Poster (Scientific congresses, symposiums and conference proceedings)
Hybrid Active-Passive Reconfigurable IntelligentSurface-Assisted UAV Communications
Nguyen, Nhan T.; Nguyen, V.-Dinh; Wu, Qingqing et al.
20222022 IEEE Global Communications Conference (GLOBECOM)
 

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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%.
Disciplines :
Computer science
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
External co-authors :
yes
Language :
English
Title :
Hybrid Active-Passive Reconfigurable IntelligentSurface-Assisted UAV Communications
Publication date :
December 2022
Event name :
2022 IEEE Global Communications Conference (GLOBECOM)
Event organizer :
IEEE
Event place :
Rio de Janeiro, Brazil
Event date :
4 to 8 December 2022
Audience :
International
Focus Area :
Computational Sciences
Available on ORBilu :
since 12 December 2022

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