Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing

Ionospheric clutter is one of the main problems for high-frequency surface wave radars (HFSWRs), as it severely interferes with sea surface state monitoring and target detection. Although a number of methods exist for ionospheric clutter suppression, most are suitable for radars with a large-sized a...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Shuqin He, Hao Zhou, Yingwei Tian, Wei Shen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	adaptive filter crossed-loop antenna high-frequency surface wave radar ionospheric clutter recursive least squares current speed Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/a8a495fbdc2f4803bfa2f4dafa25cdc8
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:a8a495fbdc2f4803bfa2f4dafa25cdc8
record_format	dspace
spelling	oai:doaj.org-article:a8a495fbdc2f4803bfa2f4dafa25cdc82021-11-25T18:03:50ZIonospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing10.3390/jmse91111652077-1312https://doaj.org/article/a8a495fbdc2f4803bfa2f4dafa25cdc82021-10-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1165https://doaj.org/toc/2077-1312Ionospheric clutter is one of the main problems for high-frequency surface wave radars (HFSWRs), as it severely interferes with sea surface state monitoring and target detection. Although a number of methods exist for ionospheric clutter suppression, most are suitable for radars with a large-sized array and are inefficient for small-aperture radars. In this study, we added an auxiliary crossed-loop antenna to the original compact radar antenna, and used an adaptive filter to suppress the ionospheric clutter. The experimental results of the HFSWRs data indicated that the suppression factor of the ionospheric clutter was up to 20 dB. Therefore, the Bragg peaks that were originally submerged by the ionospheric clutters could be recovered, and the gaps in the current maps can, to a large extent, be filled. For an oceanographic radar, the purpose of suppressing ionospheric clutter is to extract an accurate current speed; the radial current fields that were generated by our method showed an acceptable agreement with those generated by GlobCurrent data. This result supports the notion that the ionospheric suppression technique does not compromise the estimation of radial currents. The proposed method is particularly efficient for a compact HFSWRs, and can also be easily used in other types of antennas.Shuqin HeHao ZhouYingwei TianWei ShenMDPI AGarticleadaptive filtercrossed-loop antennahigh-frequency surface wave radarionospheric clutterrecursive least squarescurrent speedNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1165, p 1165 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adaptive filter crossed-loop antenna high-frequency surface wave radar ionospheric clutter recursive least squares current speed Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	adaptive filter crossed-loop antenna high-frequency surface wave radar ionospheric clutter recursive least squares current speed Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Shuqin He Hao Zhou Yingwei Tian Wei Shen Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing
description	Ionospheric clutter is one of the main problems for high-frequency surface wave radars (HFSWRs), as it severely interferes with sea surface state monitoring and target detection. Although a number of methods exist for ionospheric clutter suppression, most are suitable for radars with a large-sized array and are inefficient for small-aperture radars. In this study, we added an auxiliary crossed-loop antenna to the original compact radar antenna, and used an adaptive filter to suppress the ionospheric clutter. The experimental results of the HFSWRs data indicated that the suppression factor of the ionospheric clutter was up to 20 dB. Therefore, the Bragg peaks that were originally submerged by the ionospheric clutters could be recovered, and the gaps in the current maps can, to a large extent, be filled. For an oceanographic radar, the purpose of suppressing ionospheric clutter is to extract an accurate current speed; the radial current fields that were generated by our method showed an acceptable agreement with those generated by GlobCurrent data. This result supports the notion that the ionospheric suppression technique does not compromise the estimation of radial currents. The proposed method is particularly efficient for a compact HFSWRs, and can also be easily used in other types of antennas.
format	article
author	Shuqin He Hao Zhou Yingwei Tian Wei Shen
author_facet	Shuqin He Hao Zhou Yingwei Tian Wei Shen
author_sort	Shuqin He
title	Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing
title_short	Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing
title_full	Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing
title_fullStr	Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing
title_full_unstemmed	Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing
title_sort	ionospheric clutter suppression with an auxiliary crossed-loop antenna in a high-frequency radar for sea surface remote sensing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a8a495fbdc2f4803bfa2f4dafa25cdc8
work_keys_str_mv	AT shuqinhe ionosphericcluttersuppressionwithanauxiliarycrossedloopantennainahighfrequencyradarforseasurfaceremotesensing AT haozhou ionosphericcluttersuppressionwithanauxiliarycrossedloopantennainahighfrequencyradarforseasurfaceremotesensing AT yingweitian ionosphericcluttersuppressionwithanauxiliarycrossedloopantennainahighfrequencyradarforseasurfaceremotesensing AT weishen ionosphericcluttersuppressionwithanauxiliarycrossedloopantennainahighfrequencyradarforseasurfaceremotesensing
_version_	1718411698470125568

Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing

Ejemplares similares