Improved pilot designs for enhancing connectivity in multicarrier massive MIMO systems

The Khai Nguyen; Ha H. Nguyen; Hoang D. Tuan; Hien Quoc Ngo

doi:10.1109/LWC.2022.3155610

Improved pilot designs for enhancing connectivity in multicarrier massive MIMO systems

The Khai Nguyen^*, Ha H. Nguyen, Hoang D. Tuan, Hien Quoc Ngo

^*Corresponding author for this work

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

Abstract

This letter proposes improved pilot designs to enhance the connectivity of multicarrier massive MIMO systems. Exploiting the fact that orthogonal frequency-division multiplexing (OFDM) training symbols end with zero samples, the proposed pilot designs reduce pilot overhead by truncating the zero samples and/or intentionally using them for a guard interval without affecting the channel estimation quality. The proposed designs allow a massive MIMO system either to serve more users with a fixed amount of training time, or requires less training time for a fixed number of users. Numerical results obtained for a cell-free massive MIMO system (as an application use case) demonstrate significant improvements in connectivity and spectral efficiency by the proposed designs over the conventional designs.

Original language	English
Pages (from-to)	1057-1061
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	11
Issue number	5
DOIs	https://doi.org/10.1109/LWC.2022.3155610
Publication status	Published - 01 Mar 2022

Bibliographical note

Funding Information:
This work was supported in part by the Discovery Grant from the Natural Sciences and Engineering Research Council of Canada (NSERC)

Publisher Copyright:
© 2012 IEEE.

Keywords

Massive MIMO
OFDM
pilot design

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/LWC.2022.3155610Licence: Unspecified

Cite this

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abstract = "This letter proposes improved pilot designs to enhance the connectivity of multicarrier massive MIMO systems. Exploiting the fact that orthogonal frequency-division multiplexing (OFDM) training symbols end with zero samples, the proposed pilot designs reduce pilot overhead by truncating the zero samples and/or intentionally using them for a guard interval without affecting the channel estimation quality. The proposed designs allow a massive MIMO system either to serve more users with a fixed amount of training time, or requires less training time for a fixed number of users. Numerical results obtained for a cell-free massive MIMO system (as an application use case) demonstrate significant improvements in connectivity and spectral efficiency by the proposed designs over the conventional designs. ",

keywords = "Massive MIMO, OFDM, pilot design",

author = "Nguyen, {The Khai} and Nguyen, {Ha H.} and Tuan, {Hoang D.} and Ngo, {Hien Quoc}",

note = "Funding Information: This work was supported in part by the Discovery Grant from the Natural Sciences and Engineering Research Council of Canada (NSERC) Publisher Copyright: {\textcopyright} 2012 IEEE.",

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AB - This letter proposes improved pilot designs to enhance the connectivity of multicarrier massive MIMO systems. Exploiting the fact that orthogonal frequency-division multiplexing (OFDM) training symbols end with zero samples, the proposed pilot designs reduce pilot overhead by truncating the zero samples and/or intentionally using them for a guard interval without affecting the channel estimation quality. The proposed designs allow a massive MIMO system either to serve more users with a fixed amount of training time, or requires less training time for a fixed number of users. Numerical results obtained for a cell-free massive MIMO system (as an application use case) demonstrate significant improvements in connectivity and spectral efficiency by the proposed designs over the conventional designs.

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KW - OFDM

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Improved pilot designs for enhancing connectivity in multicarrier massive MIMO systems

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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