A 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 req...A 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.Beam hopping technology provides an efficient solution to achieve the efficient use of frequency resources and power resources.At the same time,the use of beam hopping makes the beam hopping of satellite payload need to match the business signals of ground signal stations,bringing about the need for synchronization of beam hopping between satellite and ground.On the basis of analyzing the basic principles and key technologies of hopping beam,the paper analyzes the synchronization problem of satellite to ground hopping beam,proposes a signaling-assisted fast synchronization method of hopping beam for satellite to ground synchronization,and conducts simulation analysis of synchronization performance.展开更多
This work investigates the data quality issue for synchrophasor applications, and pays particular attention to synchronization signal loss and synchrophasor data loss events. First, the historical synchronization sign...This work investigates the data quality issue for synchrophasor applications, and pays particular attention to synchronization signal loss and synchrophasor data loss events. First, the historical synchronization signal loss events are analyzed and the potential reasons and solutions are discussed. Then, the scenario of a small amount of synchrophasor data loss is studied and a Lagrange interpolating polynomial method is used to adaptively estimate the incomplete and missing data. The performance of proposed method is demonstrated with simulation results.Specifically, the proposed method considers the trade-off between the estimation accuracy and the hardware cost,and could be efficiently employed in reality.展开更多
基金supported by Key Research and Development Program of Shaanxi(Program No.2022ZDLGY05-08)Application Innovation Program of CASC(No.6230107001)+2 种基金Research project on civil aerospace technology(No.D040304)Research project of CAST(No.Y23-WYHXJS-07)Research Foundation of the Key Laboratory of Spaceborne Information Intelligent Interpretation(No.2022-ZZKY-JJ-20-01).
文摘A 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.Beam hopping technology provides an efficient solution to achieve the efficient use of frequency resources and power resources.At the same time,the use of beam hopping makes the beam hopping of satellite payload need to match the business signals of ground signal stations,bringing about the need for synchronization of beam hopping between satellite and ground.On the basis of analyzing the basic principles and key technologies of hopping beam,the paper analyzes the synchronization problem of satellite to ground hopping beam,proposes a signaling-assisted fast synchronization method of hopping beam for satellite to ground synchronization,and conducts simulation analysis of synchronization performance.
基金supported in part by the U.S.National Science Foundation(U.S.NSF)through the U.S.NSF/Department of Energy(DOE)Engineering Research Center Program under Award EEC-1041877 for CURENT
文摘This work investigates the data quality issue for synchrophasor applications, and pays particular attention to synchronization signal loss and synchrophasor data loss events. First, the historical synchronization signal loss events are analyzed and the potential reasons and solutions are discussed. Then, the scenario of a small amount of synchrophasor data loss is studied and a Lagrange interpolating polynomial method is used to adaptively estimate the incomplete and missing data. The performance of proposed method is demonstrated with simulation results.Specifically, the proposed method considers the trade-off between the estimation accuracy and the hardware cost,and could be efficiently employed in reality.
