Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333085
Andis Dembovskis
The SAT-AIS technology, which offers global ship traffic monitoring from low earth orbit, is steadily gaining more attention within groups of communication hardware designers, as well as among safety policy chairman. Numerous research and business groups are elaborating hardware solutions. Motivated by testing needs as a result of the upcoming DLR AIS satellite-mission AISat, a dedicated AIS Testbed for Satellite Systems was developed. This paper describes the approaches and procedures, which were identified as the most significant for testing SAT-AIS hardware.
{"title":"Testbed for performance evaluation of SAT-AIS receivers","authors":"Andis Dembovskis","doi":"10.1109/ASMS-SPSC.2012.6333085","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333085","url":null,"abstract":"The SAT-AIS technology, which offers global ship traffic monitoring from low earth orbit, is steadily gaining more attention within groups of communication hardware designers, as well as among safety policy chairman. Numerous research and business groups are elaborating hardware solutions. Motivated by testing needs as a result of the upcoming DLR AIS satellite-mission AISat, a dedicated AIS Testbed for Satellite Systems was developed. This paper describes the approaches and procedures, which were identified as the most significant for testing SAT-AIS hardware.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"10 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":"125533775","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.2012.6333111
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.2012.6333109
M. Pannozzo, L. S. Drioli, D. Zamberlan
The present paper describes the design, manufacturing and testing of a switchable dual polarised Tx/Rx antenna for S-band vehicular applications. The paper also addresses antenna production and the related validation tests. The main contributions and novelty of the antennas designed in the framework of the project are the full integration with ESA requirements and needs, requirements and constraints of automotive market (thanks also to the multi-decennial experience of Calearo Group) for satellite mobile services. Moreover the products are ready for the market and the solutions are highly integrated (including low noise block and filtering section) in a low-cost and shark-fin-like aesthetical concept where the industrialization process has been actively considered and developed.
{"title":"Costars: Low cost S-band receive transmit antenna for vehicular applications","authors":"M. Pannozzo, L. S. Drioli, D. Zamberlan","doi":"10.1109/ASMS-SPSC.2012.6333109","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333109","url":null,"abstract":"The present paper describes the design, manufacturing and testing of a switchable dual polarised Tx/Rx antenna for S-band vehicular applications. The paper also addresses antenna production and the related validation tests. The main contributions and novelty of the antennas designed in the framework of the project are the full integration with ESA requirements and needs, requirements and constraints of automotive market (thanks also to the multi-decennial experience of Calearo Group) for satellite mobile services. Moreover the products are ready for the market and the solutions are highly integrated (including low noise block and filtering section) in a low-cost and shark-fin-like aesthetical concept where the industrialization process has been actively considered and developed.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"18 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":"130076950","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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