Showing papers in "International Journal of Satellite Communications and Networking in 2020"
TL;DR: In this article, the performance signature of modulation techniques based on low earth orbit (LEO)/medium Earth orbit (MEO) intersatellite optical wireless communication has been investigated.
Abstract: Summary This paper has deeply investigated the performance signature of modulation techniques based low earth orbit (LEO)/medium earth orbit (MEO) intersatellite optical wireless communication syst...
81 citations
TL;DR: The possible satellite's role and technical solutions required for providing broadband services complementing the terrestrial fifth generation wireless standards and the space and ground segment technologies enabling the successful satellite contribution to broadband services provision are investigated.
42 citations
TL;DR: This framework addresses the problem of the user selection for multicast precoding by formulating it as a clustering problem by introducing a novel mathematical framework that design fixed/variable size clustering algorithms that group users into simultaneously precoded and served clusters while maximising the system throughput.
34 citations
TL;DR: An improved protocol based on perfect forward secrecy is presented that gets possession of faultless security properties and overcomes the flaws in the protocol of Qi et al perfectly and can be appropriated for the mobile communications.
Abstract: Summary As the mobile network progresses fast, mobile communications have a far‐reaching influence in our daily life. In order to guarantee the communication security, a myriad of experts introduce...
25 citations
TL;DR: In view of the problems of low routing efficiency, complex control process, and difficult network management in big data environment in the traditional integrated space-terrestrial network, this paper proposed a solution to solve the problem.
Abstract: Summary In view of the problems of low routing efficiency, complex control process, and difficult network management in big data environment in the traditional integrated space‐terrestrial network,...
21 citations
TL;DR: This paper analyzes the performance of edge caching 5G networks with the aid of satellite communication systems and studies the effectiveness of satellite systems via the proposed satellite‐aided caching algorithm.
Abstract: Summary The fifth‐generation (5G) wireless networks have to deal with the high data rate and stringent latency requirements due to the massive invasion of connected devices and data‐hungry applicat...
14 citations
TL;DR: A novel dynamic hierarchical and distributed QoS (quality of service) routing protocol (HDRP) is investigated, and an adaptive bandwidth‐constrained minimum‐delay path for IGSO/GEO/MEO hierarchical architecture constellation (BMDP‐HAC) algorithm is developed to calculate routing tables efficiently using the QoS metric information composed of delays and bandwidth.
Abstract: Summary In this paper, a three‐layered medium Earth orbit (MEO), geostationary Earth orbit (GEO), and inclined geosynchronous orbit (IGSO) satellite network (IGMSN) is presented. Based on the idea ...
10 citations
TL;DR: Simulation results show that the proposed DRL‐DPA algorithm can improve the system performance in terms of system throughput and power consumption in multibeam satellite systems.
Abstract: Summary Dynamic power allocation (DPA) is the key technique to improve the system throughput by matching the offered capacity with that required among distributed beams in multibeam satellite syste...
9 citations
TL;DR: This work was done during a stay at the SnT, University of Luxembourg, supported by the project SatNEx-IV, co-funded by the European Space Agency (ESA).
Abstract: Funding information This work was funded by the Xunta de Galicia under a predoctoral scholarship (co-funded by the European Social Fund) and it was partially funded by the Agencia Estatal de Investigación (Spain) and the European Regional Development Fund (ERDF) under project MYRADA (TEC2016-75103-C2-2-R). Part of the research was done during a stay at the SnT, University of Luxembourg, supported by the project SatNEx-IV, co-funded by the European Space Agency (ESA). The view expressed herein can in no way be taken to reflect the official opinion of ESA.
8 citations
8 citations
TL;DR: This paper introduces a new propagation experiment which will extend the characterization of the Earth-space channel up to the W band and low Earth orbits (LEO).
Abstract: Due to the congestion of the spectrum and the need for wider bandwidths, ultra-high throughput satellites (UHTS) are moving towards the use of higher frequency bands (Q/V and W band). These frequencies are however severely impaired by atmospheric phenomena causing attenuation, scintillation and depolarization and compromising the quality of service (QoS). In order to study the Earth-space link, several experimental campaigns have been performed up to the Q band with geostationary (GEO) satellites. This paper introduces a new propagation experiment which will extend the characterization of the Earth-space channel up to the W band and low Earth orbits (LEO).
TL;DR: Numerical results are given to demonstrate the superiority of the proposed BF scheme against zero forcing (ZF) and maximal ratio transmission (MRT) schemes and the validity of the secrecy performance analysis.
Abstract: Summary This paper investigates secure transmission of an integrated satellite‐aerial‐terrestrial network (ISATN), where multiple eavesdroppers (Eves) attempt to overhear the satellite signals coop...
TL;DR: This paper presents the design, testing, and validation of a ultra‐wideband (UWB) wireless solution to replace wired intra‐spacecraft communications with wireless communications and indicates the suitability of the proposed solution in terms of delay and data integrity for implementing intra-spacecraft wireless communications.
Abstract: Summary This paper presents the design, testing, and validation of a ultra‐wideband (UWB) wireless solution to replace wired intra‐spacecraft communications with wireless communications. The system...
TL;DR: In this article, the terminal location method in 5G-low Earth Orbit (5G-LEO) satellite communication systems is investigated to overcome the dependence on the external Global Navigation Satellite System.
Abstract: Summary We investigate the terminal location method in 5G‐Low Earth Orbit (5G‐LEO) satellite communication systems. To overcome the dependence on the external Global Navigation Satellite System (GN...
TL;DR: The system architecture of an integrated approach for a data relay satellite system and the development of LEO satellite and ground station modems is described, which allows serving several small and inexpensive LEO satellites at the same time both with low rate telemetry/telecommand links and with high rate download of sensor data.
Abstract: Summary From a geostationary Earth orbit (GEO) satellite's perspective, a low Earth orbit (LEO) satellite is visible on more than half of its orbit. Albeit the free‐space loss of an inter‐satellite...
TL;DR: The key idea of the proposed AG‐DPA is to model the DPA problem into an assignment game model where the competitive equilibrium is achieved and an adaptive price factor is introduced to make a trade‐off between algorithm performance and complexity.
TL;DR: The impact of the PN in time‐slotted RA techniques and the impact of CPE errors on RA performance for a wide range of baud rates and typical STs phase noise masks are investigated.
TL;DR: The contribution of the VCM system to the satellite data link optimization is studied from the perspective of engineering application, which can provide reference for the data link design of remote sensing satellites.
Abstract: Summary In order to make full use of the link resources for data transmission from near‐earth remote sensing satellites, variable coding modulation (VCM) system is used to fully utilize the system ...
TL;DR: A high‐sensitivity noncoherent receiver for the reception of automatic dependent surveillance‐broadcast signals in a satellite‐based application and the sensitivity of the proposed receiver is approximately −98 dBm, corresponding to the probability of correct reception equal to 0.93, is found.
Abstract: Summary In this paper, we design a high‐sensitivity noncoherent receiver for the reception of automatic dependent surveillance‐broadcast (ADS‐B) signals in a satellite‐based application. The propos...
TL;DR: This paper introduces a concurrent approach to the development and verification of baseband systems for satellite ground operations based on the behaviour‐driven development methodology and uses the open‐source GNU Radio development kit for developing the software‐defined radio baseband signal processing.
Abstract: Communication systems are adopting all‐software architectures, because of their scalability, extensibility, flexibility, and cost‐effectiveness. This paper introduces a concurrent approach to the d ...
TL;DR: A statistical analysis of various web browsers' traffic and techniques to reduce the number of transport layer flows originating from client side are presented and technical suggestions are presented to achieve better quality of experience for the users of Internet‐at‐sea.
Abstract: Summary To support on‐board satellite Internet connectivity at sea, the shipping vessels rely on various types of WAN accelerator devices. These devices provide bandwidth optimization over high‐lat...
TL;DR: Through simulations, it is shown that the proposed full‐duplex RA‐DSS achieves better data rate than the DSS, single satellite system, and orthogonal transmission even if the users are closely placed.
Abstract: Summary Full frequency reuse based dual satellite system (DSS) is investigated in this work. In the case of DSS, user terminals receive inter spot beam and intra spot beam interfering signals due t...
TL;DR: In two scenarios, the results show that a residual bit error rate of 10−4 (assuming equally distributed errors) gives end‐to‐end physical layer performance compliant with the DVB‐S2 standard, much higher than typical values in practical systems.
Abstract: Summary We investigate the physical layer performance of a DVB‐S2 system with a digital optical feeder link. We consider three scenarios depending on how the DVB‐S2 modulator functionalities are di...
TL;DR: This paper focuses on developing a novel AIS satellite receiver that uses fast independent component analysis (FastICA) blind source separation technique to resolve the overlapped signals at the satellite and proposes an architecture to realize FastICA algorithm on hardware.
Abstract: Summary The space‐based automatic identification system (S‐AIS) is a maritime safety and vessel monitoring system used to broadcast the ship position and other telemetry every few seconds in short ...
TL;DR: It is proved that the enhanced MAC protocol shows a better performance in DRS systems by derived a contention window adaption by using an iteration algorithm that can dynamically adjust the values of the contention window depending on the number of user satellites in the communication coverage.
Abstract: Summary Data relay satellite (DRS) systems play an important role in space information networks. Characterized by highly dynamic topology and discontinuous communication links, it is suggested that...
TL;DR: A multimode grooming method is proposed and an improved ant colony algorithm (ACO) is designed to obtain the optimum solutions for intracluster traffic grooming and a grooming circle (GC) construction algorithm based on bidirectional graph node partition is developed.
Abstract: Summary Distributed satellite cluster (DSC), which is usually used to construct backbone networks for space information networks, can be viewed as a single satellite carrying more payload with stro...
TL;DR: In this paper, a heterogeneous satellite network that includes low earth orbit (LEO) satellite constellation and terrestrial equipment is proposed to provide low delay services and interference management based on transmission power control between LEO satellite systems and mobile users is very important for obtaining high throughput.
Abstract: Summary With the advent of the fifth generation of mobile radio communication by 2020, there will be many challenges such as increasing service demand with low delay in providing billions of end us...