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Marie-laure Boucheret - One of the best experts on this subject based on the ideXlab platform.

  • Exact Outage Probability of a Hybrid Satellite Terrestrial Cooperative System with Best Relay Selection
    2013
    Co-Authors: Sokchenda Sreng, Benoît Escrig, Marie-laure Boucheret
    Abstract:

    In this paper, we derive the exact outage probability of a hybrid satellite-terrestrial cooperative system (HSTCS). A selective decode-and-forward scheme is implemented between a source Node (the satellite) and a Destination Node (a terrestrial station), and a selection of the best relay terminal is performed. In this proposed system, a two time-slot scenario is considered. During the first time slot, the satellite is broadcasting the information to the terrestrial relays and the Destination. In the second time slot, only the best relay is transmitting toward the Destination Node. Then, both signals are combined using the maximum ratio combining (MRC) technique. The analytical expression of the outage probability is evaluated and is then verified with the simulation. The results show that our analytical expression matched well to the simulation results.

  • Exact Symbol Error Probability of Hybrid/Integrated Satellite-Terrestrial Cooperative Network
    IEEE Transactions on Wireless Communications, 2013
    Co-Authors: Sokchenda Sreng, Benoît Escrig, Marie-laure Boucheret
    Abstract:

    In this paper, we study the Symbol Error Probability (SEP) performance of a hybrid/integrated satellite-terrestrial cooperative network. In particular, we focus on the case of mobile relays that forward the satellite signal to a masked mobile Destination Node. The Selective Decode-and-Forward (SDF) transmission scheme is implemented and only the relay Nodes which can successfully decode the satellite message are selected to retransmit the signal. The Destination Node exploits the spatial diversity advantages by implementing a typical Maximum Ratio Combining (MRC) technique. The closed-form expressions for the exact average SEP of the arbitrary M-ary phase shift keying and M-ary quadrature amplitude modulation signaling with MRC diversity reception over independent but not necessarily identically distributed fading channels are derived using a Moment Generating Function (MGF) approach. These closed-form expressions are represented in terms of a finite sum of Lauricella hypergeometric functions. The analytical expressions show excellent agreement with the simulation results. Numerical results show that for a system using QPSK under the frequent heavy shadowed fading condition, the diversity gain of approximately 7 dB can be obtained at the SEP of 10^{-1} with respect to the direct transmission, when only one relay is used. It increases to around 12 dB in the case of 3 relays.

Sokchenda Sreng - One of the best experts on this subject based on the ideXlab platform.

  • Exact Outage Probability of a Hybrid Satellite Terrestrial Cooperative System with Best Relay Selection
    2013
    Co-Authors: Sokchenda Sreng, Benoît Escrig, Marie-laure Boucheret
    Abstract:

    In this paper, we derive the exact outage probability of a hybrid satellite-terrestrial cooperative system (HSTCS). A selective decode-and-forward scheme is implemented between a source Node (the satellite) and a Destination Node (a terrestrial station), and a selection of the best relay terminal is performed. In this proposed system, a two time-slot scenario is considered. During the first time slot, the satellite is broadcasting the information to the terrestrial relays and the Destination. In the second time slot, only the best relay is transmitting toward the Destination Node. Then, both signals are combined using the maximum ratio combining (MRC) technique. The analytical expression of the outage probability is evaluated and is then verified with the simulation. The results show that our analytical expression matched well to the simulation results.

  • Exact Symbol Error Probability of Hybrid/Integrated Satellite-Terrestrial Cooperative Network
    IEEE Transactions on Wireless Communications, 2013
    Co-Authors: Sokchenda Sreng, Benoît Escrig, Marie-laure Boucheret
    Abstract:

    In this paper, we study the Symbol Error Probability (SEP) performance of a hybrid/integrated satellite-terrestrial cooperative network. In particular, we focus on the case of mobile relays that forward the satellite signal to a masked mobile Destination Node. The Selective Decode-and-Forward (SDF) transmission scheme is implemented and only the relay Nodes which can successfully decode the satellite message are selected to retransmit the signal. The Destination Node exploits the spatial diversity advantages by implementing a typical Maximum Ratio Combining (MRC) technique. The closed-form expressions for the exact average SEP of the arbitrary M-ary phase shift keying and M-ary quadrature amplitude modulation signaling with MRC diversity reception over independent but not necessarily identically distributed fading channels are derived using a Moment Generating Function (MGF) approach. These closed-form expressions are represented in terms of a finite sum of Lauricella hypergeometric functions. The analytical expressions show excellent agreement with the simulation results. Numerical results show that for a system using QPSK under the frequent heavy shadowed fading condition, the diversity gain of approximately 7 dB can be obtained at the SEP of 10^{-1} with respect to the direct transmission, when only one relay is used. It increases to around 12 dB in the case of 3 relays.

Benoît Escrig - One of the best experts on this subject based on the ideXlab platform.

  • Exact Outage Probability of a Hybrid Satellite Terrestrial Cooperative System with Best Relay Selection
    2013
    Co-Authors: Sokchenda Sreng, Benoît Escrig, Marie-laure Boucheret
    Abstract:

    In this paper, we derive the exact outage probability of a hybrid satellite-terrestrial cooperative system (HSTCS). A selective decode-and-forward scheme is implemented between a source Node (the satellite) and a Destination Node (a terrestrial station), and a selection of the best relay terminal is performed. In this proposed system, a two time-slot scenario is considered. During the first time slot, the satellite is broadcasting the information to the terrestrial relays and the Destination. In the second time slot, only the best relay is transmitting toward the Destination Node. Then, both signals are combined using the maximum ratio combining (MRC) technique. The analytical expression of the outage probability is evaluated and is then verified with the simulation. The results show that our analytical expression matched well to the simulation results.

  • Exact Symbol Error Probability of Hybrid/Integrated Satellite-Terrestrial Cooperative Network
    IEEE Transactions on Wireless Communications, 2013
    Co-Authors: Sokchenda Sreng, Benoît Escrig, Marie-laure Boucheret
    Abstract:

    In this paper, we study the Symbol Error Probability (SEP) performance of a hybrid/integrated satellite-terrestrial cooperative network. In particular, we focus on the case of mobile relays that forward the satellite signal to a masked mobile Destination Node. The Selective Decode-and-Forward (SDF) transmission scheme is implemented and only the relay Nodes which can successfully decode the satellite message are selected to retransmit the signal. The Destination Node exploits the spatial diversity advantages by implementing a typical Maximum Ratio Combining (MRC) technique. The closed-form expressions for the exact average SEP of the arbitrary M-ary phase shift keying and M-ary quadrature amplitude modulation signaling with MRC diversity reception over independent but not necessarily identically distributed fading channels are derived using a Moment Generating Function (MGF) approach. These closed-form expressions are represented in terms of a finite sum of Lauricella hypergeometric functions. The analytical expressions show excellent agreement with the simulation results. Numerical results show that for a system using QPSK under the frequent heavy shadowed fading condition, the diversity gain of approximately 7 dB can be obtained at the SEP of 10^{-1} with respect to the direct transmission, when only one relay is used. It increases to around 12 dB in the case of 3 relays.

Hock Beng Lim - One of the best experts on this subject based on the ideXlab platform.

  • K-hop statistics in wireless sensor networks
    2009 International Conference on Intelligent Sensors Sensor Networks and Information Processing (ISSNIP), 2009
    Co-Authors: Bang Wang, Hock Beng Lim
    Abstract:

    In WSNs (Wireless Sensor Networks), a source Node sends its packets via multi-hop relays to a Destination Node if the source Node cannot communicate with the Destination Node directly. A Destination's hop-count with respect to a source is the least number of multi-hop relays required for the source to reach it. Given a WSN whose Nodes are distributed randomly according to a homogeneous Poisson point process, we propose a method termed CSP (Convolution of Successive Progress) to compute the conditional probability that a Destination Node has hop-count h with respect to a source Node given that the the distance between the source and the Destination is d. We also extend the CSP method into three-dimensional networks. Simulation studies show that the proposed method is able to achieve significant error reduction in computing the conditional probability compared with existing methods.

De-chun Sun - One of the best experts on this subject based on the ideXlab platform.

  • AINA - A New Space Time Cooperative Diversity Scheme Based on Simple Feedback
    2009 International Conference on Advanced Information Networking and Applications, 2009
    Co-Authors: De-chun Sun
    Abstract:

    This article proposes a new space time cooperative diversity scheme called full feedback-based cooperative diversity scheme (FFBCD). In contrast to the conventional adaptive space time cooperative diversity schemes which utilize the feedback from only the Destination Node, the new scheme utilizes the feedback from both the Destination Node and the cooperation Node. With the feedback from the Destination Node, the occasional successful reception of the Destination Node in the information distribution stage can be detected, and so to avoid unnecessary retransmissions in the information delivery stage. The feedback from the cooperation Node indicates the receive state of the cooperation Node in the information distribution stage, and the source Node and the cooperation Node won’t perform cooperative retransmission during the information delivery stage unless the cooperation Node received successfully in the information distribution stage. In this way the new scheme can reduce the number of transmission attempt and improve the channel utilization. The expressions of the average number of transmission attempt are given. Numerical approximations and simulation results both show that the new scheme performs better than the non-cooperative scheme and the conventional adaptive space time cooperative diversity scheme.