Resource Allocation for LEO Beam-Hopping Satellites in a Spectrum Sharing Scenario
IEEE Access, 2021 In recent years, low earth orbit (LEO) satellite constellation systems have been developed rapidly. However, the scarcity of satellite spectrum resources has become one of the major obstacles to this trend.
Jingyu Tang +4 more
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Time-slot allocation algorithm for LEO satellite beam hopping based on non-stationary MAB
Tongxin xuebao, 2023 Aiming at the problem of inadequate adaptation to dynamic changes in cell services in the resource allocation algorithm for hopping beams in low earth orbit (LEO) satellite systems, a time-slot allocation algorithm for LEO satellite beam hopping based on
Min LIN +4 more
doaj +2 more sources
Resource Allocation of Multi-Satellite Beam Hopping Technology Based on System Capacity Maximization
天地一体化信息网络, 2022 Unlike medium and high earth orbit satellites, LEO satellites have the characteristics of small path loss, low propagation delay and high deployment fl exibility.LEO satellites are widely used in real time services, global internet of things, emergency ...
Qing SHU, Xiaoning ZHANG, Zesong FEI
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Millisecond Spin Relaxation Times of Distinct Electron and Hole Subensembles in MA<sub>x</sub>FA<sub>1-x</sub>PbI<sub>3</sub> Perovskite Crystals. [PDF]
Adv Sci (Weinh)Mixed‐cation MAx${\rm MA}_x$ FA1−x${\rm FA}_{1-x}$ PbI3${\rm PbI}_3$ perovskite crystals reveal multiple discrete electron and hole spin subensembles associated with distinct localization environments. Optically detected magnetic resonance combined with resonant spin inertia uncovers carriers spin relaxation times reaching 2 ms and identifies nuclear ...
Hu R +6 more
europepmc +2 more sources
IEEE Photonics Journal, 2017 We propose and demonstrate a novel method to generate multispectrum frequency and hopping from one frequency spectrum to another using a single external cavity based Fabry–Pérot laser diode (FP-LD) subjected to a single optical injection ...
Bikash Nakarmi +4 more
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Optimization Method for Full Bandwidth Beam Hopping Pattern Based on Clustering [PDF]
Jisuanji gongcheng, 2020 To solve the problem of the interference in the full bandwidth Beam Hopping(BH) satellite communication system,this paper proposes a BH pattern optimization method based on beam clustering.Slot allocation is made according to the proportion of each beam ...
WANG Yaxin, BIAN Dongming, HU Jing, TANG Jingyu, WANG Chuang
doaj +1 more source
Joint Beam Hopping and Carrier Aggregation in High Throughput Multibeam Satellite Systems
IEEE Access, 2022 Beam hopping (BH) and carrier aggregation (CA) are two promising technologies for the next generation satellite communication systems to achieve several orders of magnitude increase in system capacity and to significantly improve the spectral efficiency.
Mirza Golam Kibria +4 more
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Demand-Aware Beam Hopping and Power Allocation for Load Balancing in Digital Twin Empowered LEO Satellite Networks [PDF]
IEEE Transactions on Wireless CommunicationsLow-Earth orbit (LEO) satellites utilizing beam hopping (BH) technology offer extensive coverage, low latency, high bandwidth, and significant flexibility.
Ruili Zhao +4 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch +3 more
wiley +1 more source
Simulation and analysis of software defined cognitive frequency hopping multi beam satellite system
Tongxin xuebao, 2017 Traditional multi-beam satellites cannot adapt to the changing traffic because of the fixed bandwidth and cannot adjust dynamically for the traffic load.In the future,the multi-beam broadband satellite system must have great flexibility and can be ...
Heng-zhi LI, Chun-feng WANG
doaj +2 more sources