Pub Date : 2012-10-18DOI: 10.1109/ASMS-SPSC.2012.6333064
M. Vázquez-Castro, N. Alagha
In this paper a novel approach is presented for the design of a multibeam satellite system. It is based on the assumption that terminals have the capability to decode the links from the orthogonal transmissions that are present at any location of a conventional coloured multi-beam satellite system. Terminals would not only decode the transmission intended to the beam where it is located but also the transmissions intended to its adjacent beams. The key observation is that orthogonal frequencies and/or polarizations used for such transmissions can actually be considered as available offered throughput instead of being just wasted. This is of particular interest for multicast scenarios. This paper investigates this approach and an analytical model of a multilink reception is derived. Specifically, we obtain analytical expressions for the per user terminal (UT), per beam and system aggregated throughput. We apply the analysis assuming the adaptive physical layer reception of the Digital Video Broadcasting over Satellite 2nd generation (DVB-S2). We show that for a realistic antenna and a four colour system, transmissions intended to the adjacent orthogonal beams can be decoded as spectral efficiencies spread over a wide range up to 16APSK. In particular, we show that assuming reception of both the intended and the strongest orthogonal signal and a uniform distribution of users a spectral efficiency reduction in 25% for the intended beam results in a spectral efficiency increase of 150% due to multi-link reception and so a net gain of 125% can be achieved. Furthermore, the service would target a larger number of users that a state-of-the-art design would do with the consequent revenue benefit.
{"title":"Multi-link reception multibeam satellite system model","authors":"M. Vázquez-Castro, N. Alagha","doi":"10.1109/ASMS-SPSC.2012.6333064","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333064","url":null,"abstract":"In this paper a novel approach is presented for the design of a multibeam satellite system. It is based on the assumption that terminals have the capability to decode the links from the orthogonal transmissions that are present at any location of a conventional coloured multi-beam satellite system. Terminals would not only decode the transmission intended to the beam where it is located but also the transmissions intended to its adjacent beams. The key observation is that orthogonal frequencies and/or polarizations used for such transmissions can actually be considered as available offered throughput instead of being just wasted. This is of particular interest for multicast scenarios. This paper investigates this approach and an analytical model of a multilink reception is derived. Specifically, we obtain analytical expressions for the per user terminal (UT), per beam and system aggregated throughput. We apply the analysis assuming the adaptive physical layer reception of the Digital Video Broadcasting over Satellite 2nd generation (DVB-S2). We show that for a realistic antenna and a four colour system, transmissions intended to the adjacent orthogonal beams can be decoded as spectral efficiencies spread over a wide range up to 16APSK. In particular, we show that assuming reception of both the intended and the strongest orthogonal signal and a uniform distribution of users a spectral efficiency reduction in 25% for the intended beam results in a spectral efficiency increase of 150% due to multi-link reception and so a net gain of 125% can be achieved. Furthermore, the service would target a larger number of users that a state-of-the-art design would do with the consequent revenue benefit.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"131 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":"126945724","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.2012.6333076
T. Heyn, Peter Nagel, B. Niemann, A. Recchia, F. Collard, R. Hermenier, M. Marchitti, M. Andrenacci, Gaetano Mendola
An open ITS platform combining interactive satellite services with other communication channels is being developed and evaluated in field trials within the SafeTRIP project. Prototyping and in-field validation of a novel waveform for messaging return channel over satellite for land mobile is an important objective of the project. The overall system architecture has recently been standardized by ETSI under the name of S-MIM (S-band Mobile Interactive Multimedia). The messaging protocol, described in the Part 3 of the standard, is based on the Enhanced Spread Spectrum Aloha (E-SSA). Its main asset resides in the low power required at the transmitter, which will allow the reuse of off-the-shelf power amplifiers and low-cost omnidirectional antennas. This paper will present a comprehensive summary of previous E-SSA performance analysis from simulations and the first field trials results using the E-SSA waveform. The presented results have been derived from static and mobile field trials carried out in Germany with fully functional E-SSA modulator and demodulator prototypes and the EUTELSAT10A satellite. Results for the static and mobile performance of the E-SSA demonstrator with an omni-directional antenna under Line-ofsight (LOS) conditions are presented. The measured Packet Error Rates of transmissions via satellite at different terminal power levels confirm the theoretical link budget calculations for single and multiple simultaneously transmitting terminals. The degradation due to fading effects of the transmission channel under mobile conditions has been measured during the trials to approx. 3 dB. The resulting overall required transmitter power in the multi-user scenario of the trials setup has been only -3 dBW to reach a high QoS under mobile conditions. This value confirms the suitability of the E-SSA waveform for interactive mobile services for the mass market.
{"title":"E-SSA satellite messaging return channel: Performance analysis and field trials results","authors":"T. Heyn, Peter Nagel, B. Niemann, A. Recchia, F. Collard, R. Hermenier, M. Marchitti, M. Andrenacci, Gaetano Mendola","doi":"10.1109/ASMS-SPSC.2012.6333076","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333076","url":null,"abstract":"An open ITS platform combining interactive satellite services with other communication channels is being developed and evaluated in field trials within the SafeTRIP project. Prototyping and in-field validation of a novel waveform for messaging return channel over satellite for land mobile is an important objective of the project. The overall system architecture has recently been standardized by ETSI under the name of S-MIM (S-band Mobile Interactive Multimedia). The messaging protocol, described in the Part 3 of the standard, is based on the Enhanced Spread Spectrum Aloha (E-SSA). Its main asset resides in the low power required at the transmitter, which will allow the reuse of off-the-shelf power amplifiers and low-cost omnidirectional antennas. This paper will present a comprehensive summary of previous E-SSA performance analysis from simulations and the first field trials results using the E-SSA waveform. The presented results have been derived from static and mobile field trials carried out in Germany with fully functional E-SSA modulator and demodulator prototypes and the EUTELSAT10A satellite. Results for the static and mobile performance of the E-SSA demonstrator with an omni-directional antenna under Line-ofsight (LOS) conditions are presented. The measured Packet Error Rates of transmissions via satellite at different terminal power levels confirm the theoretical link budget calculations for single and multiple simultaneously transmitting terminals. The degradation due to fading effects of the transmission channel under mobile conditions has been measured during the trials to approx. 3 dB. The resulting overall required transmitter power in the multi-user scenario of the trials setup has been only -3 dBW to reach a high QoS under mobile conditions. This value confirms the suitability of the E-SSA waveform for interactive mobile services for the mass market.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"1 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":"130855716","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.2012.6333092
G. Garrammone, Tomaso de Cola, B. Matuz, G. Liva
The use of erasure codes in space communications has proved to be promising in order to make communication more robust against both independent and correlated data losses. In particular, erasure codes are an appealing solution to provide space communications with increased reliability, especially in scenarios where large latencies make the use of automatic repeat request (ARQ) strategies problematic. In this regard, preliminary studies on the use of binary low-density parity-check (LDPC) codes under maximum likelihood (ML)/iterative (IT) decoding have been carried out showing the performance benefit they can bring over traditional schemes based on retransmissions. This paper extends the analysis conducted in previous studies towards non-binary LDPC codes. Performance assessment is carried out with respect to reliability metrics (codeword error rate) and encoding/decoding complexity, taking into consideration the limitations of space communications in terms of storage and processing capabilities. Finally, the paper sketches some design guidelines on the integration of the proposed codes into the Consultative Committee for Space Data Systems (CCSDS) protocol stack, implemented as extension of the Licklider Transmission Protocol (LTP).
{"title":"Erasure codes for space communications: Recent findings and new challenges","authors":"G. Garrammone, Tomaso de Cola, B. Matuz, G. Liva","doi":"10.1109/ASMS-SPSC.2012.6333092","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333092","url":null,"abstract":"The use of erasure codes in space communications has proved to be promising in order to make communication more robust against both independent and correlated data losses. In particular, erasure codes are an appealing solution to provide space communications with increased reliability, especially in scenarios where large latencies make the use of automatic repeat request (ARQ) strategies problematic. In this regard, preliminary studies on the use of binary low-density parity-check (LDPC) codes under maximum likelihood (ML)/iterative (IT) decoding have been carried out showing the performance benefit they can bring over traditional schemes based on retransmissions. This paper extends the analysis conducted in previous studies towards non-binary LDPC codes. Performance assessment is carried out with respect to reliability metrics (codeword error rate) and encoding/decoding complexity, taking into consideration the limitations of space communications in terms of storage and processing capabilities. Finally, the paper sketches some design guidelines on the integration of the proposed codes into the Consultative Committee for Space Data Systems (CCSDS) protocol stack, implemented as extension of the Licklider Transmission Protocol (LTP).","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"6 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":"128823911","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.2012.6333082
F. Rossetto, M. Berioli
Single Carrier FDMA may offer important advantages for satellite networks, for instance in terms of increased spectral efficiency, compared to classic MF-TDMA multiple access schemes. This work studies the performance of synchronization procedures and provides indications on the system sizing when SC FDMA is employed over the return link of a GEO satellite system. It is shown how a DVB-RCS like closed loop synchronization can yield satisfactory results for stationary users, while it is still challenging to achieve the same results for mobile terminals.
{"title":"On synchronisation for SC-FDMA waveform over GEO satellite networks","authors":"F. Rossetto, M. Berioli","doi":"10.1109/ASMS-SPSC.2012.6333082","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333082","url":null,"abstract":"Single Carrier FDMA may offer important advantages for satellite networks, for instance in terms of increased spectral efficiency, compared to classic MF-TDMA multiple access schemes. This work studies the performance of synchronization procedures and provides indications on the system sizing when SC FDMA is employed over the return link of a GEO satellite system. It is shown how a DVB-RCS like closed loop synchronization can yield satisfactory results for stationary users, while it is still challenging to achieve the same results for mobile terminals.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"12 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":"126824006","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.2012.6333073
Cristina Ciochina-Duchesne, D. Castelain, A. Bouttier
Digital Video Broadcasting - Next Generation Handheld (DVB-NGH) is a hybrid terrestrial-satellite standard conceived to facilitate rich media content consumption using a variety of mobile, handheld devices. Still under drafting, the DVB-NGH specifications are to be released current 2012 with the target of offering superior performance, robustness and coverage with respect to existing solutions. The purpose of this paper is to give an overview of the physical layer of the satellite component of DVB-NGH and to give some insight on the motivation and technical choices that were made during the specification phase, with a focus on the waveform choice and on the pilot grid design.
{"title":"Satellite profile in DVB-NGH","authors":"Cristina Ciochina-Duchesne, D. Castelain, A. Bouttier","doi":"10.1109/ASMS-SPSC.2012.6333073","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333073","url":null,"abstract":"Digital Video Broadcasting - Next Generation Handheld (DVB-NGH) is a hybrid terrestrial-satellite standard conceived to facilitate rich media content consumption using a variety of mobile, handheld devices. Still under drafting, the DVB-NGH specifications are to be released current 2012 with the target of offering superior performance, robustness and coverage with respect to existing solutions. The purpose of this paper is to give an overview of the physical layer of the satellite component of DVB-NGH and to give some insight on the motivation and technical choices that were made during the specification phase, with a focus on the waveform choice and on the pilot grid design.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"3 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":"131504633","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.2012.6333069
H. Blomenhofer, A. Pawlitzki, P. Rosenthal, Laura Escudero
Automatic Dependent Surveillance Broadcast (ADS-B) is a technology that enables Air Traffic Management (ATM) services by means of aircraft broadcasting signals including flight related information on a regular basis. Terrestrial-based ADS-B infrastructure is already deployed as alternative or add-on to radars. However, it is not feasible for remote, polar, and oceanic areas, accounting for 71% of the world surface. Space-based ADS-B is an innovative technology that covers this gap by making use of satellites to provide global coverage. Thales Alenia Space Deutschland GmbH is leading the “Space Based ADS-B In-Orbit Demonstration Payload Development for Air Traffic Surveillance Project” (SABIP) under the framework of the European Space Agency (ESA) General Support Technology Program (GSTP). This project is mainly aimed at demonstrating the functionality of this technology under representative space environment conditions, and to verifying the link budget of this payload for the various ADS-B compatible equipment onboard aircraft on different geo-locations. This paper goes through the mission requirements that drive the payload system design and introduces an advanced architecture, consisting of a dedicated antenna and a receiver unit. Likewise, it introduces benefits behind the development of this technology. ESA's support for the In-Orbit Demonstration (IOD) of this technology, expected in the final phase of this project, is key to lower the technical risks and hence, helps introduce this new technology.
{"title":"Space-based Automatic Dependent Surveillance Broadcast (ADS-B) payload for In-Orbit Demonstration","authors":"H. Blomenhofer, A. Pawlitzki, P. Rosenthal, Laura Escudero","doi":"10.1109/ASMS-SPSC.2012.6333069","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333069","url":null,"abstract":"Automatic Dependent Surveillance Broadcast (ADS-B) is a technology that enables Air Traffic Management (ATM) services by means of aircraft broadcasting signals including flight related information on a regular basis. Terrestrial-based ADS-B infrastructure is already deployed as alternative or add-on to radars. However, it is not feasible for remote, polar, and oceanic areas, accounting for 71% of the world surface. Space-based ADS-B is an innovative technology that covers this gap by making use of satellites to provide global coverage. Thales Alenia Space Deutschland GmbH is leading the “Space Based ADS-B In-Orbit Demonstration Payload Development for Air Traffic Surveillance Project” (SABIP) under the framework of the European Space Agency (ESA) General Support Technology Program (GSTP). This project is mainly aimed at demonstrating the functionality of this technology under representative space environment conditions, and to verifying the link budget of this payload for the various ADS-B compatible equipment onboard aircraft on different geo-locations. This paper goes through the mission requirements that drive the payload system design and introduces an advanced architecture, consisting of a dedicated antenna and a receiver unit. Likewise, it introduces benefits behind the development of this technology. ESA's support for the In-Orbit Demonstration (IOD) of this technology, expected in the final phase of this project, is key to lower the technical risks and hence, helps introduce this new technology.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"58 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":"134527589","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.2012.6333063
M. Angelone, A. Ginesi, E. Re, S. Cioni
The growing demand for two-way broadband satellite services has pushed for the development of the DVB-RCS2 standard to improve the performance of the reverse link. Among the enhancements brought by the new standard, a wide range of modulation and coding schemes allows Interference and Fading Mitigation Techniques (IFMTs) to more efficiently exploit the diverse temporal and geographical propagation channel attenuations. In addition, the rich intra-system interference environment typical of large multi-spot beam network with high frequency re-use, and the constraints on the desired user QoS, call for a clever combination of different techniques. However, the effective implementation of the techniques is not trivial and the consequent benefits require the exploitation of complex computer-based system simulation tools. In this paper we compare the performance obtained for a DVB-RCS2 system using Adaptive Coding and Modulation (ACM) with those ones achieved by combining Dynamic Rate Adaptation (DRA) and ACM. The considered reference system is ka-band multi-spot beam network, which is deemed to follow within the next few years the current generation of ka-band HTS (High Throughput Satellites) networks.
{"title":"Performance of a combined dynamic rate adaptation and adaptive coding modulation technique for a DVB-RCS2 system","authors":"M. Angelone, A. Ginesi, E. Re, S. Cioni","doi":"10.1109/ASMS-SPSC.2012.6333063","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333063","url":null,"abstract":"The growing demand for two-way broadband satellite services has pushed for the development of the DVB-RCS2 standard to improve the performance of the reverse link. Among the enhancements brought by the new standard, a wide range of modulation and coding schemes allows Interference and Fading Mitigation Techniques (IFMTs) to more efficiently exploit the diverse temporal and geographical propagation channel attenuations. In addition, the rich intra-system interference environment typical of large multi-spot beam network with high frequency re-use, and the constraints on the desired user QoS, call for a clever combination of different techniques. However, the effective implementation of the techniques is not trivial and the consequent benefits require the exploitation of complex computer-based system simulation tools. In this paper we compare the performance obtained for a DVB-RCS2 system using Adaptive Coding and Modulation (ACM) with those ones achieved by combining Dynamic Rate Adaptation (DRA) and ACM. The considered reference system is ka-band multi-spot beam network, which is deemed to follow within the next few years the current generation of ka-band HTS (High Throughput Satellites) networks.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"35 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":"124254229","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.2012.6333099
J. Ebert, H. Schlemmer, W. Gappmair
Estimation of carrier parameters is of paramount importance in digital communications so as to satisfy the requirements in terms of availability and throughput. This is particularly challenging for systems operated in burst mode, where carrier frequency and phase estimates must be computed for each packet or frame. In this context, the reliability of frequency estimates might be a major problem, in case they are provided under low SNR conditions. Enlarging the observation length is basically possible, but this has to be paid by an increase of complexity and redundancy. In order to avoid this dilemma, an algorithm for frequency estimation through phase estimation (FEPE) has been suggested in the technical literature, which is both simple and powerful. Motivated by this approach, we propose that the operation of the FEPE module is closely linked to that of a duo-binary turbo decoder, establishing this way the code-aided joint recovery of carrier and data. Appropriately selected simulation results confirm the utility of the introduced concept.
{"title":"The code-aided FEPE algorithm for joint frequency and phase estimation at Low SNR","authors":"J. Ebert, H. Schlemmer, W. Gappmair","doi":"10.1109/ASMS-SPSC.2012.6333099","DOIUrl":"https://doi.org/10.1109/ASMS-SPSC.2012.6333099","url":null,"abstract":"Estimation of carrier parameters is of paramount importance in digital communications so as to satisfy the requirements in terms of availability and throughput. This is particularly challenging for systems operated in burst mode, where carrier frequency and phase estimates must be computed for each packet or frame. In this context, the reliability of frequency estimates might be a major problem, in case they are provided under low SNR conditions. Enlarging the observation length is basically possible, but this has to be paid by an increase of complexity and redundancy. In order to avoid this dilemma, an algorithm for frequency estimation through phase estimation (FEPE) has been suggested in the technical literature, which is both simple and powerful. Motivated by this approach, we propose that the operation of the FEPE module is closely linked to that of a duo-binary turbo decoder, establishing this way the code-aided joint recovery of carrier and data. Appropriately selected simulation results confirm the utility of the introduced concept.","PeriodicalId":303959,"journal":{"name":"2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC)","volume":"96 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":"123479102","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：