Results 11 to 20 of about 2,688,437 (267)
A Fast and High-Precision Satellite-Ground Synchronization Technology in Satellite Beam Hopping Communication [PDF]
Space: Science & TechnologyA key requirement for future multibeam broadband satellite communication systems is the ability to flexibly adjust beam capacity according to changes in business distribution, in order to meet time-varying business requirements.
Tengfei Hui +6 more
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IEEE Transactions on Wireless CommunicationsBeam-hopping (BH) technology, integral to multi-beam satellite systems, adapts beam activation to the variable communication demands of terrestrial users.
Symeon Chatzinotas, Lei Lei, Lin Chen
exaly +2 more sources
Blind Joint Soft-Detection Assisted Slow Frequency-Hopping Multicarrier DS-CDMA [PDF]
, 2000 A novel multiple-access scheme based on slow frequency-hopping multicarrier direct-sequence, code-division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrow-band ...
Yang, L-L., Hanzo, L.
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Power Allocation Technology of Long Time Multi-Star Hopping Beam for LEO Satellite
天地一体化信息网络, 2023 LEO satellites have superior development prospects due to their low cost, low latency and small path loss, and are widely used in IoT, B5G and other fields.For the LEO satellite and its coverage area will be in a moving state, a convex optimization-based
Ziyi LIU, Xiaoning ZHANG, Zesong FEI
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Multi-satellite cooperative beam hopping resource allocation based on interference perception
Dianxin kexue, 2023 Beam hopping (BH) technology is one of effective ways to solve limitation of beam resources and enhance the system coverage ability of low earth orbit (LEO) satellite systems.Existing research typically considers beam hopping resource allocation for a ...
Jinlong HU +6 more
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Beam Hopping Beam Optimization and Resource Allocation Algorithm Based on Phased Array
天地一体化信息网络, 2022 Beam hopping technology can provide enough fl exibility and high resource utilization for satellite communication system, and shows good performance in broadband satellite communication system.However, the existing beam planning scheme of beam hopping ...
Mengting HAO, Chen ZHANG, Gengxin ZHANG
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Multi-group frequency hopping OFDMA based on statistical multiplexing [PDF]
, 2008 In this paper, the multi-group frequency hopping OFDMA (MG-FH OFDMA) based on the statistical multiplexing is proposed for the downlink cellular system. Compared with the existed random frequency hopping OFDMA (RFH-OFDMA) system utilizing the statistical
Su, Xinghui +9 more
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Bit error simulation of DQPSK for a slow frequency hopping CDMA system in mobile radio communications [PDF]
, 1995 Spread spectrum (SS) techniques seem to be an attractive alternative to conventional narrow-band modulation. In this paper a frequency hopping (FH) system model based on slow FH (SFH) is proposed.
Mortazavi, SH +3 more
core +1 more source
Applied Sciences, 2023 By introducing the arrayed waveguide router (AWGR) optical true time-delay (OTTD) architecture in bent-pipe satellite optical inter-link to optically assist the RF phased array in Low-earth orbit satellites will extend the multi-hop bent-pipe satellite ...
Shiyi Xia +7 more
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Optimization Method of Dynamic Beam Position for LEO Beam-Hopping Satellite Communication Systems
IEEE Access, 2021 The beam-hopping (BH) technology applied to low earth orbit (LEO) satellite communication networks is a superior choice, but the long transmission delay partly caused by data packets waiting in the queue of satellite transponders will seriously affect ...
Jingyu Tang +4 more
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