Konstantinos Liolis - Academia.edu (original) (raw)
Papers by Konstantinos Liolis
Proceedings of the 15th International Academic MindTrek Conference on Envisioning Future Media Environments - MindTrek '11, 2011
ABSTRACT Aging people are in risk of social isolation due to direct or indirect effects of aging.... more ABSTRACT Aging people are in risk of social isolation due to direct or indirect effects of aging. Social isolation decreases the quality of life, health and acts against independent living, which is important for both the elderly people and society. Social networking can provide elders a sense of presence with their relatives, friends and healthcare personnel which counteract the effects aging causes to their social connections. In this research a special social networking system is designed and provided for the elderly to answer their communication needs. To collect information on the achieved benefits of the system, a selected group of elders will use the system in their everyday lives in field trials for several months.
2010 5th Advanced Satellite Multimedia Systems Conference and the 11th Signal Processing for Space Communications Workshop, 2010
This paper presents the design, implementation and demonstration results from the ongoing ESA ART... more This paper presents the design, implementation and demonstration results from the ongoing ESA ARTES project “SFEDONA”. The SFEDONA project deals with a complete end-to-end fire detection and alerting application which employs state-of-the-art satellite and wireless communications air interfaces as well as advanced technologies in fire detection, alerting and propagation estimation based on terrestrial optical cameras, weather meteorological stations and environmental
Proceedings of the 5th International Conference on PErvasive Technologies Related to Assistive Environments - PETRA '12, 2012
ABSTRACT Aging people are in risk of social isolation due to direct or indirect effects of ageing... more ABSTRACT Aging people are in risk of social isolation due to direct or indirect effects of ageing. Social isolation decreases the quality of life, affects health and acts against independent living, which is important for both the elderly and the society. Social networking can provide elderly a sense of presence with their "safety-net", that is, relatives, friends and healthcare personnel that counteract the effects ageing causes to their social connections. In this paper, the design of an advanced socially assistive networking system is presented which provides the elderly the opportunity to enforce their connectivity with their safety-net. Specifically, attention is given to the design of a core service platform managing all requests between elderly and their safety-net, and to the design of elderly home terminal as well as to the design of mobile and Web pervasive applications for the members of the safety-net. Moreover, a user-centered approach is presented for the design of the overall system where special emphasis is put on usability and HCI.
2008 4th Advanced Satellite Mobile Systems, 2008
This paper addresses the applicability of single-input multiple-output (SIMO) technology to land ... more This paper addresses the applicability of single-input multiple-output (SIMO) technology to land mobile satellite (LMS) communications and proposes a fully parameterized statistical model, which can be used to accurately characterize SIMO-LMS channels. Specifically, it focuses on the careful consolidation of currently available experimental results for "conventional" SISO-LMS and terrestrial MIMO channels, and on their novel extrapolation to the SIMO-LMS case of interest for the accurate statistical modeling of L/S-band correlated, both spatially and temporarily, SIMO-LMS channels. Moreover, based on the proposed channel model, the channel capacity statistics as well as the error performance of a SIMO-LMS diversity system, assuming both maximal ratio combining (MRC) and selection combining (SC), are evaluated through detailed computer simulations. Useful numerical results on the capacity and diversity gains achieved are also provided taking into account several critical operational system parameters.
IEEE Transactions on Communications, 2000
This paper investigates the applicability of multipleinput-multiple-output (MIMO) technology to b... more This paper investigates the applicability of multipleinput-multiple-output (MIMO) technology to broadband fixed wireless access (BFWA) systems operating in the 10-66GHz frequency range. In order to employ the MIMO principle at these frequencies, the spatial channel benefits that may arise from the rainfall spatial inhomogeneity are more relevant since multipath is insignificant. Therefore, a special MIMO/BFWA channel may be implemented if every subscriber is equipped with multiple antennas and communicates with multiple base stations. The exact relationship between conventional MIMO and the proposed 10-66GHz MIMO/BFWA channels is established. Then, emphasis is put on two different topics from the field of MIMO applications: (i) capacity enhancement for spatial multiplexed MIMO/BFWA systems; and (ii) interference reduction for MIMO/BFWA diversity systems employing receive antenna selection. More specifically, in the first case, a communication-oriented single-user capacity analysis of a 2 × 2 MIMO/BFWA spatial multiplexing system is presented, the relevant optimal power allocation policy is explored and useful analytical expressions are derived for the outage capacity achieved in the asymptotically low and high SNR regions. The effect of feedback on the capacity is investigated and quantified through Monte Carlo simulations. In the second case, a 2 × 2 MIMO/BFWA diversity system with receive selection combining is considered and its efficiency to mitigate intrasystem/intersystem cochannel interference over the downstream channel is studied from a propagation point of view. A general analytical prediction model for the interference reduction obtained by such a 2×2 MIMO/BFWA diversity system is presented along with a numerical validation.
IEEE Communications Letters, 2000
Page 1. IEEE COMMUNICATIONS LETTERS, VOL. 11, NO. 4, APRIL 2007 301 Rician K-Factor Distribution ... more Page 1. IEEE COMMUNICATIONS LETTERS, VOL. 11, NO. 4, APRIL 2007 301 Rician K-Factor Distribution in Broadband Fixed Wireless Access Channels under Rain Fades Athanasios D. Panagopoulos, Member, IEEE, Konstantinos ...
![Research paper thumbnail of Bit-Error Outage over SIMO Spatially Correlated Rain-Fading Channels [Wireless Corner]](https://attachments.academia-assets.com/40475397/thumbnails/1.jpg)
](IEEE Antennas and Propagation Magazine, 2000
In this paper, a propagation model is presented for the bit-error outage probability (BEOP) in di... more In this paper, a propagation model is presented for the bit-error outage probability (BEOP) in distributed single-input multiple output (SIMO) correlated rain-fading channels. The general case of unbalanced spatial-diversity reception is considered. Such rain-fading channels usually represent terrestrial millimeter-wave line-of-sight (LOS) broadband fixed-wireless-access (BFWA) channels, operating at frequencies above 10 GHz. Useful numerical results regarding the validity of the proposed model are obtained to investigate the effects of spatial correlation and unequal diversity branch gains on the bit-error outage. The flexibility and global-scale applicability of the proposed propagation model for BEOP is also numerically demonstrated.
Proceeding of the 16th International Academic MindTrek Conference on - MindTrek '12, 2012
ABSTRACT The number of elderly people is increasing rapidly both in absolute numbers and in relat... more ABSTRACT The number of elderly people is increasing rapidly both in absolute numbers and in relation to younger population. It is the benefit for both the elders and the communities that elderly people continue to live in their own homes as long as possible. Therefore technology should be used to help the elders in their homes. As loneliness and social isolation have negative impact on the health and happiness of the older population, ambient devices and social networking may be used to help the elderly connect with their friends and families. In this paper we will demonstrate our solution, the Amcosop system, which will help elders feel safe and keep connected with their nearest and dearest.
IEEE Wireless Communications Letters, 2015
Deploying high throughput satellite systems in Ka band to accommodate the ever increasing demand ... more Deploying high throughput satellite systems in Ka band to accommodate the ever increasing demand for high data rates hits a spectrum barrier. Cognitive spectrum utilization of the allocated frequency bands to other services is a potential solution. Designing a cognitive zone around incumbent broadcasting satellite service (BSS) feeder links beyond which the cognitive fixed satellite service (FSS) terminals can freely utilize the same frequency band is considered in this paper. In addition, we show that there is a rain rate called rain wall, above which cognitive downlink communications becomes infeasible.
IEEE Communications Magazine, 2015
Multibeam satellite networks in Ka band have been designed to accommodate the increasing traffic ... more Multibeam satellite networks in Ka band have been designed to accommodate the increasing traffic demands of the coming years. However, these systems are spectrum limited due to the current spectrum allocation policies. This paper investigates the potentials of applying cognitive radio techniques in satellite communications in order to increase the spectrum opportunities for future generation of satellite networks without interfering operation of incumbent services. These extra spectrum opportunities can potentially amount to 2.4 GHz of bandwidth in downlink, and to 2 GHz of bandwidth in uplink for high density fixed satellite services (HDFSS).
30th AIAA International Communications Satellite System Conference (ICSSC), 2012
N the last few years there is pressure on the current Internet architecture to meet new and emerg... more N the last few years there is pressure on the current Internet architecture to meet new and emerging needs of its users. Inefficiencies of the current Internet architecture with regard to, eg, mobility support, traffic management or content delivery, have been highlighted along with the complexities of proposed work-arounds or patches, which
2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL), 2012
This paper discusses the integration of satellite and terrestrial networks over an Information Ce... more This paper discusses the integration of satellite and terrestrial networks over an Information Centric Networking (ICN) architecture. Focus is given on the identification of the key features that characterize ICN architectures and how these may impact, but also be affected by, the integration of satellite and terrestrial networks. The work presented contains intermediate results obtained as part of the ongoing ESA ARTES study ' SAT' on the role of satellites in the Future Internet.
2008 10th International Workshop on Signal Processing for Space Communications, 2008
This paper investigates the design of power and spectrally efficient coded modulations based on a... more This paper investigates the design of power and spectrally efficient coded modulations based on amplitude phase shift keying (APSK) with application to broadband satellite communications. Emphasis is put on 64APSK constellations. The APSK modulation has merits for digital transmission over nonlinear satellite channels due to its power and spectral efficiency combined with its inherent robustness against nonlinear distortion. This scheme has been adopted in the DVB-S2 Standard for satellite digital video broadcasting. Assuming an ideal rectangular transmission pulse, for which no nonlinear inter-symbol interference is present and perfect precompensation of the nonlinearity takes place, we optimize the 64APSK constellation design by employing an optimization criterion based on the mutual information. This method generates an optimum constellation for each operating SNR point, that is, for each spectral efficiency. Two separate cases of interest are particularly examined: (i) the equiprobable case, where all constellation points are equiprobable and (ii) the nonequiprobable case, where the constellation points on each ring are assumed to be equiprobable but the a priory symbol probability associated per ring is assumed different for each ring. Following the mutual information-based optimization approach in each case, detailed simulation results are obtained for the optimal 64APSK constellation settings as well as the achievable shaping gain.
2007 International Workshop on Satellite and Space Communications, 2007
ABSTRACT This paper addresses the applicability of fade mitigation techniques (FMTs) to mobile DV... more ABSTRACT This paper addresses the applicability of fade mitigation techniques (FMTs) to mobile DVB-S2/RCS based broadband interactive satellite systems. Emphasis is put on the railway scenario, where quite a few pilot projects and demonstration initiatives have already been launched and even (pre-) commercial activities have already commenced. A useful methodology to transform rain fading statistics from a fixed to a mobile satellite communication system is described. Particular attention is paid to the second order rain fading statistics and, specifically, to the rain fade slope, whose accurate knowledge is essential to the design and performance of the FMT control loop. The FMT control loop margin required due to mobility is estimated in line-of-sight (LOS) conditions for different train speeds and rain attenuation levels. In addition, the impact of non-LOS effects, such as long blockages due to tunnels, on the performance of FMT control loop is examined and the possible use of short-term rain fade prediction methods is analyzed. Numerical results obtained through computer simulations are provided and useful conclusions are drawn.
2010 5th Advanced Satellite Multimedia Systems Conference and the 11th Signal Processing for Space Communications Workshop, 2010
Nicolas CHUBERRE, Mauro PICCINNI, Jean-François BOUTILLON, Angel ALVARO SANCHEZ, Juan Manuel RODR... more Nicolas CHUBERRE, Mauro PICCINNI, Jean-François BOUTILLON, Angel ALVARO SANCHEZ, Juan Manuel RODRIGUEZ BEJARANO Thales Alenia Space, Business Line Telecommunication 26 av. JF Champollion, 31037, Toulouse Cedex, France nicolas.chuberre@ ...
Physical Communication, 2011
The Quality of Service (QoS) in land mobile satellite (LMS) communications drops drastically in t... more The Quality of Service (QoS) in land mobile satellite (LMS) communications drops drastically in the presence of shadowing and multipath fading. This paper studies two promising multiple-input multiple-output (MIMO) schemes, along with specific transmission techniques, aimed at overcoming this problem. First, specific proposals for a dual-satellite distributed MIMO scheme are studied based upon delay-tolerant and spectral-efficient schemes. As a second
IEEE Transactions on Vehicular Technology, 2000
Page 1. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 59, NO. 3, MARCH 2010 1109 On the Combina... more Page 1. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 59, NO. 3, MARCH 2010 1109 On the Combination of Tropospheric and Local Environment Propagation Effects for Mobile Satellite Systems Above 10 GHz ...
IEEE Communications Surveys & Tutorials, 2000
The present article carries out a review of MIMObased techniques that have been recently proposed... more The present article carries out a review of MIMObased techniques that have been recently proposed for satellite communications. Due to the plethora of MIMO interpretations in terrestrial systems and the particularities of satellite communications, this review is built on two pillars, namely fixed satellite and mobile satellite. Special attention is given to the characteristics of the satellite channel, which will ultimately determine the viability of MIMO over satellite. Finally, some future research directions are identified.
Proceedings of the 15th International Academic MindTrek Conference on Envisioning Future Media Environments - MindTrek '11, 2011
ABSTRACT Aging people are in risk of social isolation due to direct or indirect effects of aging.... more ABSTRACT Aging people are in risk of social isolation due to direct or indirect effects of aging. Social isolation decreases the quality of life, health and acts against independent living, which is important for both the elderly people and society. Social networking can provide elders a sense of presence with their relatives, friends and healthcare personnel which counteract the effects aging causes to their social connections. In this research a special social networking system is designed and provided for the elderly to answer their communication needs. To collect information on the achieved benefits of the system, a selected group of elders will use the system in their everyday lives in field trials for several months.
2010 5th Advanced Satellite Multimedia Systems Conference and the 11th Signal Processing for Space Communications Workshop, 2010
This paper presents the design, implementation and demonstration results from the ongoing ESA ART... more This paper presents the design, implementation and demonstration results from the ongoing ESA ARTES project “SFEDONA”. The SFEDONA project deals with a complete end-to-end fire detection and alerting application which employs state-of-the-art satellite and wireless communications air interfaces as well as advanced technologies in fire detection, alerting and propagation estimation based on terrestrial optical cameras, weather meteorological stations and environmental
Proceedings of the 5th International Conference on PErvasive Technologies Related to Assistive Environments - PETRA '12, 2012
ABSTRACT Aging people are in risk of social isolation due to direct or indirect effects of ageing... more ABSTRACT Aging people are in risk of social isolation due to direct or indirect effects of ageing. Social isolation decreases the quality of life, affects health and acts against independent living, which is important for both the elderly and the society. Social networking can provide elderly a sense of presence with their "safety-net", that is, relatives, friends and healthcare personnel that counteract the effects ageing causes to their social connections. In this paper, the design of an advanced socially assistive networking system is presented which provides the elderly the opportunity to enforce their connectivity with their safety-net. Specifically, attention is given to the design of a core service platform managing all requests between elderly and their safety-net, and to the design of elderly home terminal as well as to the design of mobile and Web pervasive applications for the members of the safety-net. Moreover, a user-centered approach is presented for the design of the overall system where special emphasis is put on usability and HCI.
2008 4th Advanced Satellite Mobile Systems, 2008
This paper addresses the applicability of single-input multiple-output (SIMO) technology to land ... more This paper addresses the applicability of single-input multiple-output (SIMO) technology to land mobile satellite (LMS) communications and proposes a fully parameterized statistical model, which can be used to accurately characterize SIMO-LMS channels. Specifically, it focuses on the careful consolidation of currently available experimental results for "conventional" SISO-LMS and terrestrial MIMO channels, and on their novel extrapolation to the SIMO-LMS case of interest for the accurate statistical modeling of L/S-band correlated, both spatially and temporarily, SIMO-LMS channels. Moreover, based on the proposed channel model, the channel capacity statistics as well as the error performance of a SIMO-LMS diversity system, assuming both maximal ratio combining (MRC) and selection combining (SC), are evaluated through detailed computer simulations. Useful numerical results on the capacity and diversity gains achieved are also provided taking into account several critical operational system parameters.
IEEE Transactions on Communications, 2000
This paper investigates the applicability of multipleinput-multiple-output (MIMO) technology to b... more This paper investigates the applicability of multipleinput-multiple-output (MIMO) technology to broadband fixed wireless access (BFWA) systems operating in the 10-66GHz frequency range. In order to employ the MIMO principle at these frequencies, the spatial channel benefits that may arise from the rainfall spatial inhomogeneity are more relevant since multipath is insignificant. Therefore, a special MIMO/BFWA channel may be implemented if every subscriber is equipped with multiple antennas and communicates with multiple base stations. The exact relationship between conventional MIMO and the proposed 10-66GHz MIMO/BFWA channels is established. Then, emphasis is put on two different topics from the field of MIMO applications: (i) capacity enhancement for spatial multiplexed MIMO/BFWA systems; and (ii) interference reduction for MIMO/BFWA diversity systems employing receive antenna selection. More specifically, in the first case, a communication-oriented single-user capacity analysis of a 2 × 2 MIMO/BFWA spatial multiplexing system is presented, the relevant optimal power allocation policy is explored and useful analytical expressions are derived for the outage capacity achieved in the asymptotically low and high SNR regions. The effect of feedback on the capacity is investigated and quantified through Monte Carlo simulations. In the second case, a 2 × 2 MIMO/BFWA diversity system with receive selection combining is considered and its efficiency to mitigate intrasystem/intersystem cochannel interference over the downstream channel is studied from a propagation point of view. A general analytical prediction model for the interference reduction obtained by such a 2×2 MIMO/BFWA diversity system is presented along with a numerical validation.
IEEE Communications Letters, 2000
Page 1. IEEE COMMUNICATIONS LETTERS, VOL. 11, NO. 4, APRIL 2007 301 Rician K-Factor Distribution ... more Page 1. IEEE COMMUNICATIONS LETTERS, VOL. 11, NO. 4, APRIL 2007 301 Rician K-Factor Distribution in Broadband Fixed Wireless Access Channels under Rain Fades Athanasios D. Panagopoulos, Member, IEEE, Konstantinos ...
IEEE Antennas and Propagation Magazine, 2000
In this paper, a propagation model is presented for the bit-error outage probability (BEOP) in di... more In this paper, a propagation model is presented for the bit-error outage probability (BEOP) in distributed single-input multiple output (SIMO) correlated rain-fading channels. The general case of unbalanced spatial-diversity reception is considered. Such rain-fading channels usually represent terrestrial millimeter-wave line-of-sight (LOS) broadband fixed-wireless-access (BFWA) channels, operating at frequencies above 10 GHz. Useful numerical results regarding the validity of the proposed model are obtained to investigate the effects of spatial correlation and unequal diversity branch gains on the bit-error outage. The flexibility and global-scale applicability of the proposed propagation model for BEOP is also numerically demonstrated.
Proceeding of the 16th International Academic MindTrek Conference on - MindTrek '12, 2012
ABSTRACT The number of elderly people is increasing rapidly both in absolute numbers and in relat... more ABSTRACT The number of elderly people is increasing rapidly both in absolute numbers and in relation to younger population. It is the benefit for both the elders and the communities that elderly people continue to live in their own homes as long as possible. Therefore technology should be used to help the elders in their homes. As loneliness and social isolation have negative impact on the health and happiness of the older population, ambient devices and social networking may be used to help the elderly connect with their friends and families. In this paper we will demonstrate our solution, the Amcosop system, which will help elders feel safe and keep connected with their nearest and dearest.
IEEE Wireless Communications Letters, 2015
Deploying high throughput satellite systems in Ka band to accommodate the ever increasing demand ... more Deploying high throughput satellite systems in Ka band to accommodate the ever increasing demand for high data rates hits a spectrum barrier. Cognitive spectrum utilization of the allocated frequency bands to other services is a potential solution. Designing a cognitive zone around incumbent broadcasting satellite service (BSS) feeder links beyond which the cognitive fixed satellite service (FSS) terminals can freely utilize the same frequency band is considered in this paper. In addition, we show that there is a rain rate called rain wall, above which cognitive downlink communications becomes infeasible.
IEEE Communications Magazine, 2015
Multibeam satellite networks in Ka band have been designed to accommodate the increasing traffic ... more Multibeam satellite networks in Ka band have been designed to accommodate the increasing traffic demands of the coming years. However, these systems are spectrum limited due to the current spectrum allocation policies. This paper investigates the potentials of applying cognitive radio techniques in satellite communications in order to increase the spectrum opportunities for future generation of satellite networks without interfering operation of incumbent services. These extra spectrum opportunities can potentially amount to 2.4 GHz of bandwidth in downlink, and to 2 GHz of bandwidth in uplink for high density fixed satellite services (HDFSS).
30th AIAA International Communications Satellite System Conference (ICSSC), 2012
N the last few years there is pressure on the current Internet architecture to meet new and emerg... more N the last few years there is pressure on the current Internet architecture to meet new and emerging needs of its users. Inefficiencies of the current Internet architecture with regard to, eg, mobility support, traffic management or content delivery, have been highlighted along with the complexities of proposed work-arounds or patches, which
2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL), 2012
This paper discusses the integration of satellite and terrestrial networks over an Information Ce... more This paper discusses the integration of satellite and terrestrial networks over an Information Centric Networking (ICN) architecture. Focus is given on the identification of the key features that characterize ICN architectures and how these may impact, but also be affected by, the integration of satellite and terrestrial networks. The work presented contains intermediate results obtained as part of the ongoing ESA ARTES study ' SAT' on the role of satellites in the Future Internet.
2008 10th International Workshop on Signal Processing for Space Communications, 2008
This paper investigates the design of power and spectrally efficient coded modulations based on a... more This paper investigates the design of power and spectrally efficient coded modulations based on amplitude phase shift keying (APSK) with application to broadband satellite communications. Emphasis is put on 64APSK constellations. The APSK modulation has merits for digital transmission over nonlinear satellite channels due to its power and spectral efficiency combined with its inherent robustness against nonlinear distortion. This scheme has been adopted in the DVB-S2 Standard for satellite digital video broadcasting. Assuming an ideal rectangular transmission pulse, for which no nonlinear inter-symbol interference is present and perfect precompensation of the nonlinearity takes place, we optimize the 64APSK constellation design by employing an optimization criterion based on the mutual information. This method generates an optimum constellation for each operating SNR point, that is, for each spectral efficiency. Two separate cases of interest are particularly examined: (i) the equiprobable case, where all constellation points are equiprobable and (ii) the nonequiprobable case, where the constellation points on each ring are assumed to be equiprobable but the a priory symbol probability associated per ring is assumed different for each ring. Following the mutual information-based optimization approach in each case, detailed simulation results are obtained for the optimal 64APSK constellation settings as well as the achievable shaping gain.
2007 International Workshop on Satellite and Space Communications, 2007
ABSTRACT This paper addresses the applicability of fade mitigation techniques (FMTs) to mobile DV... more ABSTRACT This paper addresses the applicability of fade mitigation techniques (FMTs) to mobile DVB-S2/RCS based broadband interactive satellite systems. Emphasis is put on the railway scenario, where quite a few pilot projects and demonstration initiatives have already been launched and even (pre-) commercial activities have already commenced. A useful methodology to transform rain fading statistics from a fixed to a mobile satellite communication system is described. Particular attention is paid to the second order rain fading statistics and, specifically, to the rain fade slope, whose accurate knowledge is essential to the design and performance of the FMT control loop. The FMT control loop margin required due to mobility is estimated in line-of-sight (LOS) conditions for different train speeds and rain attenuation levels. In addition, the impact of non-LOS effects, such as long blockages due to tunnels, on the performance of FMT control loop is examined and the possible use of short-term rain fade prediction methods is analyzed. Numerical results obtained through computer simulations are provided and useful conclusions are drawn.
2010 5th Advanced Satellite Multimedia Systems Conference and the 11th Signal Processing for Space Communications Workshop, 2010
Nicolas CHUBERRE, Mauro PICCINNI, Jean-François BOUTILLON, Angel ALVARO SANCHEZ, Juan Manuel RODR... more Nicolas CHUBERRE, Mauro PICCINNI, Jean-François BOUTILLON, Angel ALVARO SANCHEZ, Juan Manuel RODRIGUEZ BEJARANO Thales Alenia Space, Business Line Telecommunication 26 av. JF Champollion, 31037, Toulouse Cedex, France nicolas.chuberre@ ...
Physical Communication, 2011
The Quality of Service (QoS) in land mobile satellite (LMS) communications drops drastically in t... more The Quality of Service (QoS) in land mobile satellite (LMS) communications drops drastically in the presence of shadowing and multipath fading. This paper studies two promising multiple-input multiple-output (MIMO) schemes, along with specific transmission techniques, aimed at overcoming this problem. First, specific proposals for a dual-satellite distributed MIMO scheme are studied based upon delay-tolerant and spectral-efficient schemes. As a second
IEEE Transactions on Vehicular Technology, 2000
Page 1. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 59, NO. 3, MARCH 2010 1109 On the Combina... more Page 1. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 59, NO. 3, MARCH 2010 1109 On the Combination of Tropospheric and Local Environment Propagation Effects for Mobile Satellite Systems Above 10 GHz ...
IEEE Communications Surveys & Tutorials, 2000
The present article carries out a review of MIMObased techniques that have been recently proposed... more The present article carries out a review of MIMObased techniques that have been recently proposed for satellite communications. Due to the plethora of MIMO interpretations in terrestrial systems and the particularities of satellite communications, this review is built on two pillars, namely fixed satellite and mobile satellite. Special attention is given to the characteristics of the satellite channel, which will ultimately determine the viability of MIMO over satellite. Finally, some future research directions are identified.