Pilot Allocation and Interference Coordination for Heterogeneous Network with Massive MIMO/TDD

Osamu Muta, Wanming Hao, Haris Gacanin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we present our recent studies on pilot allocation and interference coordination for heterogeneous networks (HetNets) using massive multi-input-multi-output (mMIMO) technology in time division duplex (TDD) mode, where the macro-cell base station (MBS) and overlaid small-cell base stations (SBSs) share the same time-frequency resources, and thus co-tier and cross-tier interferences occur. We investigate how to coordinate such undesirable interference for maximizing the system sum-rate under required constraints. As the first approach, we present an uplink pilot allocation scheme to enhance the downlink system sum-rate by coordinating downlink cross-tier interference to small-cell users (SUs) based on the estimated uplink channel state information. In this approach, we study the optimum pilot allocation against the trade-off between two degradation factors, i.e., uplink pilot overhead and downlink cross-tier interference. As the second approach, we present a dynamic SBS clustering scheme to mitigate dominant co-tier interference among small cells (SCs), where the SBS clustering is carried out based on potential mutual co-tier interference strength between two SCs. We also consider the SBS precoder design in each cluster to further improve the downlink sum rate of SCs under SBS power constraint. Simulation results show that our proposals are useful approaches to enhance the sum rate performance in TDD-mMIMO-HetNets.

Original languageEnglish
Title of host publicationISPACS 2018 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages295-300
Number of pages6
ISBN (Electronic)9781538657713
DOIs
Publication statusPublished - Nov 2018
Event2018 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2018 - Ishigaki Island, Okinawa, Japan
Duration: Nov 27 2018Nov 30 2018

Publication series

NameISPACS 2018 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems

Conference

Conference2018 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2018
CountryJapan
CityIshigaki Island, Okinawa
Period11/27/1811/30/18

All Science Journal Classification (ASJC) codes

  • Artificial Intelligence
  • Computer Networks and Communications
  • Computer Science Applications
  • Signal Processing

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  • Cite this

    Muta, O., Hao, W., & Gacanin, H. (2018). Pilot Allocation and Interference Coordination for Heterogeneous Network with Massive MIMO/TDD. In ISPACS 2018 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems (pp. 295-300). [8923182] (ISPACS 2018 - 2018 International Symposium on Intelligent Signal Processing and Communication Systems). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISPACS.2018.8923182