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In-Flight Multi-Channel Calibration for Along-Track Interferometric Airborne Radar

Barros Cardoso da Silva, Andre and Baumgartner, Stefan V. and Queiroz de Almeida, Felipe and Krieger, Gerhard (2020) In-Flight Multi-Channel Calibration for Along-Track Interferometric Airborne Radar. IEEE Transactions on Geoscience and Remote Sensing, pp. 1-18. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2020.3011287. ISSN 0196-2892.

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Official URL: https://ieeexplore.ieee.org/document/9160977


Multi-channel calibration is essential for detecting moving targets and for estimating their positions and velocities accurately. This paper presents a fast and efficient calibration algorithm for along-track multi-channel systems, in particular for space-time adaptive processing (STAP) techniques. The proposed algorithm corrects the phase and magnitude offsets of the receive channels, and also takes into account the Doppler centroid variation (e.g., caused by atmospheric turbulences) along slant range and azimuth time. The knowledge of the Doppler centroid variation is especially important for an accurate clutter covariance matrix estimation, which is required by STAP for efficient clutter suppression. Important calibration parameters and offsets are estimated directly from range-compressed training data. The proposed algorithm is evaluated based on real multi-channel X-band radar data acquired with DLR’s airborne system F-SAR and compared with the state-of-the-art digital channel balancing technique. The experimental results show the potential of the proposed calibration algorithm towards real-time applications.

Item URL in elib:https://elib.dlr.de/135728/
Document Type:Article
Title:In-Flight Multi-Channel Calibration for Along-Track Interferometric Airborne Radar
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Barros Cardoso da Silva, AndreUNSPECIFIEDhttps://orcid.org/0000-0001-5056-4013UNSPECIFIED
Baumgartner, Stefan V.UNSPECIFIEDhttps://orcid.org/0000-0002-8337-6825UNSPECIFIED
Queiroz de Almeida, FelipeUNSPECIFIEDhttps://orcid.org/0000-0001-5929-6633UNSPECIFIED
Krieger, GerhardUNSPECIFIEDhttps://orcid.org/0000-0002-4548-0285UNSPECIFIED
Date:6 August 2020
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-18
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Synthetic aperture radar (SAR), radar signal processing, radar applications, calibration, ground moving target indication (GMTI), airborne radar, traffic monitoring.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - D.MoVe (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Deposited By: Barros Cardoso da Silva, Andre
Deposited On:17 Aug 2020 08:07
Last Modified:06 Dec 2020 12:30

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