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Phase Correction for Accurate DOA Angle and Position Estimation of Ground Moving Targets using Multi-Channel Airborne Radar

Barros Cardoso da Silva, Andre and Joshi, Sushil Kumar and Baumgartner, Stefan V. and Queiroz de Almeida, Felipe and Krieger, Gerhard (2022) Phase Correction for Accurate DOA Angle and Position Estimation of Ground Moving Targets using Multi-Channel Airborne Radar. IEEE Geoscience and Remote Sensing Letters. IEEE - Institute of Electrical and Electronics Engineers. ISSN 1545-598X.

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Abstract

Accurate position estimation of the ground moving targets is a crucial requirement for any radar-based surveillance system. For multi-channel airborne radar, the target position on ground can be accurately obtained by estimating the direction-of-arrival (DOA) angle of the moving targets. However, in practice the aircraft motion caused by atmospheric turbulence tilts the antenna array and introduces undesired phase differences among the multiple receive channels. As a result, the accuracy of the estimated DOA angles can be severely affected. This letter presents a robust and efficient algorithm that corrects the undesired phase differences among the multiple receive channels. By doing this, accurate DOA angles and, therefore, accurate target positions on the ground can be estimated. Important inputs of the proposed algorithm are the precise absolute positions of the receive channels and the elevation of the terrain. The performance of the proposed algorithm is validated using both simulated and real radar data acquired with the DLR’s multi-channel airborne system DBFSAR.

Item URL in elib:https://elib.dlr.de/145847/
Document Type:Article
Title:Phase Correction for Accurate DOA Angle and Position Estimation of Ground Moving Targets using Multi-Channel Airborne Radar
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Barros Cardoso da Silva, AndreAndre.Silva (at) dlr.dehttps://orcid.org/0000-0001-5056-4013
Joshi, Sushil KumarSushil.Joshi (at) dlr.dehttps://orcid.org/0000-0002-4494-5255
Baumgartner, Stefan V.Stefan.Baumgartner (at) dlr.dehttps://orcid.org/0000-0002-8337-6825
Queiroz de Almeida, FelipeFelipe.QueirozdeAlmeida (at) dlr.dehttps://orcid.org/0000-0001-5929-6633
Krieger, GerhardGerhard.Krieger (at) dlr.dehttps://orcid.org/0000-0002-4548-0285
Date:2022
Journal or Publication Title:IEEE Geoscience and Remote Sensing Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:1545-598X
Status:Accepted
Keywords:Ground moving target indication (GMTI), radar signal processing, calibration, synthetic aperture radar (SAR), radar applications, airborne radar, maritime safety.
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
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Deposited By: Barros Cardoso da Silva, Andre
Deposited On:18 Nov 2021 15:18
Last Modified:11 Jan 2022 11:43

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