nikolaos Nomikos, Panagiotis K. Gkonis, Petros S. Bithas, Panagiotis Trakadas
2022 arXiv   pre-print
More specifically, relevant UAV-based network architectures are discussed together with the role of their building blocks.  ...  Moreover, as UAVs are characterized by flexible deployment with high re-positioning capabilities, studies on UAV trajectory optimization for maritime applications are thoroughly discussed.  ...  to provide efficient network coverage and network lifetime maximization to avoid potential outage especially in long distances from terrestrial networks.  ... 
arXiv:2209.09605v1 fatcat:ksss63y6zje6fpykbov35d2fw4

Fleets of robots for environmentally-safe pest control in agriculture

Pablo Gonzalez-de-Santos, Angela Ribeiro, Cesar Fernandez-Quintanilla, Francisca Lopez-Granados, Michael Brandstoetter, Slobodanka Tomic, Stefania Pedrazzi, Andrea Peruzzi, Gonzalo Pajares, George Kaplanis, Manuel Perez-Ruiz, Constantino Valero (+4 others)
2016 Precision Agriculture  
take-off PWC Physical-weed-control ROI Region of interest RS-232 Recommended standard 232 RTK Real time kinematics SIL Safety integrity level TCP/UDP Transmission control protocol/user datagram protocol UAV  ...  Maximizing the distance during the operation of the UAV turned out to be essential to reduce the stress of the operator.  ...  but also maximizes the distance between them during the flights.  ... 
doi:10.1007/s11119-016-9476-3 fatcat:kuqplcc6o5hvneoevvksbj5era

Unmanned Aerial Vehicles (UAVs): A Survey on Civil Applications and Key Research Challenges

Hazim Shakhatreh, Ahmad H. Sawalmeh, Ala Al-Fuqaha, Zuochao Dou, Eyad Almaita, Issa Khalil, Noor Shamsiah Othman, Abdallah Khreishah, Mohsen Guizani
2019 IEEE Access  
Civil infrastructure is expected to dominate the more that 45 Billion market value of UAV usage. In this survey, we present UAV civil applications and their challenges.  ...  Smart UAVs are the next big revolution in UAV technology promising to provide new opportunities in different applications, especially in civil infrastructure in terms of reduced risks and lower cost.  ...  ) Load transportation and deployment with single and multiple UAVs; and (5) People tracking.  ... 
doi:10.1109/access.2019.2909530 fatcat:xgknpyuqazhpvferjkkdohxmtu

A Survey on Millimeter-Wave Beamforming Enabled UAV Communications and Networking [article]

Zhenyu Xiao, Lipeng Zhu, Yanming Liu, Pengfei Yi, Rui Zhang, Xiang-Gen Xia, Robert Schober
2021 arXiv   pre-print
Subsequently, the technologies and solutions for UAV-connected mmWave cellular networks and mmWave-UAV ad hoc networks are reviewed, respectively.  ...  Unmanned aerial vehicles (UAVs) have found widespread commercial, civilian, and military applications. Wireless communication has always been one of the core technologies for UAV.  ...  Thus, UEs with low-correlation channels or beams without overlap can communicate concurrently with the UAV AP via SDMA, while UEs with highly correlated channels or overlapping beams may communicate with  ... 
arXiv:2104.09204v2 fatcat:rbywt5p7uzhhzg3hbc7tnln45q

A Survey on Machine-Learning Techniques for UAV-Based Communications

Petros S Bithas, Emmanouel T Michailidis, Nikolaos Nomikos, Demosthenes Vouyioukas, Athanasios G Kanatas
2019 Sensors  
Unmanned aerial vehicles (UAVs) will be an integral part of the next generation wireless communication networks.  ...  In this context, the machine-learning (ML) framework is expected to provide solutions for the various problems that have already been identified when UAVs are used for communication purposes.  ...  In UAV swarm mission-critical scenarios, each UAV should detect and track the other swarm members in order to acquire information regarding the relative distance and bearing.  ... 
doi:10.3390/s19235170 pmid:31779133 pmcid:PMC6929112 fatcat:pnur7lmpj5bj7poebmdfpd6bhi

Applications of Unmanned Aerial Vehicles in Cryosphere: Latest Advances and Prospects

Clare Gaffey, Anshuman Bhardwaj
2020 Remote Sensing  
UAVs are adaptable to various cryospheric research needs in terms of providing flexibility with data acquisition windows, revisits, data/sensor types (multispectral, hyperspectral, microwave, thermal/night  ...  imaging, Light Detection and Ranging (LiDAR), and photogrammetric stereos), viewing angles, flying altitudes, and overlap dimensions.  ...  Acknowledgments: We would like to thank Karen Frey who provided great support with the initiation of the review paper and the reviewers who provided feedback that strengthened the review in its final form  ... 
doi:10.3390/rs12060948 fatcat:m5jnwe6zkvgcvhhh6wckcigbdm

Programming and Deployment of Autonomous Swarms using Multi-Agent Reinforcement Learning [article]

Jayson Boubin, Codi Burley, Peida Han, Bowen Li, Barry Porter, Christopher Stewart
2021 arXiv   pre-print
Compared to individual AS, our swarms achieved speedup of 4.4X using 4 UAV and 62X using 130 video cameras.  ...  We developed swarms for unmanned aerial vehicles (UAV) in agriculture and for video analytics on urban traffic.  ...  For our crop scouting UAV example, many or all sensed SSVs from a mission may be needed to build an accurate yield map.  ... 
arXiv:2105.10605v1 fatcat:xddio3i75bg73ng4p2u4vqirei

Artificial Intelligence for UAV-Enabled Wireless Networks: A Survey

Mohamed-Amine Lahmeri, Mustafa A. Kishk, Mohamed-Slim Alouini
2021 IEEE Open Journal of the Communications Society  
Their mobility and their ability to establish line of sight (LOS) links with the users made them key solutions for many potential applications.  ...  In this article, we provide a comprehensive overview of some potential applications of AI in UAV-based networks.  ...  The second method is based on the KNN algorithm applied to the FFT and measures the average distance with the target.  ... 
doi:10.1109/ojcoms.2021.3075201 fatcat:4q6cl2sz7nha5mijm6fmomv3fi

Intelligent Knowledge Distribution: Constrained-Action POMDPs for Resource-Aware Multi-Agent Communication [article]

Michael C. Fowler and T. Charles Clancy and Ryan K. Williams
2019 arXiv   pre-print
Finally, the CA-POMDP and IKD concepts are validated using an asset tracking problem where multiple unmanned aerial vehicles (UAVs) with heterogeneous sensors collaborate to localize a ground asset to  ...  Communication requirements for multi-agent systems can be rather high when an accurate picture of the environment and the state of other agents must be maintained.  ...  Model Formulation Due to size, weight, and power (SWAP) restrictions of the UAVs, they are assumed to have heterogeneous sensors with overlapping sensor support.  ... 
arXiv:1903.03086v1 fatcat:jo2kweuyg5ftpgjqr4pproulzm

Biologically inspired trajectory generation for swarming UAVs using topological distances

Gonzalo A. Garcia, Shawn S. Keshmiri
2016 Aerospace Science and Technology  
Each vehicle is provided with a decentralized agent-based robust nonlinear model predictive controller and a set of nonlinear guidance laws for trajectory tracking.  ...  This paper presents a trajectory generation logic for a swarm of unmanned aerial vehicles which uses topological distances instead of metric values.  ...  ACKNOWLEDGMENT This work was completed with funding from the Paul G.  ... 
doi:10.1016/j.ast.2016.04.028 fatcat:nqk6o4jjwrg5rngzdlkxdlghaq

A Comprehensive Survey on Aerial Mobile Edge Computing: Challenges, State-of-the-Art, and Future Directions [article]

Zhengyu Song, Xintong Qin, Yuanyuan Hao, Tianwei Hou, Jun Wang, Xin Sun
2022 arXiv   pre-print
In this paper, we provide a comprehensive survey on the UAV-enabled aerial MEC. Firstly, the related advantages and research challenges for aerial MEC are discussed.  ...  Thus, the UAV-enabled aerial MEC is believed as a win-win solution to facilitate cost-effective and energy-saving communication and computation services in various environments.  ...  UAV from a farther distance.  ... 
arXiv:2208.13965v1 fatcat:rglkodmjsve2fbncmmyatqos6y
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