eprintid: 10189914
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/18/99/14
datestamp: 2024-04-04 15:11:47
lastmod: 2024-04-04 15:11:47
status_changed: 2024-04-04 15:11:47
type: proceedings_section
metadata_visibility: show
sword_depositor: 699
creators_name: Sun, Y
creators_name: An, K
creators_name: Lin, Z
creators_name: Zhu, Y
creators_name: Al-Dhahir, N
creators_name: Wong, KK
title: Scalable Robust Beamforming for Multi-Layer Refracting RIS-Assisted HAP-SWIPT Networks
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F46
keywords: Fading channels
,
Wireless communication
,
Transmitters
,
Receivers
,
Reconfigurable intelligent surfaces
,
Optimization
,
Simultaneous wireless information and power transfer
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: To mitigate the severe large-scale fading and the energy scarcity problem in long-distance high-altitude platform (HAP) networks, in this paper, we investigate the potentials of a multi-layer refracting reconfigurable intelligent surface (RIS) -assisted receiver for enabling simultaneous wireless information and power transfer (SWIPT) in HAP networks. Unlike the existing RIS-aided reflector and transmitter, the multi-layer RIS-receiver can well overcome the severe 'double fading' effect induced by the extreme long-distance HAP links and fully exploit RIS's degrees-of-freedom (DoFs) for SWIPT design. Building on the proposed RIS-receiver, this paper formulates a worst-case sum rate maximization problem under angular channel state information (CSI) imperfection, while satisfying the information rate requirements of the earth stations (ESs) and the harvested energy constraint. To handle the intractable non-convex problem, a scalable robust optimization framework utilizing the discretization method, LogSumExp-dual scheme, and modified cyclic coordinate descent (M-CCD) is proposed to obtain the semi-closed-form solutions. Numerical simulations demonstrate that the proposed architecture and optimization framework achieve superior performance with lower complexity compared with state-of-the-art schemes in HAP networks.
date: 2024-02-26
date_type: published
publisher: IEEE
official_url: http://dx.doi.org/10.1109/globecom54140.2023.10437169
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2262291
doi: 10.1109/GLOBECOM54140.2023.10437169
lyricists_name: Wong, Kai-Kit
lyricists_id: KWONG98
actors_name: Wong, Kai-Kit
actors_id: KWONG98
actors_role: owner
full_text_status: public
pres_type: paper
publication: Proceedings - IEEE Global Communications Conference, GLOBECOM
pagerange: 1656-1662
event_title: GLOBECOM 2023 - 2023 IEEE Global Communications Conference
event_dates: 4 Dec 2023 - 8 Dec 2023
book_title: Proceedings - IEEE Global Communications Conference, GLOBECOM
citation:        Sun, Y;    An, K;    Lin, Z;    Zhu, Y;    Al-Dhahir, N;    Wong, KK;      (2024)    Scalable Robust Beamforming for Multi-Layer Refracting RIS-Assisted HAP-SWIPT Networks.                     In:  Proceedings - IEEE Global Communications Conference, GLOBECOM.  (pp. pp. 1656-1662).  IEEE       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10189914/1/a275-sun%20final.pdf