Research on Dual-Frequency Electromagnetic False Alarm Interference Effect of a Typical Radar

In order to master the position variation rule of radar false alarm signal under continuous wave (CW) electromagnetic interference and reveal the mechanism of CW on radar, taking a certain type of stepping frequency radar as the research object, theoretical analysis of the imaging mechanism of radar...

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Autores principales: Du, Xue, Wei, Guanghui, Zhao, Kai, Zhao, Hongze, Lyu, Xuxu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9105307/
https://www.ncbi.nlm.nih.gov/pubmed/35591264
http://dx.doi.org/10.3390/s22093574
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author Du, Xue
Wei, Guanghui
Zhao, Kai
Zhao, Hongze
Lyu, Xuxu
author_facet Du, Xue
Wei, Guanghui
Zhao, Kai
Zhao, Hongze
Lyu, Xuxu
author_sort Du, Xue
collection PubMed
description In order to master the position variation rule of radar false alarm signal under continuous wave (CW) electromagnetic interference and reveal the mechanism of CW on radar, taking a certain type of stepping frequency radar as the research object, theoretical analysis of the imaging mechanism of radar CW electromagnetic interference false alarm signals from the perspective of time-frequency decoupling and receiver signal processing. Secondly, electromagnetic interference injection method is used to test the single-frequency and dual-frequency electromagnetic interference effect of the tested equipment. The results show that under the single frequency CW electromagnetic interference, the sensitive bandwidth of false alarm signal is about ±75 MHz, and the position of false alarm signal irregularity changes. Under the in-band dual-frequency CW electromagnetic interference, the position of non-intermodulation false alarm signal is similar to that of single frequency. However, the distance difference of two non-intermodulation false alarm signals is regular. In addition, the positions of the second-order intermodulation false alarm signals of the tested radar are also regular, and its position changes with the change of the second-order intermodulation frequency difference.
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spelling pubmed-91053072022-05-14 Research on Dual-Frequency Electromagnetic False Alarm Interference Effect of a Typical Radar Du, Xue Wei, Guanghui Zhao, Kai Zhao, Hongze Lyu, Xuxu Sensors (Basel) Article In order to master the position variation rule of radar false alarm signal under continuous wave (CW) electromagnetic interference and reveal the mechanism of CW on radar, taking a certain type of stepping frequency radar as the research object, theoretical analysis of the imaging mechanism of radar CW electromagnetic interference false alarm signals from the perspective of time-frequency decoupling and receiver signal processing. Secondly, electromagnetic interference injection method is used to test the single-frequency and dual-frequency electromagnetic interference effect of the tested equipment. The results show that under the single frequency CW electromagnetic interference, the sensitive bandwidth of false alarm signal is about ±75 MHz, and the position of false alarm signal irregularity changes. Under the in-band dual-frequency CW electromagnetic interference, the position of non-intermodulation false alarm signal is similar to that of single frequency. However, the distance difference of two non-intermodulation false alarm signals is regular. In addition, the positions of the second-order intermodulation false alarm signals of the tested radar are also regular, and its position changes with the change of the second-order intermodulation frequency difference. MDPI 2022-05-07 /pmc/articles/PMC9105307/ /pubmed/35591264 http://dx.doi.org/10.3390/s22093574 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Du, Xue
Wei, Guanghui
Zhao, Kai
Zhao, Hongze
Lyu, Xuxu
Research on Dual-Frequency Electromagnetic False Alarm Interference Effect of a Typical Radar
title Research on Dual-Frequency Electromagnetic False Alarm Interference Effect of a Typical Radar
title_full Research on Dual-Frequency Electromagnetic False Alarm Interference Effect of a Typical Radar
title_fullStr Research on Dual-Frequency Electromagnetic False Alarm Interference Effect of a Typical Radar
title_full_unstemmed Research on Dual-Frequency Electromagnetic False Alarm Interference Effect of a Typical Radar
title_short Research on Dual-Frequency Electromagnetic False Alarm Interference Effect of a Typical Radar
title_sort research on dual-frequency electromagnetic false alarm interference effect of a typical radar
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9105307/
https://www.ncbi.nlm.nih.gov/pubmed/35591264
http://dx.doi.org/10.3390/s22093574
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