Results 31 to 40 of about 18,409 (254)
Multi-Ground Station Collaborative Measurement and Control Technology for Giant Constellation System
天地一体化信息网络, 2023 Measurement and control technology is the key technology to ensure the effi cient operation, maintenance and management of the constellation system.In recent years, with the continuous expansion of the constellation scale, mega-constellation system has ...
Yang LIU +5 more
doaj +2 more sources
Research on Satellite Selection Strategy for Receiver Autonomous Integrity Monitoring Applications
Remote Sensing, 2021 Satellite selection is an effective way to overcome the challenges for the processing capability and channel limitation of the receivers due to superabundant satellites in view.
Huibin Wang +4 more
doaj +1 more source
Intelligent Load Balancing Algorithm of Mega Constellation
天地一体化信息网络, 2023 To overcome the local traffic congestion caused by the huge number of satellites in mega-constellation, a load balancing algorithm based on multi-agent deep reinforcement learning was proposed.Firstly, the satellites in the mega constellation were ...
Shuxin LUO +3 more
doaj +2 more sources
Sensors, 2018 Vehicles driving in urban canyons are always confronted with a degraded Global Navigation Satellite System (GNSS) signal environment. The surrounding obstacles may cause signal reflections or blockages, which lead to large multipath noises and ...
Wei Li +4 more
doaj +1 more source
Map-Assisted Constellation Design for mmWave WDM With OAM in Short-Range LOS Environment
IEEE Open Journal of the Communications Society, 2023 We consider a system that integrates positioning and single-user millimeter wave (mmWave) communication, where the communication part adopts wavelength division multiplexing (WDM) and orbital angular momentum (OAM).
Yuan Wang +3 more
doaj +1 more source
An Efficient Codebook Design for Uplink SCMA
IEEE Access, 2020 Sparse code multiple access (SCMA) is one of the most intensively investigated non-orthogonal multiple access (NOMA) techniques for the fifth generation communication (5G) system. In this paper, a new multi-stage optimization approach for codebook design
Mengyao Gao +3 more
doaj +1 more source
Fast Multiple Fault Detection and Exclusion (FM-FDE) Algorithm for Standalone GNSS Receivers
IEEE Open Journal of the Communications Society, 2021 Numerous applications and devices use Global Navigation Satellite System (GNSS)-provided position, velocity and time (PVT) information. However, unintentional interference and malicious attacks render GNSS-provided information unreliable.
Kewei Zhang, Panos Papadimitratos
doaj +1 more source
A novel design on multi-layer satellite constellation network
上海师范大学学报. 自然科学版, 2016 With the increasing demand of space technology,the traditional single layer satellite constellation network is restricted in the development of future space technology because of its simple structure.For this reason,more and more researchers have carried
LI Lianqiang +4 more
doaj +1 more source
L1 SFMC SBAS Message for Service Expansion of Multi-Constellation GNSS Support
IEEE Access, 2023 Currently operating satellite-based augmentation systems (SBASs) provide an augmentation service that improves global positioning system (GPS) performance at 250 bps via the L1 signal.
Cheolsoon Lim +2 more
doaj +1 more source
The human gut microbiome across the life course
FEBS Letters, EarlyView.Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero +4 more
wiley +1 more source