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E Del Re - One of the best experts on this subject based on the ideXlab platform.
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cooperative delay diversity in hybrid satellite Terrestrial dvb sh system
International Conference on Communications, 2010Co-Authors: Simone Morosi, Sara Jayousi, E Del ReAbstract:In this paper we study simple and feasible cooperative relaying strategies which rely on the introduction of the Delay Diversity technique in a DVB-SH compliant hybrid satellite/Terrestrial Network. These strategies are investigated in a public emergency scenario where the adoption of a hybrid Network combined with the cooperative diversity techniques guarantees the connection between the incident area and the external areas: particularly, the drawbacks of the Non-Line-Of-Sight (NLOS) propagation are mitigated. The proposed schemes are analysed and compared, highlighting the assumptions required and the simulation results with respect to the satellite-only and the Terrestrial-only cases.
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ICC - Cooperative Delay Diversity in Hybrid Satellite/Terrestrial DVB-SH System
2010 IEEE International Conference on Communications, 2010Co-Authors: Simone Morosi, Sara Jayousi, E Del ReAbstract:In this paper we study simple and feasible cooperative relaying strategies which rely on the introduction of the Delay Diversity technique in a DVB-SH compliant hybrid satellite/Terrestrial Network. These strategies are investigated in a public emergency scenario where the adoption of a hybrid Network combined with the cooperative diversity techniques guarantees the connection between the incident area and the external areas: particularly, the drawbacks of the Non-Line-Of-Sight (NLOS) propagation are mitigated. The proposed schemes are analysed and compared, highlighting the assumptions required and the simulation results with respect to the satellite-only and the Terrestrial-only cases.
Markku Juntti - One of the best experts on this subject based on the ideXlab platform.
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GLOBECOM - Satellite Uplink Transmission with Terrestrial Network Interference
2015 IEEE Global Communications Conference (GLOBECOM), 2015Co-Authors: Janne Janhunen, Johanna Ketonen, Ari Hulkkonen, Juha Ylitalo, Antti Roivainen, Markku JunttiAbstract:The impact of the Terrestrial Network interference to a satellite uplink transmission is studied in this paper. In a system, where an LTE Terrestrial Network is extended by a satellite communication, the Terrestrial interference can become a problem. The interference levels are studied via infield measurements and link budget calculations and the interference tolerance of the satellite receiver are studied via computer simulations. The results show that in spite of the long satellite communication link, strictly power limited system and Terrestrial interference the satellite link can operate on the same frequency band as the Terrestrial Network.
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satellite uplink transmission with Terrestrial Network interference
Global Communications Conference, 2014Co-Authors: Janne Janhunen, Johanna Ketonen, Ari Hulkkonen, Juha Ylitalo, Antti Roivainen, Markku JunttiAbstract:The impact of the Terrestrial Network interference to a satellite uplink transmission is studied in this paper. In a system, where an LTE Terrestrial Network is extended by a satellite communication, the Terrestrial interference can become a problem. The interference levels are studied via infield measurements and link budget calculations and the interference tolerance of the satellite receiver are studied via computer simulations. The results show that in spite of the long satellite communication link, strictly power limited system and Terrestrial interference the satellite link can operate on the same frequency band as the Terrestrial Network.
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ICC - Performance of Terrestrial Network with the presence of overlay satellite Network
2013 IEEE International Conference on Communications (ICC), 2013Co-Authors: Antti Roivainen, Juha Ylitalo, Jukka Kyrolainen, Markku JunttiAbstract:In a hybrid (integrated) satellite-Terrestrial system users are provided services seamlessly via a satellite or a Terrestrial Network. One approach is to design the hybrid Network using frequency reuse in a way that satellite spot beams do not overlap the Terrestrial Network coverage area for the same frequency bandwidth. However, the satellite beams are drifting over time which inevitably causes interference to the Terrestrial Network. In this paper, another hybrid Network approach is studied in which the coverage of the satellite beam fully overlays the Terrestrial Network coverage. Specially, the performance of the 3GPP long term evolution (LTE) Network is studied in a suburban macrocell environment with the presence of interference from overlapping satellite Network. Simulation results are provided for base station (BS) intersite distance (ISD) of 3 km and 6 km assuming BS transmission power of 40 W. The bandwidth of 10 MHz was applied for the Terrestrial transmission and the bandwidths of 3, 5 and 10 MHz were assumed for the satellite transmission in order to study the partially and fully overlapping cases. The Terrestrial Network tolerance depends strongly on the Network planning issues such as the BS transmission power and the ISD of base stations. For the applied Terrestrial Network parameters, the system performance degradation due to satellite interference is small.
Simone Morosi - One of the best experts on this subject based on the ideXlab platform.
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cooperative delay diversity in hybrid satellite Terrestrial dvb sh system
International Conference on Communications, 2010Co-Authors: Simone Morosi, Sara Jayousi, E Del ReAbstract:In this paper we study simple and feasible cooperative relaying strategies which rely on the introduction of the Delay Diversity technique in a DVB-SH compliant hybrid satellite/Terrestrial Network. These strategies are investigated in a public emergency scenario where the adoption of a hybrid Network combined with the cooperative diversity techniques guarantees the connection between the incident area and the external areas: particularly, the drawbacks of the Non-Line-Of-Sight (NLOS) propagation are mitigated. The proposed schemes are analysed and compared, highlighting the assumptions required and the simulation results with respect to the satellite-only and the Terrestrial-only cases.
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ICC - Cooperative Delay Diversity in Hybrid Satellite/Terrestrial DVB-SH System
2010 IEEE International Conference on Communications, 2010Co-Authors: Simone Morosi, Sara Jayousi, E Del ReAbstract:In this paper we study simple and feasible cooperative relaying strategies which rely on the introduction of the Delay Diversity technique in a DVB-SH compliant hybrid satellite/Terrestrial Network. These strategies are investigated in a public emergency scenario where the adoption of a hybrid Network combined with the cooperative diversity techniques guarantees the connection between the incident area and the external areas: particularly, the drawbacks of the Non-Line-Of-Sight (NLOS) propagation are mitigated. The proposed schemes are analysed and compared, highlighting the assumptions required and the simulation results with respect to the satellite-only and the Terrestrial-only cases.
Janne Janhunen - One of the best experts on this subject based on the ideXlab platform.
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Hybrid satellite systems: extending Terrestrial Networks using satellites
Cooperative and Cognitive Satellite Systems, 2015Co-Authors: Juha Ylitalo, Janne Janhunen, Ari Hulkkonen, Marko Höyhtyä, Aaron Byman, Marko Leinonen, Antti RoivainenAbstract:In this chapter, we review principles of hybrid radio access systems that are able to provide both Terrestrial and satellite connectivity. Practical examples of the existing hybrid systems, such as digital video broadcasting-satellite services to handheld devices and TerreStar system, are also reviewed. The main focus is in the spectrum sharing challenges between the Terrestrial and satellite components. Accordingly, we discuss different cognitive hybrid system proposals and the related issues. We describe also a potential hybrid satellite concept for the S-band, which enables efficient deployment of the higher IMT (International Mobile Telecommunications) frequency bands by providing coverage to rural areas where building of a Terrestrial Network is not economically feasible. The proposed concept consists of a Terrestrial 3GPP (the 3rd Generation Partnership Project) LTE (Long-Term Evolution) Network in dense populated urban areas and of cochannel satellite LTE cells in low populated areas. Simulation results of this overlay scenario are presented showing that the satellite interference to the Terrestrial Network can be kept at an acceptable level. Finally, future directions for the hybrid satellite systems are addressed.
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GLOBECOM - Satellite Uplink Transmission with Terrestrial Network Interference
2015 IEEE Global Communications Conference (GLOBECOM), 2015Co-Authors: Janne Janhunen, Johanna Ketonen, Ari Hulkkonen, Juha Ylitalo, Antti Roivainen, Markku JunttiAbstract:The impact of the Terrestrial Network interference to a satellite uplink transmission is studied in this paper. In a system, where an LTE Terrestrial Network is extended by a satellite communication, the Terrestrial interference can become a problem. The interference levels are studied via infield measurements and link budget calculations and the interference tolerance of the satellite receiver are studied via computer simulations. The results show that in spite of the long satellite communication link, strictly power limited system and Terrestrial interference the satellite link can operate on the same frequency band as the Terrestrial Network.
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satellite uplink transmission with Terrestrial Network interference
Global Communications Conference, 2014Co-Authors: Janne Janhunen, Johanna Ketonen, Ari Hulkkonen, Juha Ylitalo, Antti Roivainen, Markku JunttiAbstract:The impact of the Terrestrial Network interference to a satellite uplink transmission is studied in this paper. In a system, where an LTE Terrestrial Network is extended by a satellite communication, the Terrestrial interference can become a problem. The interference levels are studied via infield measurements and link budget calculations and the interference tolerance of the satellite receiver are studied via computer simulations. The results show that in spite of the long satellite communication link, strictly power limited system and Terrestrial interference the satellite link can operate on the same frequency band as the Terrestrial Network.
Min Lin - One of the best experts on this subject based on the ideXlab platform.
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On the Performance of NOMA-Assisted Overlay Multiuser Cognitive Satellite-Terrestrial Networks
IEEE Wireless Communications Letters, 2020Co-Authors: Vibhum Singh, Prabhat K. Upadhyay, Min LinAbstract:In this letter, we investigate the performance of an overlay cognitive satellite-Terrestrial Network comprising a primary satellite source with its multiple Terrestrial receivers and a secondary transmitter-receiver pair on the ground. Herein, the primary satellite source employs a non-orthogonal multiple access (NOMA) scheme to simultaneously serve its all users, while the secondary transmitter assists the primary communication through cooperative relaying technique in exchange for spectrum access. For this overall set-up, we obtain the closed-form expressions for the outage probability of primary satellite Network and secondary Terrestrial Network by adopting pertinent heterogeneous fading models. Further, we derive the asymptotic outage behaviour at high signal-to-noise-ratio (SNR) for the primary and secondary Networks, and thereby calculate the achievable diversity orders. Our analytical findings are corroborated through various numerical and simulation results.
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ICC - Combined Beamforming with NOMA for Cognitive Satellite Terrestrial Networks
ICC 2019 - 2019 IEEE International Conference on Communications (ICC), 2019Co-Authors: Min Lin, Chunyan Yin, Zhi Lin, Jun-bo Wang, Tomaso De Cola, Jian OuyangAbstract:This paper proposes a beamforming (BF) scheme with non-orthogonal multiple access (NOMA) for a cognitive satellite-Terrestrial Network (CSTN), where the satellite Network shares the radio frequency bandwidth with the Terrestrial Network. By assuming that the satellite adopts multicast technology to serve several satellite terminals (STs), while the base station (BS) employs the combination of BF and NOMA to significantly enhance the spectrum efficiency, we aim at maximizing the sumrate of the considered CSTN under the constraints of per-antenna power budget and the quality of service (QoS) requirements for desired cellular users (CUs) and STs. Then, based on the S-procedure and Taylor approximation approach, we present a method to convert the nonconvex problem to a solvable one with linear constraints, and obtain the optimal BF weight vectors through iterative procedure. Finally, numerical results demonstrate the validity and superiority of our proposed scheme.
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Joint CoMP Transmission for UAV-Aided Cognitive Satellite Terrestrial Networks
IEEE Access, 2019Co-Authors: Meng Hua, Min Lin, Yi Wang, Yongming Huang, Luxi YangAbstract:This paper investigates a novel architecture of coordinated multi-point (CoMP) transmission in the cognitive satellite-Terrestrial Network associated with an unmanned aerial vehicle (UAV). We consider the downlink communication where the UAV and base station (BS) cooperatively serve the Terrestrial user by sharing the licensed satellite Network spectrum. The goal of this paper is to maximize the achievable rate of the Terrestrial user by jointly optimizing BS/UAV transmit power allocation and UAV trajectory, subjecting to the interference temperature threshold imposed on satellite Network as well as UAV mobility constraint. The formulated problem is shown in a complicated non-convex form, which is hard to tackle. To this end, we decompose the original problem into two sub-problems, and the block coordinate descent method is employed to solve the two sub-problems alternately. Specifically, for the first sub-problem, the optimal BS/UAV transmit power is obtained with a given UAV trajectory by using the Lagrangian dual method. For the second sub-problem, the UAV trajectory is attained with a given BS/UAV power allocation by using the successive convex approximation technique. Simulation results show that our proposed joint CoMP transmission scheme significantly improves the Terrestrial Network throughput compared with other benchmark schemes.
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joint beamforming for secure communication in cognitive satellite Terrestrial Networks
IEEE Journal on Selected Areas in Communications, 2018Co-Authors: Min Lin, Weiping Zhu, Zhi Lin, Jun-bo WangAbstract:This paper investigates the secure communication of a cognitive satellite Terrestrial Network with software-defined architecture, where a gateway is acting as a control center to offer the resource allocation for the wireless systems. Specifically, we propose beamforming (BF) schemes to utilize the interference from the Terrestrial Network as a green source to enhance the physical-layer security for the satellite Network, provided that the two Networks share the portion of millimeter-wave frequencies. Supposing that the satellite employs multibeam antenna while the base station is equipped with a uniform planar array, we first formulate a constrained joint optimization problem to minimize the total transmit power while satisfying both the quality-of-service requirement of the Terrestrial user and the secrecy rate (SR) requirements of the satellite users. Since the formulated optimization problem is nonconvex and mathematically intractable, we then propose two BF schemes to obtain the optimal solutions with high computational efficiency. For the case of one eavesdropper (Eve), we present a method to convert the nonconvex SR constraint to a second-order cone one and then adopt a penalty function approach to obtain the BF weight vectors. In the case of multiple Eves, by introducing a list of auxiliary variables, we propose a two-layer iterative BF scheme using penalty function approach together with gradient-based method to calculate the BF weight vectors. Finally, simulation results are given to demonstrate the effectiveness and superiority of the proposed BF schemes.
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on the ergodic capacity of multiple antenna cognitive satellite Terrestrial Networks
International Conference on Communications, 2016Co-Authors: Min Lin, Tao Liang, Jian Ouyang, Weiping ZhuAbstract:The integration of cognitive radio (CR) into satellite Networks is recognized as an effective strategy to enhance the efficiency of radio spectrum. This paper investigates the ergodic capacity of a multiple antenna cognitive satellite Terrestrial Network, where the secondary Terrestrial system can coexist with the primary satellite system as long as the interference imposed from the secondary user (SU) to the primary user (PU) is below a predefined threshold. Specifically, the Meijer-G function based analytical expression for the ergodic capacity of the secondary Network is derived, which not only provides an efficient means to evaluate the system performance but also characterize the impact of various channel parameters on the Network. Finally, simulation results are provided to demonstrate the validity of the theoretical analysis.
