Showing 221 - 240 results of 2,648 for search '"satellites"', query time: 0.07s Refine Results
  1. 221

    Fairness based channel borrowing strategy for multimedia LEO satellite communications by HUANG Fei, XU Hui, WU Shi-qi

    Published 2006-01-01
    Subjects: “…multimedia LEO satellite communications…”
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    Medium‐Energy Electron Detector Onboard the FY‐3E Satellite by Yu‐Guang Ye, Jia‐Wei Li, Cong Huang, Hong Zou, Qiu‐Gang Zong, Xiao‐Xin Zhang, Jin‐Song Wang, Ying Liu, Yong‐Fu Wang, Xiang‐Qian Yu, Wei‐Hong Shi, Hong‐Fei Chen, Ji‐Qing Zou, Wei‐Ying Zhong, Jia‐Li Chen, Xiang‐Hong Jia, Bo Wang, Si‐Pei Shao

    Published 2023-03-01
    “…Abstract The Medium‐Energy Electron Detector (MEED), a space weather monitoring instrument on the Fengyun‐3E (FY‐3E) satellite, is introduced in this paper. The MEED utilizes pin‐hole imaging technology on low‐orbit satellites for medium‐energy electron detection. …”
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    Turbo iterative acquisition algorithm for satellite high-mobility DSSS signal by Chunxiao JIANG, Jiawei WANG

    Published 2021-08-01
    “…To solve the problems of the low acquisition probability and high computational complexity in satellite high-mobility communications, a new factor graph was designed for acquisition of the high-mobility direct sequence spread spectrum (DSSS) signal, where time-varying Doppler rates were modeled by the random walk model.Based on the proposed factor graph, the turbo iterative DSSS signal acquisition algorithm was proposed.In the Doppler-estimation loop, the negative influence of Doppler frequency offsets and Doppler rates could be eliminated effectively.Then in the code-detection loop, constraints of each chip was used to recover the received signal, to achieve DSSS signal acquisition.Simulation results show that the proposed algorithm is capable of improving the acquisition performance at less 1.3 dB with low computational complexity.…”
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    Small Satellite Mission Concepts for Space Weather Research and as Pathfinders for Operations by Amir Caspi, M. Barthelemy, C. D. Bussy‐Virat, I. J. Cohen, C. E. DeForest, D. R. Jackson, A. Vourlidas, T. Nieves‐Chinchilla

    Published 2022-02-01
    “…Abstract Recent advances in miniaturization and commercial availability of critical satellite subsystems and detector technology have made small satellites (SmallSats, including CubeSats) an attractive, low‐cost potential solution for space weather research and operational needs. …”
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    Space Object Detection in Video Satellite Images Using Motion Information by Xueyang Zhang, Junhua Xiang, Yulin Zhang

    Published 2017-01-01
    “…In this paper, space object detection in a video satellite image with star image background is studied. …”
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    Research on Simulation Technology in High and Low Orbit Hybrid Satellite Network by Zhihao WANG, Xiaoguang LANG, Shuangai XIAO

    Published 2020-09-01
    Subjects: “…high and low orbit hybrid satellite network…”
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    Article
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    Assessing the impacts of satellite tagging on growth rates of immature hawksbill turtles by Holly J. Stokes, Kimberley L. Stokes, Jeanne A. Mortimer, Jacques‐Olivier Laloë, Nicole Esteban, Graeme C. Hays

    Published 2025-01-01
    “…We assessed the impact of satellite tagging on sea turtles at a foraging site in the Indian Ocean. …”
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    Article