Reference : 1 Energy-Efficient Hybrid Beamforming for Multi-Layer RIS-Assisted Secure Integrated ...

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Computer science
	Focus Areas :	Computational Sciences
	To cite this reference:	http://hdl.handle.net/10993/53241

Title :	1 Energy-Efficient Hybrid Beamforming for Multi-Layer RIS-Assisted Secure Integrated Terrestrial-Aerial Network
Language :	English
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 []
Publication date :	22-Jun-2022
Journal title :	IEEE Transactions on Communications
Publisher :	Institute of Electrical and Electronics Engineers
Volume :	70
Issue/season :	6
Pages :	4189 - 4210
Peer reviewed :	Yes
Audience :	International
ISSN :	0090-6778
e-ISSN :	1558-0857
Country :	United States
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
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)
Permalink :	http://hdl.handle.net/10993/53241
DOI :	10.1109/TCOMM.2022.3170632
Other URL :	https://ieeexplore.ieee.org/document/9763499

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