Hybrid Active-Passive Reconfigurable IntelligentSurface-Assisted UAV Communications

Nguyen, Nhan T.; Nguyen, V.-Dinh; Wu, Qingqing; Tölli, Antti; Chatzinotas, Symeon; Juntti, Markku

Reference : Hybrid Active-Passive Reconfigurable IntelligentSurface-Assisted UAV Communications


	Document type :	Scientific congresses, symposiums and conference proceedings : Poster
	Discipline(s) :	Engineering, computing & technology : Computer science
	Focus Areas :	Computational Sciences
	To cite this reference:	http://hdl.handle.net/10993/53043

Title :	Hybrid Active-Passive Reconfigurable IntelligentSurface-Assisted UAV Communications
Language :	English
Author, co-author :	Nguyen, Nhan T. []
	Nguyen, V.-Dinh []
	Wu, Qingqing []
	Tölli, Antti []
	Chatzinotas, Symeon [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom >]
	Juntti, Markku []
Publication date :	Dec-2022
Peer reviewed :	Yes
Audience :	International
Event name :	2022 IEEE Global Communications Conference (GLOBECOM)
Event date :	4 to 8 December 2022
Event organizer :	IEEE
Event place (city) :	Rio de Janeiro
Event country :	Brazil
Abstract :	[en] We consider a novel hybrid active-passive reconfigurable intelligent surface (RIS)-assisted unmanned aerial vehicle (UAV) air-ground communications system. Unlike the conventional passive RIS, the hybrid RIS is equipped with a few active elements to not only reflect but also amplify the incident signals for significant performance improvement. Towards a fairness design, our goal is to maximize the minimum rate among users through jointly optimizing the location and power allocation of the UAV and the RIS reflecting/amplifying coefficients. The formulated optimization problem is nonconvex and challenging, which is efficiently solved via block coordinate descend and successive convex approximation. Our numerical results show that a hybrid RIS requires only 4 active elements and a power budget of 0 dBm to achieve an improvement of 52.08% in the minimum rate, while that achieved by a conventional passive RIS with the same total number of elements is only 18.06%.
Permalink :	http://hdl.handle.net/10993/53043
Other URL :	https://arxiv.org/pdf/2203.07042.pdf

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