Space Communications最新文献_第2页

Channel modelling in complex urban environments for testing multipath mitigation methods enhanced by antenna array 用于测试天线阵列增强的多径缓解方法的复杂城市环境信道建模

Space Communications Pub Date : 2013-04-01 DOI: 10.3233/SC-130007

M. Ait-Ighil, S. Rougerie, J. Lemorton, G. Carrie, G. Artaud, C. Bourga, M. Bousquet

引用次数: 5

Simulation of radio occultation measurements 无线电掩星测量的模拟

Space Communications Pub Date : 2013-04-01 DOI: 10.3233/SC-130013

H. Benzon, S. Syndergaard

引用次数: 2

Presentation of the analysis tool for design of onboard reconfigurable antenna for broadband SatCom and broadcast services 介绍了用于宽带卫星通信和广播业务的星载可重构天线设计分析工具

Space Communications Pub Date : 2013-04-01 DOI: 10.3233/SC-130005

R. Nebuloni, L. Resteghini, C. Riva, M. Luccini, C. Capsoni, A. Martellucci, P. Gabellini

引用次数: 3

Joint results of long-term earth-space propagation experiments at 20-GHz in Canada and Europe 加拿大和欧洲20千兆赫地球空间长期传播实验联合结果

Space Communications Pub Date : 2013-04-01 DOI: 10.3233/SC-130004

C. Amaya, T. Nguyen, A. Rocha, J. Riera, A. Benarroch, P. García-del-Pino, J. García-Rubia, G. Carrie, L. Castanet, X. Boulanger

{"title":"Joint results of long-term earth-space propagation experiments at 20-GHz in Canada and Europe","authors":"C. Amaya, T. Nguyen, A. Rocha, J. Riera, A. Benarroch, P. García-del-Pino, J. García-Rubia, G. Carrie, L. Castanet, X. Boulanger","doi":"10.3233/SC-130004","DOIUrl":"https://doi.org/10.3233/SC-130004","url":null,"abstract":"Propagation effects such as rain or clouds attenuation cause deeper fades in the Ka-band than at lower frequencies. In this collaborative paper, the main results of four long-term Ka-band propagation campaigns are presented. The experiments are carried out in Ottawa, Canada; Aveiro, Portugal; Madrid, Spain; and Toulouse, France. Attenuation statistics are derived from satellite beacon data collected over 6 years at Aveiro, 5 years at Ottawa and Madrid and 2 years at Toulouse. Multi-year measurements allow the production of more stable statistics reflecting the long-term behavior of propagation phenomena and to investigate its year-to-year variability. The beacon signal data was monitored and collected on a continuous basis over the whole measurement period. After a brief introduction of the experiments, rain rate and excess attenuation results are discussed, first for a common measurement period and later for the whole database available. Seasonal attenuation statistics for Ottawa and Aveiro are compared. Finally, fade duration and fade slope statistics derived at three locations are presented and discussed.","PeriodicalId":51158,"journal":{"name":"Space Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79267737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Rain field generators implemented in a european broadcasting satellite system using an on-board reconfigurable antenna 雨场发生器在欧洲广播卫星系统中使用机载可重构天线实现

Space Communications Pub Date : 2013-04-01 DOI: 10.3233/SC-130003

C. Capsoni, L. Castanet, P. Gabellini, A. Martellucci, G. Carrie, G. Gallinaro, N. Gatti, N. Jeannin, M. Luccini, L. Luini, R. Nebuloni, A. Paraboni, L. Resteghini, C. Riva

引用次数: 0

Integration of Fade Mitigation within centrally managed MF-TDMA/DVB-RCS networks 在集中管理的MF-TDMA/DVB-RCS网络中集成衰减缓解

Space Communications Pub Date : 2009-01-01 DOI: 10.3233/SC-2009-0330

Eleni Noussi, B. Grémont, M. Filip

引用次数: 3

New variant of the deployable ring-shaped space antenna reflector 可展开环形空间天线反射器的新改型

Space Communications Pub Date : 2009-01-01 DOI: 10.3233/SC-2009-0351

E. Medzmariashvili, S. Tserodze, V. Gogilashvili, A. Sarchimelia, K. Chkhikvadze, N. Siradze, N. Tsignadze, M. Sanikidze, M. Nikoladze, G. Datunashvili

{"title":"New variant of the deployable ring-shaped space antenna reflector","authors":"E. Medzmariashvili, S. Tserodze, V. Gogilashvili, A. Sarchimelia, K. Chkhikvadze, N. Siradze, N. Tsignadze, M. Sanikidze, M. Nikoladze, G. Datunashvili","doi":"10.3233/SC-2009-0351","DOIUrl":"https://doi.org/10.3233/SC-2009-0351","url":null,"abstract":"Despite that theoretical, design and experimental studies connected with the creation of large deployable antenna reflectors have already been carried out for quite a long time, this area still remains of lively interest and has good application prospects. An example is the program of the European Space Agency ESA on the creation of a qualified variant of a 15 m deployable space offset reflector. It should be said that by the time the ESA adopted a decision on the implementation of this program, a deployable space reflector 7 m in diameter had already been created in Georgia and, in 1999, this space reflector was successfully tested aboard the orbital station “Mir” according to the joint Georgian--Russian program.Georgian Institute for Space Constructions, continues developing new design principles for large space deployable systems Transformable Space and Ground Structures in Russian, A Monograph, Georgia--Germany--Liechtenstein, 1995.In the paper we describe the invention of an absolutely new design of a space antenna for symmetric and nonsymmetric radio telescopes, which has been developed by the team of Georgian designers headed by Professor E. Medzmariashvili.The novelty consists in that new engineering and technological effects we obtained by synthesis of ring-shaped and rib-umbrella type systems.In particular, the central hinge that connects the main levers of the pantograph is arranged asymmetrically. As a result of this asymmetrical arrangement, during deployment the consoles folded along the package longitudinal axis and connecting the adjacent sections move in radial directions from the center to the periphery and, simultaneously, deploy in an umbrella-like manner.","PeriodicalId":51158,"journal":{"name":"Space Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78581630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

A study on SNR estimation algorithms for channel state estimation in Communication Satellite Systems employing Fade Mitigation Techniques 基于衰落抑制技术的通信卫星信道状态估计信噪比估计算法研究

Space Communications Pub Date : 2009-01-01 DOI: 10.3233/SC-2009-0352

A. Aroumont, L. Castanet, M. Bousquet

引用次数: 7

Performance assessment of Fade Mitigation Techniques for the GEOCAST IST project with transparent and OBP architectures 具有透明和OBP架构的GEOCAST IST项目衰减缓解技术的性能评估

Space Communications Pub Date : 2009-01-01 DOI: 10.3233/SC-2009-0326

L. Castanet, A. Alamañac, M. Bousquet, Laurent Claverotte, R. Gutierrez-Galvan

引用次数: 4

The ANASTASIA project: A contribution to the definition of a future aeronautical communication system ANASTASIA项目:对未来航空通信系统定义的贡献

Space Communications Pub Date : 2008-08-01 DOI: 10.3233/SC-2008-0348

J. Catros, Aleister Smith, P. King

{"title":"The ANASTASIA project: A contribution to the definition of a future aeronautical communication system","authors":"J. Catros, Aleister Smith, P. King","doi":"10.3233/SC-2008-0348","DOIUrl":"https://doi.org/10.3233/SC-2008-0348","url":null,"abstract":"Project objectives: The core of ANASTASIA (Airborne New Advanced Satellite Techniques & Technologies in a System Integrated Approach) research is to provide on-board Communication, Navigation and Surveillance (CNS) solutions to cope with the foreseen doubling of air traffic by 2020. \u0000 \u0000ANASTASIA will carry out research of future technology and system architectures for navigation, resulting in the development of a new generation of airborne Global Navigation Satellite System (GNSS) receivers for all phases of flight. Such systems will offer accurate and safe global navigation while reducing avionics cost through the optimisation of the number and complexity of on board equipment. \u0000 \u0000On the communication side, work will concentrate on the design and implementation of a prototype Satcom system that will meet the evolving European Air Traffic Management (ATM) requirements. Research will also be made into higher bandwidth services, systems and airborne equipment to efficiently meet long term future aircraft communication requirements, including both ATM and passenger needs. \u0000 \u0000The future needs of Surveillance will be consolidated with the requirements and key technology tests from Communications and Navigation. \u0000 \u0000Expected results: The main goal of ANASTASIA is to pave the way for the introduction of new satellite-based technologies into aircraft operations in both Navigation and Communications. \u0000 \u0000The main outcome of ANASTASIA will be recommendations for future civil aircraft operation and a set of evaluated technologies and avionics architectures achievable from 2010 that will enable more autonomous, satellite-based aircraft operation. \u0000 \u0000Paper focus: After a general description of the rationale of the project and of its global CNS objectives, the focus is made in this paper on the communication side where more detailed objectives and initial results are presented.","PeriodicalId":51158,"journal":{"name":"Space Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81714082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0