Showing 181 - 200 results of 511 for search '"broadband"', query time: 0.05s Refine Results
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    Method of connection establishment between CPE and the cloud platform by UFengchao FU, Yuanbao XIE

    Published 2016-12-01
    Subjects: “…broadband access network…”
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    Simulation and analysis of software defined cognitive frequency hopping multi beam satellite system by Heng-zhi LI, Chun-feng WANG

    Published 2017-11-01
    “…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 dynamically adjusted according to the change of the traffic flow.Beam hopping for multi-beam broadband satellite network system has been proposed to improve the traditional multi-beam broadband satellite network system performance,whose principle is to assign different beams to different time slots,rather than the allocation of bandwidth,so that in each time slot,the entire available bandwidth is allocated to each beam,and the time window is periodically applied to the beam selection system ,in the full band hopping mode,the band can be selected optimally in the duration of each beam to meet user transmission bandwidth and delay requirements.With the development of cognitive radio technology,cognitive beam hopping for multi-beam satellite system can further improve the efficiency of spectrum utilization,to meet the growing shortage of spectrum resources,to achieve large-capacity high-bandwidth broadband satellite network system,and to support the rising user service capacity and the transmission efficiency of user services under different load conditions.In addition,software definition technology is also used in satellite networks,which could achieve effective management of satellite resources to improve the utilization of satellite resources.In this paper,the principle of software-defined cognitive hopping multi-beam broadband satellite network system is discussed.The spectrum utilization efficiency and throughput are analyzed,which can be used as a reference for broadband satellite network system design.…”
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    Theory of Multimode Squeezed Light Generation in Lossy Media by Denis A. Kopylov, Torsten Meier, Polina R. Sharapova

    Published 2025-02-01
    “…Studying the mode structure, we demonstrate that in a lossy environment no broadband basis without quadrature correlations between the different broadband modes exists. …”
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    Freeway intelligent transportation oriented wireless access technologies evaluation by Shang-jing LIN, Jin TIAN, Jin-hong LI

    Published 2017-12-01
    “…The popularization of broadband mobile communication technology has paved a way for the development of intelligent transportation industry.At the meantime,the intelligent transportation system (ITS) has also put forward higher requirements for the broadband mobile communication technologies.Based on the summary of the challenges faced by the broadband mobile communication technologies when applied to ITS,two typical expressway communication scenarios are selected in which the performance of wireless access technologies are evaluated and compared.It can provide theoretical reference for the development of ITS.…”
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    National key information infrastructure:status,international comparison and policy recommedations by Sude QING, Yang SONG, Li ZHAO, Lei CAO

    Published 2017-08-01
    “…2015 is the year when “the 12th Five-year Plan” fully completed,and “the 13th Five-year Plan” starts.To discover problems,judge trends and solve problems are the top priorities in the first year of planning.According to“Global Information Technology Report 2015”that released by World Economic Forum,China is also facing three weaknesses,such as the low per capita internet bandwidth,the limited mobile broadband penetration and the urgent need of innovation environment.Situation analysis and international comparison were presented,and policy recommendations were given from three major aspects,such as improving broadband capabilities,developing Aerospace integrated networks and innovative application environments,which break down into six sub-directions such as domestic broadband networks,international network layout,mobile communications,space infrastructure,application infrastructure and software-defined network.…”
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    Fault Identification of Low-Speed Hub Bearing of Crane Based on MBMD and BP Neural Network by Li-Hong Guo, Lai-Ming Yang, Yan-Feng Peng, Yong Guo

    Published 2022-01-01
    “…The main idea of the broadband mode decomposition (BMD) method previously proposed is to search in the association dictionary library containing broadband and narrowband signals. …”
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