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381
Nuclear fragmentation cross section measurements with the FOOT experiment
Published 2023-01-01“…On the radioprotection side, the interest in long-term manned space missions beyond Low Earth Orbit is growing in these years but it has to cope with significant health concerns from radiation in space, necessitating an accurate cross section data description. …”
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382
Performance analysis of DSSS- and CSS-based physical layer for IoT transmission over LEO satellites
Published 2022-08-01“…To determine a suitable waveform for Internet of Things (IoT) transmission over low-Earth orbit (LEO) satellites, this paper reports the results of a performance comparison between chirp spread spectrum (CSS)-based LoRa and direct sequence spread spectrum (DSSS)-based Ingenu. …”
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383
Key Generation Method Based on Multi-Satellite Cooperation and Random Perturbation
Published 2021-12-01“…In low-earth-orbit (LEO) satellite-to-ground communication, the size of satellite antennae is limited and the satellite motion trajectory is predictable, which makes the channel state information (CSI) of the satellite-to-ground channel easy to leak and impossible to use to generate a physical layer key. …”
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384
Complex MIMO RBF Neural Networks for Transmitter Beamforming over Nonlinear Channels
Published 2020-01-01“…The use of beamforming for efficient transmission has already been successfully implemented in practical systems and is absolutely necessary to even further increase spectral and energy efficiencies in some configurations of the next-generation wireless systems and for low earth orbit satellites. A remarkable capacity increase is then achieved and spectral congestion is minimized. …”
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385
A Distributed Formation Joint Network Navigation and Positioning Algorithm
Published 2022-05-01“…In view of the problem that the leader-follower joint navigation scheme relies too much on the absolute navigation and positioning accuracy of the leader node, under the conditions of distributed network-centric warfare (NCW) and to meet the location service accuracy, reliability, and synergy efficiency of the future integrated communication, navigation (ICN), we built a joint navigation and positioning system with low Earth orbit (LEO), airborne data link, and inertial navigation system (INS) as the core; designed a ranging and time-synchronization scheme of the joint navigation and positioning system; and established a joint navigation and positioning method for formation and networking based on mutual ranging and velocity measurement information between aircrafts. …”
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386
Efficient Resource Allocation for Beam-Hopping-Based Multi-Satellite Communication Systems
Published 2023-05-01“…With the rapid growth of data traffic, low earth orbit (LEO) satellite communication networks have gradually ushered in a new trend of development due to its advantages of low latency, wide coverage, and high capacity. …”
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387
RSOnet: An Image-Processing Framework for a Dual-Purpose Star Tracker as an Opportunistic Space Surveillance Sensor
Published 2022-07-01“…Novel data collection regimes are needed to scale our ability to detect, track, classify and characterize resident space objects in a crowded low Earth orbit. This research presents RSOnet, an image-processing framework for space domain awareness using star trackers. …”
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388
Design and Fabrication of Broad-Beam Microstrip Antenna Using Parasitic Patches and Cavity-Backed Slot Coupling
Published 2022-02-01“…In particular, this realizing antenna covers the low earth orbit (LEO) satellite beam.…”
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389
Proposed Orbital Products for Positioning Using Mega-Constellation LEO Satellites
Published 2020-10-01“…With thousands of low Earth orbit (LEO) satellites to be launched in the near future, LEO mega-constellations are supposed to significantly change the positioning and navigation service for ground users. …”
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390
Traffic simulation of broadband LEO constellation satellite communication system
Published 2019-03-01“…Due to the rapid development of small satellite technology,and the advantages of low earth orbit satellite(LEO) with low delay and low propagation loss as compared with the traditional geosynchronous orbit satellite(GEO), the broadband LEO constellation satellite communication system has gradually become one of the most important hot spots in the field of satellite communications. …”
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391
Satellite-Assisted Disrupted Communications: IoT Case Study
Published 2023-12-01“…This study explored the utility of Low-Earth Orbit (LEO) satellite constellations as a communication infrastructure for interconnecting “smart” devices via ground stations in Internet of Things (IoT) scenarios. …”
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392
Comparison between Different Re-Entry Technologies for Debris Mitigation in LEO
Published 2022-10-01“…The population of satellites in Low Earth Orbit is predicted to growth exponentially in the next decade due to the proliferation of small-sat constellations. …”
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393
Micro Satellite Orbital Boost by Electrodynamic Tethers
Published 2021-07-01“…The spacecraft-tether system dynamics in low Earth orbit are simulated to evaluate the effects of Lorentz force and torques on translational motion. …”
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394
Design and Implementation of LEO-5G Downlink Synchronization Algorithm based on FPGA
Published 2022-04-01“…In response to the urgent need for the development of low-orbit 5th Generation Mobile Networks (5G) protocol standards, R16 protocol standards and terminal baseband chips based on 5G low-orbit broadband satellite communication systems, a Primary Synchronization Signal (PSS) detection algorithm of " two blocks combined and divided into two cross-correlation" is proposed for coarse frequency offset estimation based on the analysis of the Low Earth Orbit (LEO)-5G system's PBCH link structure and downlink time-frequency synchronization overall architecture. …”
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395
Inter-Satellite Link Channel Management For Mobile Satellite Systems
Published 2003“…Low Earth Orbit (LEO) satellite constellations are foreseen as appropriate alternatives to the geostationary satellite systems for providing global personal communications services (PCS). …”
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396
Experimental Investigation of the Electrical Wiring Configuration of the HK40 Hall Thruster Operation
Published 2023-10-01“… Vacuum chambers providing a low pressure environment similar to the vacuum environment in low earth orbit have been used for the testing of plasma thrusters. …”
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397
Towards Client Selection in Satellite Federated Learning
Published 2024-02-01“…Large-scale low Earth orbit (LEO) remote satellite constellations have become a brand new, massive source of space data. …”
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398
LoRaWAN CubeSat with an Adaptive Data Rate: An Experimental Analysis of Path Loss Link Margin
Published 2023-01-01“…Long Range (LoRa) is one of the most practical technologies due to its low-power and long-range capabilities to be used by the Low Earth Orbit (LEO) CubeSat. This study aims to evaluate the performance of the Long Range Wide Area Network (LoRaWAN) in receiving uplink messages from ground sensor nodes at an altitude of 550 km with a maximum elevation angle of 0°. …”
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399
Analysis of Orbital Lifetime Prediction Parameters in Preparation for Post-Mission Disposal
Published 2015-12-01“…Atmospheric drag force is an important source of perturbation of Low Earth Orbit (LEO) orbit satellites, and solar activity is a major factor for changes in atmospheric density. …”
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400
Establishing the Capabilities of the Murchison Widefield Array as a Passive Radar for the Surveillance of Space
Published 2022-05-01“…The results demonstrate the Murchison Widefield Array is able to provide widefield and persistent coverage of objects in low Earth orbit.…”
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