STAR-RIS-UAV-Aided Coordinated Multipoint Cellular System for Multi-User Networks

Different from conventional reconfigurable intelligent surfaces (RIS), simultaneous transmitting and reflecting RIS (STAR-RIS) can reflect and transmit signals to the receiver. In this paper, to serve more ground users and increase deployment flexibility, we investigate an unmanned aerial vehicle (U...

Full description

Saved in:
Bibliographic Details
Published in:Drones (Basel) 2023-06, Vol.7 (6), p.403
Main Authors: Shi, Baihua, Wang, Yang, Li, Danqi, Cai, Wenlong, Lin, Jinyong, Zhang, Shuo, Shi, Weiping, Yan , Shihao, Shu, Feng
Format: Article
Language:English
Subjects:
Algorithms
Beamforming
Cellular communication
Design optimization
Drone aircraft
Energy consumption
iteration optimization
Methods
Performance evaluation
Protocol
reconfigurable intelligent surface
simultaneous transmitting and reflecting
Unmanned aerial vehicles
Wireless communications
Wireless networks
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Different from conventional reconfigurable intelligent surfaces (RIS), simultaneous transmitting and reflecting RIS (STAR-RIS) can reflect and transmit signals to the receiver. In this paper, to serve more ground users and increase deployment flexibility, we investigate an unmanned aerial vehicle (UAV) equipped with STAR-RIS (STAR-RIS-UAV)-aided wireless communications for multi-user networks. Energy splitting (ES) and mode switching (MS) protocols are considered to control the reflection and transmission coefficients of STAR-RIS elements. To maximize the sum rate of the STAR-RIS-UAV-aided coordinated multipoint (CoMP) cellular system for multi-user networks, the corresponding beamforming vectors as well as transmitted and reflected coefficient matrices are optimized. Specifically, instead of adopting the alternating optimization, we design an iteration method to optimize all variables for both the ES and MS protocols at the same time. Simulation results reveal that the STAR-RIS-UAV-aided CoMP system has a much higher sum rate than systems with conventional RIS or without RIS. Furthermore, the proposed structure is more flexible than fixed STAR-RIS and could greatly promote the sum rate.
ISSN:2504-446X
2504-446X
DOI:10.3390/drones7060403