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On Dispersion and Multipath Effects in Harmonic Radar Imaging Applications

Bischeltsrieder, Florian and Peichl, Markus and Utschick, Wolfgang (2021) On Dispersion and Multipath Effects in Harmonic Radar Imaging Applications. Remote Sensing, 13 (5013). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/rs13245013. ISSN 2072-4292.

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Official URL: https://www.mdpi.com/2072-4292/13/24/5013

Abstract

In harmonic radar applications, it has been noticed that images produced using algorithms of conventional radar applications experience some defocusing effects of the electronic targets’ impulse response. This is typically explained by the dispersive transfer functions of the targets. In addition, it has been experimentally observed that objects with a linear transfer behavior do not contribute to the received signal of a harmonic radar measurement. However, some signal contributions based on a multipath propagation can overlay the desired signal, which leads to an undesired and unusual interference caused by the non-linear character of the electronic targets. In here, motivated by the analysis of measured harmonic radar data, the effects of both phenomena are investigated by theoretical derivations and simulation studies. By analyzing measurement data, we show that the dispersion effects are caused by the target, and not by the measurement system or the measurement geometry. To this end, a signal model is developed, with which it is possible to describe both effects, dispersion and multipath propagation. In addition, the discrepancy between classic radar imaging and harmonic radar is analyzed.

Item URL in elib:https://elib.dlr.de/146780/
Document Type:Article
Title:On Dispersion and Multipath Effects in Harmonic Radar Imaging Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bischeltsrieder, FlorianFlorian.Bischeltsrieder (at) dlr.deUNSPECIFIED
Peichl, MarkusMarkus.Peichl (at) dlr.deUNSPECIFIED
Utschick, Wolfgangutschick (at) tum.deUNSPECIFIED
Date:9 December 2021
Journal or Publication Title:Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:13
DOI :10.3390/rs13245013
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:Nonlinear Junction Detection and Harmonic Radar
ISSN:2072-4292
Status:Published
Keywords:harmonic, non-linear, radar, imaging, electronic target detection, dispersion, multipath propagation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Security-relevant Earth Observation
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Reconnaissance and Security
Deposited By: Bischeltsrieder, Florian
Deposited On:17 Dec 2021 12:05
Last Modified:20 Dec 2021 17:36

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