Compressed Sensing for the Detection and Positioning of Dielectric Objects Inside Metal Enclosures by Means of Microwave Measurements
Artikel i vetenskaplig tidskrift, 2017

Based on compressed sensing and microwave measurements, we present a procedure for the detection and positioning of dielectric objects inside a metal enclosure, where the number of objects is unknown but assumed to be limited. The formulation features a convex quadratic optimization problem with 1-norm regularization, which allows for rapid detection and positioning given a precomputed dictionary. The dictionary consists of the scattering parameters computed from a single scattering object placed at the grid points of a structured grid that covers the entire measurement region. We test our method experimentally in a microwave measurement system that features a measurement region with a diameter of 11.6 cm. The measurement region is encircled by six aperture antennas, where each aperture is the end-opening of a rectangular waveguide operated from 2.7 to 4.2 GHz. We use acrylic-glass cylinders of radius 5.2 mm as scatterers and find that the compressed sensing method can correctly detect at least up to five scatterers with an average positioning accuracy of 3 mm. In addition, we investigate the performance of the method with respect to scarcity of data, where we omit scattering parameters or frequency points.

Microwave measurement

Permittivity measurement

Metals

Scattering

Dielectrics

Compressed sensing

Författare

JOHAN WINGES

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Livia Cerullo

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Thomas Rylander

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Tomas McKelvey

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Mats Viberg

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. PP 1-15

Ämneskategorier

Beräkningsmatematik

Elektroteknik och elektronik

Signalbehandling

Fundament

Grundläggande vetenskaper

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1109/TMTT.2017.2708109