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.


    Access

    Download


    Export, share and cite



    Title :

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


    Contributors:
    Baihua Shi (author) / Yang Wang (author) / Danqi Li (author) / Wenlong Cai (author) / Jinyong Lin (author) / Shuo Zhang (author) / Weiping Shi (author) / Shihao Yan (author) / Feng Shu (author)


    Publication date :

    2023




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    FFR-Aided Coordinated Multipoint Transmission in Downlink Multicell MIMO-OFDMA Networks

    Pastor-Perez, Javier / Riera-Palou, Felip / Femenias, Guillem | IEEE | 2015


    Adaptive Photonics-Aided Coordinated Multipoint Transmissions for Next-Generation Mobile Fronthaul

    Cheng, L. / Zhu, M. / Gul, M.M.U. et al. | British Library Online Contents | 2014


    Robust and Secure Transmission Design in Multi-User STAR-RIS-Aided Communications

    Pala, Sonia / Singh, Keshav / Taghizadeh, Omid et al. | IEEE | 2024


    Resource Allocation for Non-Orthogonal Multiple Access with Coordinated Multipoint Support

    Huang, Zhi-Xuan / Peng, Yen Chun / Lo, Yi-Chia et al. | IEEE | 2020