Article (Scientific journals)
1 Energy-Efficient Hybrid Beamforming for Multi-Layer RIS-Assisted Secure Integrated Terrestrial-Aerial Network
Sun, Yifu; An, Kang; Zhu, Yonggang et al.
2022In IEEE Transactions on Communications, 70 (6), p. 4189 - 4210
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Abstract :
[en] The integration of aerial platforms to provide ubiq- uitous coverage and connectivity for densely deployed terrestrial networks is expected to be a reality in emerging sixth-generation networks. Energy-effificient design and secure transmission are two crucial issues for integrated terrestrial-aerial networks. With this focus, due to the potential of RIS in substantially saving power consumption and boosting the security of private information by enabling a smart radio environment, this paper investigates the energy-efficient hybrid beamforming for multi- layer reconfigurable intelligent surface (RIS)-assisted secure in- tegrated terrestrial-aerial network for defending against simul- taneous jamming and eavesdropping attacks. Specifically, with the available of angular information based imperfect channel state information (CSI), we propose a framework for the joint optimization of user’s received precoder, terrestrial BS’s and HAP’s digital precoder, and multi-layer RIS analog precoder to maximize the system energy efficiency (EE) performance. For the design of received precoder, a heuristic beamforming scheme is proposed to convert the worst-case problem into a min-max one such that a closed-form solution is derived. For the design of digital precoder, we propose an iterative sequential convex approximation approach via capitalizing the auxiliary variables and first-order Taylor series expansion. Finally, a monotonic vertex-update algorithm with penalty convex concave procedure is proposed to obtain analog precoder with low computational complexity. Numerical results show the superiority and effective- ness of proposed optimization framework and architecture
Disciplines :
Computer science
Author, co-author :
Sun, Yifu
An, Kang
Zhu, Yonggang
Zheng, Gan
Wong, Kai-Kit
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Guan, Dongfang
Wing Kwan Ng, Derrick
External co-authors :
Language :
Title :
1 Energy-Efficient Hybrid Beamforming for Multi-Layer RIS-Assisted Secure Integrated Terrestrial-Aerial Network
Publication date :
22 June 2022
Journal title :
IEEE Transactions on Communications
Publisher :
Institute of Electrical and Electronics Engineers, United States
Volume :
Issue :
Pages :
4189 - 4210
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Computational Sciences
Funders :
10.13039/501100001809-National Natural Science Foundation of China (Grant Number: 61901502, 62131005 and 62071352)
R-STR-5010-00-Z SIGCOM RG of Interdisciplinary Centre for Security, Reliability and Trust, University of Luxembourg
10.13039/501100012152-National Postdoctoral Program for Innovative Talents (Grant Number: BX20200101)
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