Auto-calibration and Tomographic Reconstruction of Permittivity using a High Resolution Radar System

Pathuri-Bhuvana V, Och A, Schuster S (2021)

Publication Type: Conference contribution

Publication year: 2021

Journal

Conference Record of the Asilomar Conference on Signals, Systems and Computers Institute of Electrical and Electronics Engineers

Publisher: IEEE Computer Society

Book Volume: 2021-October

Pages Range: 1061-1064

Conference Proceedings Title: Conference Record - Asilomar Conference on Signals, Systems and Computers

Event location: Pacific Grove, CA US

ISBN: 9781665458283

DOI: 10.1109/IEEECONF53345.2021.9723146

Abstract

This paper proposes an auto-calibration and tomography method to characterize low permittivity materials in a region of interest using time-of-flight measurements from a high resolution millimeter-wave radar system. In contrary to tomography methods with offline calibration, the proposed method uses the same set of time-of-flight measurements to perform simultaneous calibration and tomographic reconstruction. The proposed method uses the variable projection approach to separate and estimate the calibration parameters and tomography parameters independently from each other. Furthermore, the proposed method can also incorporate the prior information about the calibration parameters into the inherent least squares cost function. The incorporation of the prior information can limit the search space of the inherent least squares optimization. Thus, it helps the proposed method to efficiently find the optimum values for both the tomography and calibration parameters. The proposed method is evaluated using both the measurement data and simulation data. In measurement and simulation results, the auto-calibration and tomography method shows significantly better performance in terms of permittivity estimation accuracy compared to the least squares based approaches without calibration and online calibration and tomography approaches without constraints.

Authors with CRIS profile

Andreas Och Lehrstuhl für Technische Elektronik (LTE)

Involved external institutions

Silicon Austria Labs AT Austria (AT) voestalpine Stahl GmbH AT Austria (AT)

How to cite

APA:

Pathuri-Bhuvana, V., Och, A., & Schuster, S. (2021). Auto-calibration and Tomographic Reconstruction of Permittivity using a High Resolution Radar System. In Michael B. Matthews (Eds.), Conference Record - Asilomar Conference on Signals, Systems and Computers (pp. 1061-1064). Pacific Grove, CA, US: IEEE Computer Society.

MLA:

Pathuri-Bhuvana, Venkata, Andreas Och, and Stefan Schuster. "Auto-calibration and Tomographic Reconstruction of Permittivity using a High Resolution Radar System." Proceedings of the 55th Asilomar Conference on Signals, Systems and Computers, ACSSC 2021, Pacific Grove, CA Ed. Michael B. Matthews, IEEE Computer Society, 2021. 1061-1064.

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