Results 101 to 110 of about 165,363 (243)
Performance analysis of multi-GNSS static and RTK techniques in estimating height differences
International Journal of Digital Earth, 2020 Establishing reliable elevation differences is imperative for most geoscience and engineering applications. This work has traditionally been accomplished through spirit leveling techniques; however, surveyors have been utilizing satellite positioning ...
Ahmed Elaksher +4 more
doaj +1 more source
Anti-Multipath Orthogonal Chirp Division Multiplexing for Underwater Acoustic Communication
IEEE Access, 2020 Multipath due to reflections of the sea surface, seabed, and obstacles, as well as inhomogeneity within the ocean, is an important characteristic of underwater acoustic channels. Mutual interference among multiple paths causes severe amplitude fading and
Peibin Zhu +4 more
semanticscholar +1 more source
Sensors, 2010 For monitoring burst events in a kind of reactive wireless sensor networks (WSNs), a multipath routing protocol (MRP) based on dynamic clustering and ant colony optimization (ACO) is proposed..
Jing Yang, Mai Xu, Wei Zhao, Baoguo Xu
doaj +1 more source
IEEE Access, 2020 Sidelobe raising, caused by multipath and multiple-access interference (MAI), hinders the signal detection and time-delay estimation of multicarrier code-division multiple-access (MC-CDMA) signals, which are crucial for localization and tracking ...
Yuyao Shen, Ying Xu
doaj +1 more source
Cooperative multipath assisted positioning
, 2021 Das Kennen des eigenen Standorts ist zu einem wichtigen Aspekt in unserem modernen Leben geworden. In Umgebungen mit guter Sicht in den Himmel können globale Satellitennavigationssysteme sehr genaue Positionsschätzungen liefern. Wenn die Sicht auf den Himmel blockiert ist, nimmt die Genauigkeit dieser Schätzungen rapide ab.
openaire +2 more sources
International Endodontic Journal, EarlyView.ABSTRACT Aim This study evaluated the effect of a short, personalised training session on student performance in using an artificial intelligence (AI)‐based platform for pulp exposure prediction before caries excavation and determined the required sample size for a further randomised controlled trial (RCT).
Shaqayeq Ramezanzade +5 more
wiley +1 more source
GPS Multipath Analysis Using Fresnel Zones
Sensors, 2018 GNSS (Global Navigation Satellite Systems) multipath has been subject to scientific research for decades and although numerous methods and techniques have already been developed to mitigate this effect, it is still one of the accuracy-limiting factors in
Florian Zimmermann +3 more
doaj +1 more source
Timestamp Estimation in P802.15.4z Amendment
Sensors, 2020 Due to the known issue that the ranging in the 802.15.4™-2015 standard is prone to external attacks, the enhanced impulse radio (EiR), a new amendment still under development, advances the secure ranging protocol by encryption of physical layer (PHY ...
Ioan Domuta +3 more
doaj +1 more source
Temporal and spatial combining for 5G mmWave small cells [PDF]
, 2017 This chapter proposes the combination of temporal processing through Rake combining based on direct sequence-spread spectrum (DS-SS), and multiple antenna beamforming or antenna spatial diversity as a possible physical layer access technique for fifth ...
Imran, Muhammad Ali, Muirhead, David
core
Energy Efficient Multipath Routing Protocol for Mobile Ad-Hoc Network Using the Fitness Function
IEEE Access, 2017 Mobile ad hoc network (MANET) is a collection of wireless mobile nodes that dynamically form a temporary network without the reliance of any infrastructure or central administration.
Aqeel Taha +4 more
semanticscholar +1 more source