In this paper, we investigate pilot allocation problem in two-tier time division duplex (TDD) heterogeneous network (HetNet) with mMIMO. First, we propose a new pilot allocation scheme to maximize ergodic downlink sum rate of macro users (MUs) and small cell users (SUs), where the uplink pilot overhead and cross-tier interference are jointly considered. Then, we theoretically analyze the formulated problem and propose a low complexity one-dimensional search algorithm to obtain the optimum pilot allocation. In addition, we propose two suboptimal pilot allocation algorithms to simplify the computational process and improve SUs' fairness, respectively. Finally, simulation results show that the performance of the proposed scheme outperforms that of the traditional schemes.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Pilot Allocation for Interference Coordination In Two-Tier Massive MIMO Heterogeneous Network


    Contributors:


    Publication date :

    2018-06-01


    Size :

    331061 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Pilot Allocation for Multi-Cell TDD Massive MIMO Systems

    Hao, Wanming / Muta, Osamu / Gacanin, Haris et al. | IEEE | 2017


    Two-Dimensional Pilot Allocation for Massive MIMO/TDD Systems

    Muta, Osamu / Matsuzaki, Kouki / Gacanin, Haris | IEEE | 2019


    Uplink Pilot Allocation in Massive MIMO over Gauss-Markov Fading Channels

    Yang, Fuqian / Zong, Jun / Luo, Xiliang | IEEE | 2019


    Pilot Allocation and Sum-Rate Analysis in Distributed Massive MIMO Systems

    Sabbagh, Ramiz / Zhu, Huiling / Wang, Jiangzhou | IEEE | 2017