AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems

Seungnyun Kim; Byonghyo Shim

doi:10.1109/VTCFall.2018.8690646

AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems

Seungnyun Kim, Byonghyo Shim

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Citations (Scopus)

Abstract

Cell-free massive MIMO system is one of a promising technology of 5G wireless communications that can provide high throughput from the basestation cooperation. To capitalize on the gain obtained by the basestation cooperation, the downlink channel state information (CSI) should be available at the basestations. In the popularly used frequency division duplexing (FDD) system, the downlink CSI must be fed back from the users. However, due to a large number of antennas and basestations, the feedback overhead is a serious concern in the cell-free systems. Recent studies have shown that the uplink and downlink channels have similar angle-of-departures (AoDs), so-called angle reciprocity. In this paper, we present an AoD-based statistical beamforming scheme for the cell-free massive MIMO systems that does not rely on the CSI feedback. Also, we provide an efficient solution for the power allocation problem that minimizes the total power consumption of the basestations. Simulation results demonstrate that the proposed scheme saves approximately 12% transmit power and has a 22% higher coverage probability compare to the conventional cellular systems.

Original language	English
Title of host publication	2018 IEEE 88th Vehicular Technology Conference, VTC-Fall 2018 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538663585
DOIs	https://doi.org/10.1109/VTCFall.2018.8690646
Publication status	Published - 2018 Jul 2
Event	88th IEEE Vehicular Technology Conference, VTC-Fall 2018 - Chicago, United States Duration: 2018 Aug 27 → 2018 Aug 30

Publication series

Name	IEEE Vehicular Technology Conference
Volume	2018-August
ISSN (Print)	1550-2252

Conference

Conference	88th IEEE Vehicular Technology Conference, VTC-Fall 2018
Country/Territory	United States
City	Chicago
Period	18/8/27 → 18/8/30

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

Access to Document

10.1109/VTCFall.2018.8690646

Cite this

AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems. / Kim, Seungnyun; Shim, Byonghyo.
2018 IEEE 88th Vehicular Technology Conference, VTC-Fall 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. 8690646 (IEEE Vehicular Technology Conference; Vol. 2018-August).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kim, S & Shim, B 2018, AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems. in 2018 IEEE 88th Vehicular Technology Conference, VTC-Fall 2018 - Proceedings., 8690646, IEEE Vehicular Technology Conference, vol. 2018-August, Institute of Electrical and Electronics Engineers Inc., 88th IEEE Vehicular Technology Conference, VTC-Fall 2018, Chicago, United States, 18/8/27. https://doi.org/10.1109/VTCFall.2018.8690646

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AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems

Abstract

Publication series

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Bibliographical note

ASJC Scopus subject areas

Access to Document

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