发布求助
文献互助 智能选刊 最新文献

2006 International Workshop on Satellite and Space Communications最新文献

筛选
英文 中文
Turbo Decoder Development in Regenerative Communications Satellites 再生式通信卫星涡轮解码器的发展
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.255979
B. Lestriez, E. R. Perez
{"title":"Turbo Decoder Development in Regenerative Communications Satellites","authors":"B. Lestriez, E. R. Perez","doi":"10.1109/IWSSC.2006.255979","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.255979","url":null,"abstract":"For regenerative telecom satellite systems, the turbo decoder has become a basic component of the on-board processing (OBP). This paper presents the algorithm selection choices and the test bench policy during the design process of a communication system critical block such as a turbo decoder compliant with the DVB-RCS standard (digital video broadcast-return channel satellite). The architecture, based on the max-log-map algorithm, is described emphasising results and advantages of the storage requirement reduction policy applied. Secondly, the chosen test policy is presented, it has considered the specific Space environment requirements and difficulties to fulfil performance evaluations of some complex algorithms in a short period of time. This method has allowed a fast debugging and fine-tuning of the design in order to get the best area, frequency, and performance trade-off, together with having sped-up bit error rate (BER) measurements to just days when normally it would have required weeks of operation","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134314668","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: 3
Evaluation of diversity gain and system capacity increase in a multiple HAP system 多HAP系统中分集增益和系统容量增加的评估
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.256004
T. Celcer, G. Kandus, T. Javornik, M. Mohorčič, S. Plevel
{"title":"Evaluation of diversity gain and system capacity increase in a multiple HAP system","authors":"T. Celcer, G. Kandus, T. Javornik, M. Mohorčič, S. Plevel","doi":"10.1109/IWSSC.2006.256004","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256004","url":null,"abstract":"High altitude platform (HAP) system offers establishment of communication links with predominantly line-of-sight (LOS) conditions due to high elevation angles. However, in mobile scenario, the transmitted signal is still subject to blocking due to obstacles between HAP and the user, which increases the probability of link outage. In the light of this, multiple HAP constellations with overlapped coverage areas can be exploited for platform diversity to improve the system reliability and availability or for the increase of the system capacity through the use of highly directional user antennas. In this paper we evaluate a potential diversity gain and capacity increase for a mobile scenario based on a simulation taking into account a digital relief model (DRM) of Slovenia and two main railway tracks, providing results in terms of the timeshare of different visibility events and the CINR values","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134342793","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: 8
Optimal key scheduling for secure satellite broadcasting to mobile users 面向移动用户的安全卫星广播的最优密钥调度
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.255985
R. Di Pietro, S. Iannitti
{"title":"Optimal key scheduling for secure satellite broadcasting to mobile users","authors":"R. Di Pietro, S. Iannitti","doi":"10.1109/IWSSC.2006.255985","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.255985","url":null,"abstract":"Cryptography will be the most suitable technique to protect the access to subscribed added-value services for mobile applications provided through satellite broadcasting (e.g., localization and mobile TV). Although satellite broadcasting allows provision of the service even in remote locations, it may also prevent small mobile devices from sending feedback to the satellite when no special return link is provided. In specific locations, where the satellite signals cannot be received due to shadowing or interference, mobile users may also lose the key management data transmitted by the satellite, thus being impossible for them to decrypt the broadcasted data related to the service. A way to overcome these issues is the re-transmission of keys in order to guarantee that the largest set of legitimate receivers has the updated (set of) keys. In this paper we analyze the problem of key update in a mobile user context and propose a scheduling algorithm for key broadcasting that minimizes the number of mobile users that are prevented from updating their crypto keys. Our results are supported by simulations","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132120862","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: 3
DVB-S2 in Railway Environments: An Exploratory Study for Tunnel Coverage 铁路环境下DVB-S2隧道覆盖的探索性研究
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.255994
M. Iubatti, G. Corazza, A. Vanelli-Coralli, M. Villanti
{"title":"DVB-S2 in Railway Environments: An Exploratory Study for Tunnel Coverage","authors":"M. Iubatti, G. Corazza, A. Vanelli-Coralli, M. Villanti","doi":"10.1109/IWSSC.2006.255994","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.255994","url":null,"abstract":"In this paper we address the problem of DVB-S2 signal reliability in railway tunnel environments. We have focused our attention on the selection of the most suitable frequency band to be used in the tunnel coverage by gap fillers and on its impact on in-tunnel propagation and handover between satellite and gap fillers. The propagation characteristics, i.e. attenuation, of several bands in and out of the tunnel are provided adopting an EM (waveguide) approach. A handover procedure between satellite Ka/Ku band and selected ISM band for gap fillers is also proposed","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124012000","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: 4
Short- And Mid-Term Prediction Techniques Of Propagation Conditions From Weather Radar Observations. Application to resource management in SATCOM systems 气象雷达观测传播条件的中短期预报技术。卫星通信系统资源管理中的应用
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.256033
L. Emiliani, A. Paraboni, J. Lemorton, L. Castanet, L. Feral, M. Bousquet
{"title":"Short- And Mid-Term Prediction Techniques Of Propagation Conditions From Weather Radar Observations. Application to resource management in SATCOM systems","authors":"L. Emiliani, A. Paraboni, J. Lemorton, L. Castanet, L. Feral, M. Bousquet","doi":"10.1109/IWSSC.2006.256033","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256033","url":null,"abstract":"This paper discusses possible scenarios for inclusion of forecasting of rain fields in satellite communication system for the purposes of optimizing the use of layer 1 resources (EIRP, frequencies)","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124168672","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: 4
Characterization of the Attenuation due to Rain Cell Fields applying Cellular Automata to Weather Radar Images 应用元胞自动机分析天气雷达图像的雨细胞场衰减特性
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.255978
A. Nuñez, V. Pastoriza, P. Mariño, F. Fontán, U. Fiebig
{"title":"Characterization of the Attenuation due to Rain Cell Fields applying Cellular Automata to Weather Radar Images","authors":"A. Nuñez, V. Pastoriza, P. Mariño, F. Fontán, U. Fiebig","doi":"10.1109/IWSSC.2006.255978","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.255978","url":null,"abstract":"A straightforward linkage between rain cell dynamics in terms of reflectivity Z (dBz) or its equivalent rain rate R (mm/h) and satellite or terrestrial radiolink attenuation can be performed. This work focuses on the presentation of an approach for assessing and characterizing rain cell dynamics based exclusively on the analysis of the radar reflectivity scans recorded in weather radar image, and without an a priori assumption on the structure of rain cells. This research has been addressed by using cellular automata. Rain cell dynamics are simulated by using probabilistic cellular automata rules and tracking vectors which indicate a global advection direction and velocity","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128548193","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
RELAX: REaL time transmission of flight information and blAck boXes data 放松:实时传输航班信息和黑匣子数据
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.256028
F. Lo Piccolo, N. B. Melazzi, G. Bianchi
{"title":"RELAX: REaL time transmission of flight information and blAck boXes data","authors":"F. Lo Piccolo, N. B. Melazzi, G. Bianchi","doi":"10.1109/IWSSC.2006.256028","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256028","url":null,"abstract":"This position paper aims at proposing the use of satellite-based communication systems, which will play an ever increasing role in the future aeronautical communication services, to enable the real time transmission of flight information and black boxes data. Besides the immediate availability of the black boxes data after an air crash, the amount and the kind of the recorded data may be augmented, by including for example cockpit images. The RELAX system will also increase the aircraft safety level, reduce the accident rates and improve the monitoring process overall performance. In this paper, we briefly review existing proposals on this topic, list possible advantages and drawbacks and sketch a draft system architecture","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117206551","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
Modeling of rain fields at large scale 大尺度雨场模拟
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.256032
N. Jeannin, L. Feral, H. Sauvageot, L. Castanet, J. Lemorton
{"title":"Modeling of rain fields at large scale","authors":"N. Jeannin, L. Feral, H. Sauvageot, L. Castanet, J. Lemorton","doi":"10.1109/IWSSC.2006.256032","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256032","url":null,"abstract":"This paper describes the modeling of rain fields at small (size of a rain cell) mid (100times100 km2) and very large scale (4000times4000 km2). The methodology lies on a cellular description of rain fields by HYCELL Mid-scale fields are generated so that they account for local climatology and for spatial repartition of rain cells deduced from radar data. Very large scale fields are generated in two steps. First rainy areas are determined by thresholding a stationary Gaussian random field. In each point of the field, the probability of rain apparition is the one recommended by ITU and the covariance function is determined in order to reproduce the one observed by meteorological radar. Then rain intensity for rainy area is determined by applying mid-scale model to each mid-scale rainy area. Rain fields simulated are turned into attenuation fields and compared with ITU-R recommendations and radar observations","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"521 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116199363","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: 3
Practical Development of an Embedded Hybrid Wireless DTN Node 嵌入式混合无线DTN节点的实际开发
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.256030
F. Gil-Castiñeira, F. González-Castaño, R. Asorey-Cacheda, L. Franck, S. Paillard
{"title":"Practical Development of an Embedded Hybrid Wireless DTN Node","authors":"F. Gil-Castiñeira, F. González-Castaño, R. Asorey-Cacheda, L. Franck, S. Paillard","doi":"10.1109/IWSSC.2006.256030","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256030","url":null,"abstract":"In this paper, we describe our experience in the development of a low-cost delay-tolerant network (DTN) node, based on a commercial wireless access point (AP). As far as we know, there are no previous related experiences. To achieve our goal, it was necessary to perform some changes in the original DTN stack implementation to support the AP hardware, and compile it with a Linux-based AP firmware. We explain all the steps we followed to install and test our modified firmware, and we comment our experience","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"520 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127626096","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: 3
DVB-S2/RCS Suitability for the Provision of Air Traffic Management Services DVB-S2/RCS是否适合提供空中交通管理服务
2006 International Workshop on Satellite and Space Communications Pub Date : 2006-12-11 DOI: 10.1109/IWSSC.2006.255998
C. Kissling, C. P. Niebla, N. R. Diaz, S. Scalise
{"title":"DVB-S2/RCS Suitability for the Provision of Air Traffic Management Services","authors":"C. Kissling, C. P. Niebla, N. R. Diaz, S. Scalise","doi":"10.1109/IWSSC.2006.255998","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.255998","url":null,"abstract":"Safe flying in a future (busy) airspace will require significantly increased volumes of information exchanges, as well as reliable and adequate transfer mechanisms for both the air/ground and the air/air segments. However, current communications systems will not be able to support the estimated traffic growth using today's operating concept or the upcoming operating concepts already under development. A new air traffic management communications infrastructure is required for the future. A very likely scenario for forthcoming aircraft communications architecture includes satellite links as an essential component in order to meet the required QoS such as coverage, availability, priority and integrity","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121555898","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: 4
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信