In this paper, we study the joint user and power scheduling for downlink NOMA over fading channels. Specifically, we focus on a stochastic optimization problem to maximize the weighted average sum rate while ensuring given minimum average data rates of users. To address this problem, we first develop an opportunistic user and power scheduling algorithm (OUPS) based on the duality and stochastic optimization theories. By OUPS, the stochastic problem is transformed into a series of deterministic ones for the instantaneous weighted sum rate maximization for each slot. Thus, we additionally develop a heuristic algorithm with very low computational complexity, called user selection and power allocation algorithm (USPA), for the instantaneous weighted sum rate maximization problem. Via simulation results, we demonstrate that USPA provides near-optimal performance with very low computational complexity, and OUPS well guarantees given minimum average data rates.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

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


    Contributors:


    Publication date :

    2021-04-01


    Size :

    2282624 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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

    Tan, Zheng Hui Ernest / Madhukumar, A. S. / Sirigina, Rajendra Prasad et al. | IEEE | 2019




    Performance Analysis of NOMA-Based Cooperative Relay Systems over Hoyt Fading Channels

    Panic, Stefan R. / Jayakody, Dushanta Nalin K. | IEEE | 2019


    Outage Performance of Active RIS in NOMA Networks over Nakagami-m Fading Channels

    Song, Meiqi / Yue, Xinwei / Ouyang, Chongjun et al. | IEEE | 2023