Unmanned aerial vehicles (UAVs) are set to feature heavily in upcoming fifth generation (5G) networks. Yet, the adoption of multi-UAV networks means that spectrum scarcity in UAV communications is an issue in need of urgent solutions. Towards this end, downlink non-orthogonal multiple access (NOMA) is investigated in this paper for multi-UAV networks to improve spectrum utilization. Using the bivariate Rician shadowed fading model, closed-form expressions for the joint probability density function (PDF), marginal cumulative distribution functions (CDFs), and outage probability expressions are derived. Under a stochastic geometry framework for downlink NOMA at the UAVs, an outage probability analysis of the multi-UAV network is conducted, where it is shown that downlink NOMA attains lower outage probability than orthogonal multiple access (OMA). Furthermore, it is shown that NOMA is less susceptible to shadowing than OMA.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Downlink NOMA in Multi-UAV Networks over Bivariate Rician Shadowed Fading Channels




    Publication date :

    2019-09-01


    Size :

    287101 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Hybrid-Duplex Systems for UAV Communications Under Rician Shadowed Fading

    Ernest, Tan Zheng Hui / Madhukumar, A S / Sirigina, Rajendra Prasad et al. | IEEE | 2018


    Modeling Analysis for Downlink RIS-UAV-Assisted NOMA over Air-to-Ground Line-of-Sight Rician Channels

    Suoping Li / Xiangyu Liu / Jaafar Gaber et al. | DOAJ | 2024

    Free access

    Low-Complexity Joint User and Power Scheduling for Downlink NOMA Over Fading Channels

    Kim, Do-Yup / Jafarkhani, Hamid / Lee, Jang-Won | IEEE | 2021



    Performance Analysis of Physical Layer Security over Rician/Nakagami-m Fading Channels

    Iwata, Shunya / Ohtsuki, Tomoaki / Kam, P.-Y. | IEEE | 2017