LensFD: Using Lenses for Improved Sub-6 GHz Massive MIMO Full-Duplex

Zhican Chen; C. Nicolas Barati; Jon Veihl; Clayton Shepard; Ashutosh Sabharwal

doi:10.1109/TVT.2023.3240558

LensFD: Using Lenses for Improved Sub-6 GHz Massive MIMO Full-Duplex

Zhican Chen, C. Nicolas Barati, Jon Veihl, Clayton Shepard, Ashutosh Sabharwal

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Massive MIMO has emerged as a key-enabler to deliver the high data-rates in current and next-generation systems. Many massive MIMO deployments use time-division duplex (TDD), thereby opening the door for the potential use of full-duplex at base-stations. In this paper, we present LensFD, a scalable method to enable cost-effective massive MIMO full-duplex operation in sub-6 GHz frequencies with a focus on the CBRS band of 3.5 GHz. LensFD uses a low-cost lens array combined with transmit precoding to reshape the effective beam pattern of antennas in massive MIMO arrays to reduce self-interference. We tested three lens configurations in LensFD experimentally with a software-defined 40-antenna base-station and demonstrate a significant improvement in self-interference reduction and hence overall increased system capacity to 1.6× over the TDD counterpart. As an important contribution, we will open-source the large measurement dataset from our experiments.

Original language	English (US)
Pages (from-to)	7517-7529
Number of pages	13
Journal	IEEE Transactions on Vehicular Technology
Volume	72
Issue number	6
DOIs	https://doi.org/10.1109/TVT.2023.3240558
State	Published - Jun 1 2023

Keywords

Massive MIMO
dielectric spherical lenses
experimental design
full-duplex
precoding

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Computer Networks and Communications
Electrical and Electronic Engineering

Access to Document

10.1109/TVT.2023.3240558

Cite this

@article{de452028acf8489f8d05ed0182a90213,

title = "LensFD: Using Lenses for Improved Sub-6 GHz Massive MIMO Full-Duplex",

abstract = "Massive MIMO has emerged as a key-enabler to deliver the high data-rates in current and next-generation systems. Many massive MIMO deployments use time-division duplex (TDD), thereby opening the door for the potential use of full-duplex at base-stations. In this paper, we present LensFD, a scalable method to enable cost-effective massive MIMO full-duplex operation in sub-6 GHz frequencies with a focus on the CBRS band of 3.5 GHz. LensFD uses a low-cost lens array combined with transmit precoding to reshape the effective beam pattern of antennas in massive MIMO arrays to reduce self-interference. We tested three lens configurations in LensFD experimentally with a software-defined 40-antenna base-station and demonstrate a significant improvement in self-interference reduction and hence overall increased system capacity to 1.6× over the TDD counterpart. As an important contribution, we will open-source the large measurement dataset from our experiments.",

keywords = "Massive MIMO, dielectric spherical lenses, experimental design, full-duplex, precoding",

author = "Zhican Chen and Barati, {C. Nicolas} and Jon Veihl and Clayton Shepard and Ashutosh Sabharwal",

note = "Funding Information: This work was supported in part by NSF under Grants CNS-2120363 and CNS-2106993, and in part by NSF PAWR under Grant CNS-1827940. The review of this article was coordinated by Dr. Nghi H. Tran. Publisher Copyright: {\textcopyright} 2023 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.",

year = "2023",

month = jun,

day = "1",

doi = "10.1109/TVT.2023.3240558",

language = "English (US)",

volume = "72",

pages = "7517--7529",

journal = "IEEE Transactions on Vehicular Technology",

issn = "0018-9545",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "6",

}

TY - JOUR

T1 - LensFD

T2 - Using Lenses for Improved Sub-6 GHz Massive MIMO Full-Duplex

AU - Chen, Zhican

AU - Barati, C. Nicolas

AU - Veihl, Jon

AU - Shepard, Clayton

AU - Sabharwal, Ashutosh

N1 - Funding Information: This work was supported in part by NSF under Grants CNS-2120363 and CNS-2106993, and in part by NSF PAWR under Grant CNS-1827940. The review of this article was coordinated by Dr. Nghi H. Tran. Publisher Copyright: © 2023 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.

PY - 2023/6/1

Y1 - 2023/6/1

N2 - Massive MIMO has emerged as a key-enabler to deliver the high data-rates in current and next-generation systems. Many massive MIMO deployments use time-division duplex (TDD), thereby opening the door for the potential use of full-duplex at base-stations. In this paper, we present LensFD, a scalable method to enable cost-effective massive MIMO full-duplex operation in sub-6 GHz frequencies with a focus on the CBRS band of 3.5 GHz. LensFD uses a low-cost lens array combined with transmit precoding to reshape the effective beam pattern of antennas in massive MIMO arrays to reduce self-interference. We tested three lens configurations in LensFD experimentally with a software-defined 40-antenna base-station and demonstrate a significant improvement in self-interference reduction and hence overall increased system capacity to 1.6× over the TDD counterpart. As an important contribution, we will open-source the large measurement dataset from our experiments.

AB - Massive MIMO has emerged as a key-enabler to deliver the high data-rates in current and next-generation systems. Many massive MIMO deployments use time-division duplex (TDD), thereby opening the door for the potential use of full-duplex at base-stations. In this paper, we present LensFD, a scalable method to enable cost-effective massive MIMO full-duplex operation in sub-6 GHz frequencies with a focus on the CBRS band of 3.5 GHz. LensFD uses a low-cost lens array combined with transmit precoding to reshape the effective beam pattern of antennas in massive MIMO arrays to reduce self-interference. We tested three lens configurations in LensFD experimentally with a software-defined 40-antenna base-station and demonstrate a significant improvement in self-interference reduction and hence overall increased system capacity to 1.6× over the TDD counterpart. As an important contribution, we will open-source the large measurement dataset from our experiments.

KW - Massive MIMO

KW - dielectric spherical lenses

KW - experimental design

KW - full-duplex

KW - precoding

UR - http://www.scopus.com/inward/record.url?scp=85148469443&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85148469443&partnerID=8YFLogxK

U2 - 10.1109/TVT.2023.3240558

DO - 10.1109/TVT.2023.3240558

M3 - Article

AN - SCOPUS:85148469443

SN - 0018-9545

VL - 72

SP - 7517

EP - 7529

JO - IEEE Transactions on Vehicular Technology

JF - IEEE Transactions on Vehicular Technology

IS - 6

ER -

LensFD: Using Lenses for Improved Sub-6 GHz Massive MIMO Full-Duplex

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this