Direct Localization for Massive MIMO
Artikel i vetenskaplig tidskrift, 2017

Large-scale MIMO systems are well known for their advantages in communications, but they also have the potential for providing very accurate localization, thanks to their high angular resolution. A difficult problem arising indoors and outdoors is localizing users over multipath channels. Localization based on angle of arrival (AOA) generally involves a two-step procedure, where signals are first processed to obtain a user's AOA at different base stations, followed by triangulation to determine the user's position. In the presence of multipath, the performance of these methods is greatly degraded due to the inability to correctly detect and/or estimate the AOA of the line-of-sight (LOS) paths. To counter the limitations of this two-step procedure which is inherently suboptimal, we propose a direct localization approach in which the position of a user is localized by jointly processing the observations obtained at distributed massive MIMO base stations. Our approach is based on a novel compressed sensing framework that exploits channel properties to distinguish LOS from non-LOS signal paths, and leads to improved performance results compared to previous existing methods.

Array signal processing

parameter estimation

multipath channels

Antenna arrays

Position measurement

5G mobile communication

MIMO

navigation

position measurement

Antenna accessories

Base stations

compressed sensing

signal processing algorithms

sparse matrices

Estimation

direction-of-arrival estimation

antenna arrays

MIMO

base stations

Författare

Nil Garcia

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Henk Wymeersch

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

E. G. Larsson

Linkopings universitet

Alexander M. Haimovich

New Jersey Institute of Technology

Martial Coulon

Universite de Toulouse

IEEE Transactions on Signal Processing

1053-587X (ISSN)

Vol. 65 2475-2487 7849233

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Signalbehandling

DOI

10.1109/TSP.2017.2666779