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Dual loop feedback pre-distortion in satellite communication

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Journal of Systems Engineering and Electronics 2013年第4期24卷 586-591页

作者： Chengkai Tang Baowang Lian Yi Zhang School of Electronics and Information Northwestern Polytechnical University

Since the satellite communication goes in the trend of high-frequency and fast speed, the coefficients updating and the precision of the traditional pre-distortion feedback methods need to be further improved. On this basis, this paper proposes dual loop feedback pre-distortion, which uses two first-order Volterra filter models to reduce the computing complexity and a dynamic error adjustment model to construct a revised feedback to ensure a better pre-distortion performance. The computation complexity, iterative convergence speed and precision of the proposed method are theoretically analyzed. Simulation results show that this dual loop feedback pre-distortion can speed the updating of coefficients and ensure the linearity of the amplifier output.

关键词： satellite communication pre-distortion Volterra filter dual loop feedback mean square error.

Applications and prospects of artificial intelligence in covert satellite communication: a review

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Science China(Information Sciences) 2023年第2期66卷 47-77页

作者： Kun LU Heng LIU Liang ZENG Jiayu WANG Zhongshan ZHANG Jianping AN School of Information and Electronics Beijing Institute of Technology School of Cyberspace Science and Technology Beijing Institute of Technology

satellite communication has the characteristics of wide coverage and large communication capacity, and is not easily affected by land disasters. It is quite suitable as a supplement to terrestrial communication networks and has been widely used in education, navigation, emergency relief, military, etc. However,due to the openness of the channel of satellite communication systems, satellite communication signals are easily eavesdropped on by eavesdroppers. This greatly threatens the privacy and security of countries and individuals. Covert satellite communication can effectively improve the covertness of satellite communication systems and greatly reduce the probability of detection by eavesdroppers. So, it has attracted more and more attention. In addition, with the development of artificial intelligence(AI), AI has been applied in many technics of covert satellite communication, which has achieved higher reliability and stronger concealment in covert satellite communication systems. The research status of key technics in covert satellite communication is discussed in this study, and the applications of AI in covert satellite communication are shown. Finally,future research directions of covert satellite communication are looked forward to. In the future, covert satellite communication technology will be an indispensable part of satellite communication systems.

关键词： satellite communication covert communication secure communication low probability of detection (LPD) artificial intelligence (AI) machine learning (ML)

System Integration of Terrestrial Mobile communication and satellite communication——The Trends, Challenges and Key Technologies in B5G and 6G

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China communications 2020年第12期17卷 156-171页

作者： Shanzhi Chen Shaohui Sun Shaoli Kang State Key Laboratory of Wireless Mobile communications China Academy of Telecommunication TechnologyBeijing 100191China

Mobile communication standards have been developed into a new era of B5G and *** recent years,low earth orbit(LEO)satellites and space Internet have become hot *** integrated satellite and terrestrial systems have been widely discussed by industries and academics,and even are expected to be applied in those huge constellations in *** paper points out the trends of two stages towards system integration of the terrestrial mobile communication and the satellite communications:to be compatible with 5G,and to be integrated within *** on analysis of the challenges of both stages,key technologies are thereafter analyzed in detail,covering both air interface currently discussed in 3GPP for B5G and also novel network architecture and related transmission technologies toward future 6G.

关键词： satellite communication terrestrial mobile communication system integration B5G 6G space internet

Coded Multicasting for Content Delivery over Predictable Time-Varying satellite communication Networks

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China communications 2023年第6期20卷 339-367页

作者： Fan Xu Shuo Shao Meixia Tao Qin Huang Qifa Yan Xiaohu Tang Peng Cheng Laboratory ShenzhenGuangdong 518000China Department of Electronic Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Electronics and Information Engineering BeiHang UniversityBeijing 100191China School of Information Science and Technology Southwest Jiaotong UniversityChengduSichuan 611756China

With the development of astronautic technology, communication satellites now have a tremendous gain in both quantity and quality, and have already shown their capability on multi-functional converged communication other than telecommunication. Under this circumstance, increasing the transmission efficiency of satellite communication network becomes a top priority. In this paper, we focus on content delivery service on satellite networks, where each ground station may have prefetched some file fragments. We cast this problem into a coded caching framework so as to exploit the coded multicast gain for minimizing the satellite communication load. We first propose an optimization-based coded multicast scheme by considering the special property that the satellite network topology is predictable and timevariant. Then, a greedy based fast algorithm is proposed, which can tremendously reduce the computation complexity with a small loss in optimality. Simulation experiments conducted on two Walker constellation satellite networks show that our proposed coded multicast method can efficiently reduce the communication load of satellite networks.

关键词： satellite communication content delivery coded multicast greedy algorithm

Edge Intelligence Assisted Resource Management for satellite communication

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China communications 2022年第8期19卷 31-40页

作者： Yaohua Sun Mugen Peng State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

satellite communication has been seen as a vital part of the sixth generation communication,which greatly extends network *** satellite communication,resource management is a key problem attracting many research ***,previous study mainly focuses on throughput improvement via power allocation and spectrum assignment and the proposed approaches are mostly model-based and dedicated to specific problem ***,with the trend of edge intelligence,complex resource management problems can be efficiently resolved in a model-free *** this paper,a joint beam activation,user-beam association and time resource allocation approach is *** core idea is using stochastic learning at the ground station to identify active user-link beams to meet user rate *** addition,the convergence,optimality and complexity of our proposal are rigorously *** simulation,it is shown that the rate goal of most of the users can be met and meanwhile satellite energy is saved owing to much less active beams.

关键词： satellite communication resource management stochastic learning

Artificial intelligence for satellite communication: A review

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Intelligent and Converged Networks 2021年第3期2卷 213-243页

作者： Fares Fourati Mohamed-Slim Alouini Electrical and Mathematical Sciences and Engineering Division King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia

satellite communication offers the prospect of service continuity over uncovered and under-covered areas,service ubiquity,and service ***,several challenges must first be addressed to realize these benefits,as the resource management,network control,network security,spectrum management,and energy usage of satellite networks are more challenging than that of terrestrial ***,artificial intelligence(AI),including machine learning,deep learning,and reinforcement learning,has been steadily growing as a research field and has shown successful results in diverse applications,including wireless *** particular,the application of AI to a wide variety of satellite communication aspects has demonstrated excellent potential,including beam-hopping,anti-jamming,network traffic forecasting,channel modeling,telemetry mining,ionospheric scintillation detecting,interference managing,remote sensing,behavior modeling,space-air-ground integrating,and energy *** work thus provides a general overview of AI,its diverse sub-fields,and its state-of-the-art *** challenges facing diverse aspects of satellite communication systems are then discussed,and their proposed and potential AI-based solutions are ***,an outlook of field is drawn,and future steps are suggested.

关键词： satellite communication wireless communication artificial intelligence machine learning deep learning reinforcement learning

A Review of Wideband Wide-Angle Scanning 2-D Phased Array and Its Applications in satellite communication

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Journal of communications and Information Networks 2018年第1期3卷 21-30页

作者： Yan Li Shaoqiu Xiao Jiajia Guo School of Physical Electronics University of Electronic Science and Technology of ChinaChengdu 610054China

In this review,research progress on the wideband wide-angle scanning two-dimensional phased arrays is *** importance of the wideband and the wide-angle scanning characteristics for satellite communication is *** like grating lobe avoidance,active reflection coefficient suppression and gain fluctuation reduction are emphasized in this ***,techniques to address these issues and methods to realize the wideband wide-angle scanning phased array are reviewed.

关键词： wideband wide-angle scanning twodimensional phased array satellite communication

Performance Analysis of an Enhanced PRMA-HS Protocol for LEO satellite communication

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Journal of Electronic Science and Technology of China 2005年第4期3卷 298-303页

作者：卓永宁严少虎吴诗其 School of communication and Information Engineering University of Electronic Science and Technology of China Chengdu 610054 China

The packet reservation multiple access with hindering state （PRMA-HS） is a protocol suitable for LEO satellite mobile communication. Although working well with light system payload （amount of user terminals）, the protocol imposes high channel congestion on system with heavy payload, thus degrades the system＇s quality of service. To controlling the channel congestion, a scheme of enhanced PRMA-HS protocol is proposed, which aims to reduce the collision of voice packets by adopting a mechanism of access control. Through theoretic analysis, the system＇s mathematic model is presented and the packet drop probability of the scheme is deduced. To testify the performance of the scheme, a simulation is performed and the results support our analysis.

关键词： packet reservation congestion control satellite communication

A MICROSTRIP ANTENNAELEMENT FOR satellite communication

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A MICROSTRIP ANTENNAELEMENT FOR SATELLITE COMMUNICATION