It is known that the Non-Orthogonal Multiple Access (NOMA) system is capable of obtaining higher spectral efficiency and massive connectivity owing to the fact that multiple users are superimposed over each resource. However, as the number of users is more than that of resources, the resultant surjective-only mapping and expanded constellation increase the multiuser detection (MUD) complexity at the receiver inherently. In this paper, a downlink code-domain NOMA design based on combinatorial structures with balanced incomplete block design (BIBD) is studied. The unique discretizing distribution of BIBD provides an inherent mapping pattern for the linear combination of multiuser data. To accommodate with our system, a heuristic constellation forming paradigm is proposed. Message Passing Algorithm (MPA) is used at the receiver in this design. Simulation results on additive white Gaussian (AWGN) and Rayleigh fading channel demonstrate that our system obtain an equivalent even better performance compared with other similar code-domain NOMA techniques with much lower design complexity.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A Downlink NOMA System Based on Combinatorial Design


    Contributors:


    Publication date :

    2018-08-01


    Size :

    428030 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Generalized Single-RF Downlink NOMA-SM System

    Al-Ansi, Mohammed / Aljunid, Syed Alwee / Sourour, Essam et al. | IEEE | 2019



    Downlink Non-Orthogonal Multiple Access (NOMA) Constellation Rotation

    Zhang, Jian / Wang, Xin / Hasegawa, Tsuyoshi et al. | IEEE | 2016


    Selective Transmission Strategy for NOMA in Downlink CoMP

    Chung, Char-Dir / Ku, Chia-An | IEEE | 2019


    Energy Efficient mmWave NOMA Downlink Multi-Relay System for ITSN

    He, Yizhi / Jiao, Jian / Chen, Zeqiong et al. | IEEE | 2020