Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333111
Z. Katona
This paper focuses on a novel, conceptual data relay system for relaying data transfer between low earth orbit (LEO) satellites and a gateway through a geostationary earth orbit (GEO) satellite, developed in the framework of the GeReLEO project. Novel channel adaptive transmission schemes are introduced in addition to the access scheme supporting several LEO satellites in parallel. On top of this, a novel multibeam receiving antenna with several electronically controlled beams is developed for high-rate unidirectional links. The multiple access and transmission schemes, moreover the concept of the multibeam antenna shall be verified with lab demonstrations during the course of the project.
{"title":"GEO data relay for low earth orbit satellites","authors":"Z. Katona","doi":"10.1109/ASMS-SPSC.2012.6333111","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333111","url":null,"abstract":"This paper focuses on a novel, conceptual data relay system for relaying data transfer between low earth orbit (LEO) satellites and a gateway through a geostationary earth orbit (GEO) satellite, developed in the framework of the GeReLEO project. Novel channel adaptive transmission schemes are introduced in addition to the access scheme supporting several LEO satellites in parallel. On top of this, a novel multibeam receiving antenna with several electronically controlled beams is developed for high-rate unidirectional links. The multiple access and transmission schemes, moreover the concept of the multibeam antenna shall be verified with lab demonstrations during the course of the project.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121948556","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333102
D. Tarchi, G. Corazza, A. Vanelli-Coralli
In the last years we are witnessing the increasing presence of multimedia application, in a wide variety of terminals, from the PC to the notebook, from the smartphone to the tablet. In order to exploit such advanced services the requirement is to have an ubiquitous and broadband connection. While urban or suburban areas can be covered by using terrestrial wireless broadband networks, there are several rural or low populated areas with narrowband access. To this aim, satellite technologies allow to cover very large areas. However, they still have some issues in covering mobile users with broadband connections. One of the most important approaches is to develop adaptive waveforms techniques able to exploit the variable channel behavior. Adaptive coding and modulation (ACM) belongs to this family of algorithms, by adapting the modulation and coding scheme based on the channel behavior. In this paper a comparison among three different techniques is proposed by focusing on a state approach for increasing the user throughput, and considering different mobile speeds.
{"title":"Adaptive coding and modulation techniques for mobile satellite communications: A state estimation approach","authors":"D. Tarchi, G. Corazza, A. Vanelli-Coralli","doi":"10.1109/ASMS-SPSC.2012.6333102","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333102","url":null,"abstract":"In the last years we are witnessing the increasing presence of multimedia application, in a wide variety of terminals, from the PC to the notebook, from the smartphone to the tablet. In order to exploit such advanced services the requirement is to have an ubiquitous and broadband connection. While urban or suburban areas can be covered by using terrestrial wireless broadband networks, there are several rural or low populated areas with narrowband access. To this aim, satellite technologies allow to cover very large areas. However, they still have some issues in covering mobile users with broadband connections. One of the most important approaches is to develop adaptive waveforms techniques able to exploit the variable channel behavior. Adaptive coding and modulation (ACM) belongs to this family of algorithms, by adapting the modulation and coding scheme based on the channel behavior. In this paper a comparison among three different techniques is proposed by focusing on a state approach for increasing the user throughput, and considering different mobile speeds.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133585464","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333070
R. Briskman, R. Akturan
S-band is used in North America for a successful and growing satellite radio one-way broadcast system. It is currently being expanded and improved to provide localization, personalized and on-demand services. Two way capability to accomplish this will initially be through the internet accessed by cellular telephones, iphones and smartphones. Future improvement for high volume requested returns to the mobile subscriber may use Wi-Fi access to the internet.
{"title":"S-band commercial satellite usage in North America","authors":"R. Briskman, R. Akturan","doi":"10.1109/ASMS-SPSC.2012.6333070","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333070","url":null,"abstract":"S-band is used in North America for a successful and growing satellite radio one-way broadcast system. It is currently being expanded and improved to provide localization, personalized and on-demand services. Two way capability to accomplish this will initially be through the internet accessed by cellular telephones, iphones and smartphones. Future improvement for high volume requested returns to the mobile subscriber may use Wi-Fi access to the internet.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131229011","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333086
Nicolas Bouny, J. LeMaitre, J. Millerioux
The Automatic Identification System (AIS) is a maritime surveillance system using the VHF band to exchange information between ships and shore stations, including positions, identification, course and speed. It mainly aims at avoiding collisions between ships. The link budgets allow receiving transmitted AIS signals from space, and consequently a global maritime surveillance from space can be considered. However, some challenges arise, especially message collisions due to the use of a SO-TDMA protocol (not designed for satellite detection). Advanced signal processing for separation of received signals is needed. In this paper, we describe a measurement campaign of AIS signals (from many different transmitters) in the Ouessant rail realised to understand the needs of space-based AIS system. Detailed results at different layers are given.
{"title":"Results of measurement campaign for characterisation of AIS transmitters","authors":"Nicolas Bouny, J. LeMaitre, J. Millerioux","doi":"10.1109/ASMS-SPSC.2012.6333086","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333086","url":null,"abstract":"The Automatic Identification System (AIS) is a maritime surveillance system using the VHF band to exchange information between ships and shore stations, including positions, identification, course and speed. It mainly aims at avoiding collisions between ships. The link budgets allow receiving transmitted AIS signals from space, and consequently a global maritime surveillance from space can be considered. However, some challenges arise, especially message collisions due to the use of a SO-TDMA protocol (not designed for satellite detection). Advanced signal processing for separation of received signals is needed. In this paper, we describe a measurement campaign of AIS signals (from many different transmitters) in the Ouessant rail realised to understand the needs of space-based AIS system. Detailed results at different layers are given.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123485202","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333095
G. Colavolpe
In this tutorial paper, we first review the main information-theoretic results on channels affected by a time-varying phase noise. The main MAP symbol detection algorithms to be employed in such a challenging scenario are then described considering linear modulations and advanced coding schemes based on iterative detection and decoding. The role of pilot symbols will be also discussed.
{"title":"Communications over phase-noise channels: A tutorial review","authors":"G. Colavolpe","doi":"10.1109/ASMS-SPSC.2012.6333095","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333095","url":null,"abstract":"In this tutorial paper, we first review the main information-theoretic results on channels affected by a time-varying phase noise. The main MAP symbol detection algorithms to be employed in such a challenging scenario are then described considering linear modulations and advanced coding schemes based on iterative detection and decoding. The role of pilot symbols will be also discussed.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122520471","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333066
R. Duke-Woolley
Summary of the main points arising in a study conducted by Beecham Research for the European Space Agency - SAMOS (SAtellite M2m Observatory Study). This provides the basis for conference presentation slides.
{"title":"Findings from ESA SAMOS project - SAtellite M2m Observatory Study","authors":"R. Duke-Woolley","doi":"10.1109/ASMS-SPSC.2012.6333066","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333066","url":null,"abstract":"Summary of the main points arising in a study conducted by Beecham Research for the European Space Agency - SAMOS (SAtellite M2m Observatory Study). This provides the basis for conference presentation slides.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131469432","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333105
Meixiang Zhang, Sooyoung Kim, Won-Yong Kim, Yong-Hoon Cho
This paper presents a new bit-interleaved higher-order APSK scheme for LDPC codes. Although the maximum decoding performance can be achieved using the maximum likelihood (ML) soft detection scheme, the complexity increases exponentially with the modulation orders. We approximate the ML soft detection scheme by applying the hard decision threshold (HDT) based method for a modified constellation of 32-APSK. In order to further improve the BER performance, we combined an efficient bit interleaving scheme, by considering that BER performance of each bit contained in a symbol is not uniform. Simulation results demonstrate that the proposed bit-interleaved scheme with very simple HDT based soft detection can achieve better performance compared to the ML detection of conventional scheme.
{"title":"Efficient bit-interleaved APSK scheme for LDPC codes","authors":"Meixiang Zhang, Sooyoung Kim, Won-Yong Kim, Yong-Hoon Cho","doi":"10.1109/ASMS-SPSC.2012.6333105","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333105","url":null,"abstract":"This paper presents a new bit-interleaved higher-order APSK scheme for LDPC codes. Although the maximum decoding performance can be achieved using the maximum likelihood (ML) soft detection scheme, the complexity increases exponentially with the modulation orders. We approximate the ML soft detection scheme by applying the hard decision threshold (HDT) based method for a modified constellation of 32-APSK. In order to further improve the BER performance, we combined an efficient bit interleaving scheme, by considering that BER performance of each bit contained in a symbol is not uniform. Simulation results demonstrate that the proposed bit-interleaved scheme with very simple HDT based soft detection can achieve better performance compared to the ML detection of conventional scheme.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"146 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120897064","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333100
C. Riva, C. Capsoni, L. Luini, M. Luccini, R. Nebuloni, A. Martellucci
This contribution is aimed at presenting the scenario of the expected atmospheric impairments suffered by a radio link operating in the W band, as derived by the present theoretical and experimental knowledge. The contributions to signal fade due to gases, clouds, scintillation and rain (with emphasis also on the impact of the hydrometeor size distribution), as well as the melting layer characteristics and the depolarization of the electromagnetic waves are discussed. The main objective is to assess the constraints to face in the design of a satellite TLC system operating in the W band.
{"title":"W-band atmospheric radiowave propagation A challenge for satellite TLC systems","authors":"C. Riva, C. Capsoni, L. Luini, M. Luccini, R. Nebuloni, A. Martellucci","doi":"10.1109/ASMS-SPSC.2012.6333100","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333100","url":null,"abstract":"This contribution is aimed at presenting the scenario of the expected atmospheric impairments suffered by a radio link operating in the W band, as derived by the present theoretical and experimental knowledge. The contributions to signal fade due to gases, clouds, scintillation and rain (with emphasis also on the impact of the hydrometeor size distribution), as well as the melting layer characteristics and the depolarization of the electromagnetic waves are discussed. The main objective is to assess the constraints to face in the design of a satellite TLC system operating in the W band.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132359678","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333106
G. Gallinaro, E. Tirrò, Filippo Di Cecca, M. Migliorelli, N. Gatti, S. Cioni
This paper summarizes some of the outcomes of an investigation activity aimed at analysing the benefits of different system architectures and technologies for next generation S-band mobile satellite interactive / broadcasting networks. Along with advanced antenna and payload architectures, a promising way forward in this context is the migration from the conventional single polarization per beam to an advanced dual polarization per beam architecture for effective spectrum exploitation. In this framework, system capacity results are presented and they highlight potential improvements in a 60% to 90% range in terms of system throughput.
{"title":"Next generation interactive s-band mobile systems Challenges and solutions","authors":"G. Gallinaro, E. Tirrò, Filippo Di Cecca, M. Migliorelli, N. Gatti, S. Cioni","doi":"10.1109/ASMS-SPSC.2012.6333106","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333106","url":null,"abstract":"This paper summarizes some of the outcomes of an investigation activity aimed at analysing the benefits of different system architectures and technologies for next generation S-band mobile satellite interactive / broadcasting networks. Along with advanced antenna and payload architectures, a promising way forward in this context is the migration from the conventional single polarization per beam to an advanced dual polarization per beam architecture for effective spectrum exploitation. In this framework, system capacity results are presented and they highlight potential improvements in a 60% to 90% range in terms of system throughput.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115129430","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}
Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333091
D. G. Depoorter, E. Fazli
The presence of a virtual private network over a broadband satellite link creates some issues that must be addressed to avoid degradation on the overall performance. This paper presents these issues and proposes solutions to them from the point of view of the satellite operator. Then, these solutions are evaluated through a set of measurements on a testbed that simulates satellite links connecting an airplane with the ground.
{"title":"Solutions evaluation for issues when deploying VPNs over satellite links","authors":"D. G. Depoorter, E. Fazli","doi":"10.1109/ASMS-SPSC.2012.6333091","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333091","url":null,"abstract":"The presence of a virtual private network over a broadband satellite link creates some issues that must be addressed to avoid degradation on the overall performance. This paper presents these issues and proposes solutions to them from the point of view of the satellite operator. Then, these solutions are evaluated through a set of measurements on a testbed that simulates satellite links connecting an airplane with the ground.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123211869","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}
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