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

Seungnyun Kim, Byonghyo Shim

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

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 languageEnglish
Title of host publication2018 IEEE 88th Vehicular Technology Conference, VTC-Fall 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538663585
DOIs
Publication statusPublished - 2019 Apr 12
Event88th IEEE Vehicular Technology Conference, VTC-Fall 2018 - Chicago, United States
Duration: 2018 Aug 272018 Aug 30

Publication series

NameIEEE Vehicular Technology Conference
Volume2018-August
ISSN (Print)1550-2252

Conference

Conference88th IEEE Vehicular Technology Conference, VTC-Fall 2018
CountryUnited States
CityChicago
Period18/8/2718/8/30

Fingerprint

MIMO Systems
Channel state information
Channel State Information
Beamforming
MIMO systems
Cell
Feedback
Angle
Cellular Systems
Coverage Probability
Power Allocation
Reciprocity
Uplink
Efficient Solution
Wireless Communication
High Throughput
Power Consumption
Antenna
Division
Electric power utilization

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Kim, S., & Shim, B. (2019). 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.. https://doi.org/10.1109/VTCFall.2018.8690646

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., 2019. 8690646 (IEEE Vehicular Technology Conference; Vol. 2018-August).

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

Kim, S & Shim, B 2019, 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
Kim S, Shim B. AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems. In 2018 IEEE 88th Vehicular Technology Conference, VTC-Fall 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2019. 8690646. (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VTCFall.2018.8690646
Kim, Seungnyun ; Shim, Byonghyo. / AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems. 2018 IEEE 88th Vehicular Technology Conference, VTC-Fall 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2019. (IEEE Vehicular Technology Conference).
@inproceedings{e236338250ea4d8abf72d7e3f6abd9f5,
title = "AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems",
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.",
author = "Seungnyun Kim and Byonghyo Shim",
year = "2019",
month = "4",
day = "12",
doi = "10.1109/VTCFall.2018.8690646",
language = "English",
series = "IEEE Vehicular Technology Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2018 IEEE 88th Vehicular Technology Conference, VTC-Fall 2018 - Proceedings",

}

TY - GEN

T1 - AoD-Based Statistical Beamforming for Cell-Free Massive MIMO Systems

AU - Kim, Seungnyun

AU - Shim, Byonghyo

PY - 2019/4/12

Y1 - 2019/4/12

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85064890041&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064890041&partnerID=8YFLogxK

U2 - 10.1109/VTCFall.2018.8690646

DO - 10.1109/VTCFall.2018.8690646

M3 - Conference contribution

T3 - IEEE Vehicular Technology Conference

BT - 2018 IEEE 88th Vehicular Technology Conference, VTC-Fall 2018 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

ER -