SATCOM: Emerging Technologies Enhancing Efficiency

IEEE access, 2024

European Journal of Advances in Engineering and Technology, 2024

Digital satellite technology has undergone profound evolution, transitioning from analog to advanced digital systems that revolutionize communication, broadcasting, and remote sensing applications. Innovations in signal processing, modulation techniques, and encoding standards have significantly boosted data transmission rates, signal quality, and reliability in satellite communications. This evolution has facilitated the integration of multimedia services like high-definition television (HDTV), internet access, and mobile broadcasting, expanding the scope and efficiency of satellite-based networks globally. In communication, digital satellites serve critical roles in providing voice, data, and multimedia services to remote and underserved areas, supporting telecommunications infrastructure, disaster recovery, and emergency response efforts where terrestrial networks are lacking. Moreover, digital satellite systems play a vital role in broadcasting, delivering television and radio programming to diverse regions, and ensuring widespread access to entertainment, news, and educational content. Beyond communication, digital satellites enhance Earth observation and remote sensing capabilities with advanced imaging sensors and radar systems, facilitating high-resolution imagery for environmental monitoring, agriculture, urban planning, and disaster management. Looking forward, ongoing advancements in artificial intelligence, machine learning, and autonomous operations promise to further elevate the capabilities and efficiency of digital satellite technology, paving the way for enhanced data analytics, predictive modeling, and real-time applications across various sectors globally.

IEEE Communications Surveys & Tutorials, 2021

Satellite communications (SatComs) have recently entered a period of renewed interest motivated by technological advances and nurtured through private investment and ventures. The present survey aims at capturing the state of the art in SatComs, while highlighting the most promising open research topics. Firstly, the main innovation drivers are motivated, such as new constellation types, on-board processing capabilities, non-terrestrial networks and space-based data collection/processing. Secondly, the most promising applications are described, i.e., 5G integration, space communications, Earth observation, aeronautical and maritime tracking and communication. Subsequently, an in-depth literature review is provided across five axes: i) system aspects, ii) air interface, iii) medium access, iv) networking, v) testbeds & prototyping. Finally, a number of future challenges and the respective open research topics are described.

ArXiv, 2021

Non-terrestrial networks (NTNs) traditionally had certain limited applications. However, the recent technological advancements opened up myriad applications of NTNs for 5G and beyond networks, especially when integrated into terrestrial networks (TNs). This article comprehensively surveys the evolution of NTNs highlighting its relevance to 5G networks and essentially, how it will play a pivotal role for the development of 6G and beyond wireless networks. The survey discusses important features of NTNs integration into TNs by delving into the new range of services and use cases, various architectures, and new approaches being adopted to develop new wireless ecosystem. Our survey includes the major progresses and outcomes from academic research as well as industrial efforts. We first start with introducing the relevant 5G use cases and general integration challenges such as handover and deployment difficulties. Then, we review the NTNs operations in mmWave and their potential for inte...

The integration of satellite and terrestrial networks have become inevitable in the next generations of communications networks due to emerging needs of ubiquitous connectivity of remote locations. New and existing services and critical infrastructures in remote locations in sea, land and space will be seamlessly connected through a diverse set of terrestrial and non-terrestrial communication technologies. However, the integration of terrestrial and non-terrestrial systems will open both systems to unique security challenges that can arise due to the migration of security challenges from one to another. Similarly, security challenges can also arise due to the incompatibility of distinct systems or incoherence of security policies. The resulting security implications, thus, can be highly consequential due to the criticality of the infrastructures such as space stations, autonomous ships, and aeroplanes, for instance. Therefore, in this article we study existing security challenges in...

Encyclopedia

This review provides a comprehensive review of past and existing works on 5G systems with a laser focus on 5G Satellite Integration (SATis5) for commercial and defense applications. The holistic survey approach is used to gain an in-depth understanding of 5G-Terrestrial Network (5G-TN), 5G-Non-Terrestrial Network (5G-NTN), SATis5 testbeds, and projects along with related SATis5 architectures. Based on the survey results, the review provides (i) outlook perspectives on potential SATis5 architectures for current and future integrated defense and commercial satellite communication (SATCOM) with 5G systems, and (ii) a thorough understanding of problems associated with anticipated outlooks and corresponding studies addressing these problems. The commercial SATis5 architectures discussed here can be extended to civilian SATCOM applications.

WIT Transactions on The Built Environment

The growth of cellular and satellite telecom systems with the introduction of 5G and broadband mobile satellites are creating a global and pervasive telecom infrastructure offering connectivity services in any place in the world. Furthermore, 5G will provide millisecond latencies and network "slicing" capabilities that are ideal to realize bespoke virtual networks. A new generation of small satellites in low earth orbits are being launched promising a lower cost and a much higher throughput with latency below 100 m/s. The European Railways Train Management System (ERTMS) utilizes, since its conception in the early 1990s, GSM-R as the legacy telecom network linking trains with the Radio Block Center. This technology will have to be substituted as it approaches its end of life and cannot satisfy increasing demand of connectivity for new railway applications. UIC has defined the user needs of the Future Railway Mobile Communication System (FRMCS), one of the ERTMS game changers and the Shift2Rail-X2Rail-1 partners have agreed on adopting the ACS (Adaptable Communication System) as the architecture for the successor of the GSM-R. This paper addresses new railway needs with the goal of sharing cellular and satcom public telecom networks. An open multi-bearer system, coherent with ACS and FRMCS is evaluated as an alternative or complement to a dedicated network. A number of possible scenarios with different line lengths and operating trains demonstrate important cost reductions when bundling cellular and satellite bearers to achieve the QoS. Side benefits such as the possible reduction of new spectrum for the FRMCS applications, less emissions of CO2 and a faster time to operate are evaluated. Yet, the role of new high throughput satcom is underlined to satisfy the increasing demand of train connectivity and also to extend the coverage of the future 5G services in the railways ecosystem.

2014 7th Advanced Satellite Multimedia Systems Conference and the 13th Signal Processing for Space Communications Workshop (ASMS/SPSC), 2014

In this paper we review some of the work of the' Satellite Working Group' in the European Technology platform NETWORLD2020 towards a strategy for satellites in 5G. We first review the 5G vision and its drivers as defined by the terrestrial mobile community via the 5GPPP Association. We then outline the areas in which satellite can contribute to an integrated system within 5G and detail the research challenges that this provides. Finally we give views on a technology roadmap to meet these challenges such that satellites are ready by 2020 to play their part in the integrated 5G roll out.

IEEE Journal on Selected Areas in Communications

Người ta tiến hành chọn người thông minh nhất trong ba học sinh đạt giải ở một cuộc thi học sinh giỏi toán bằng cách sau: