FDD-Based Cell-Free Massive MIMO Systems

Seungnyun Kim, Byonghyo Shim

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

2 Citations (Scopus)

Abstract

Cell-free massive MIMO system is a promising technology of 5G wireless communications that provide a user-centric coverage to the user by the basestation cooperation. Most prior works on the cell-free massive MIMO systems assume the time division duplexing (TDD) systems, although the frequency division duplexing (FDD) systems dominate the current wireless communications. In the FDD systems, CSI acquisition and feedback overhead are serious concerns when the number of antennas is large. To address these problems, we use the property that the uplink and downlink multipath components are similar, so-called angle reciprocity. By exploiting the angle reciprocity, basestation can directly acquire multipath component information from the uplink pilot signal. In this paper, we propose multipath component estimation technique and basestation cooperation scheme based on the multipath components for the FDD-based cell-free massive MIMO systems. Simulation results show that the proposed multipath component estimation technique outperforms the conventional subspace-based technique. Also, we show that the FDD-based cell-free massive MIMO systems substantially improve energy efficiency over the cellular systems.

Original languageEnglish
Title of host publication2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Volume2018-June
ISBN (Print)9781538635124
DOIs
Publication statusPublished - 2018 Aug 24
Externally publishedYes
Event19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 - Kalamata, Greece
Duration: 2018 Jun 252018 Jun 28

Other

Other19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
CountryGreece
CityKalamata
Period18/6/2518/6/28

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

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  • Cite this

    Kim, S., & Shim, B. (2018). FDD-Based Cell-Free Massive MIMO Systems. In 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 (Vol. 2018-June). [8446023] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SPAWC.2018.8446023