Radar imaging complex with SAR and ASR for aerospace vechicle

The subject of study in the article is the algorithms for radio monitoring of the Earth in a wide field of view from aerospace transport. The goal is to design a structural diagram of a radio complex that can operate simultaneously in two modes: modified synthetic aperture (SAR) and aperture synthes...

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Autores principales:	Volodimir Pavlikov, Konstantin Belousov, Simeon Zhyla, Eduard Tserne, Olexandr Shmatko, Anton Sobkolov, Dmytro Vlasenko, Volodimir Kosharskyi, Olexiy Odokiienko, Mykola Ruzhentsev
Formato:	article
Lenguaje:	EN RU UK
Publicado:	National Aerospace University «Kharkiv Aviation Institute» 2021
Materias:	radar imaging synthetic aperture radar aperture synthesis radar signal processing algorithm ultrawideband signal processing Computer engineering. Computer hardware TK7885-7895 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/83f0953b82464c378a144a77bbafec19
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spelling	oai:doaj.org-article:83f0953b82464c378a144a77bbafec192021-11-23T12:47:11ZRadar imaging complex with SAR and ASR for aerospace vechicle1814-42252663-201210.32620/reks.2021.3.06https://doaj.org/article/83f0953b82464c378a144a77bbafec192021-10-01T00:00:00Zhttp://nti.khai.edu/ojs/index.php/reks/article/view/1531https://doaj.org/toc/1814-4225https://doaj.org/toc/2663-2012The subject of study in the article is the algorithms for radio monitoring of the Earth in a wide field of view from aerospace transport. The goal is to design a structural diagram of a radio complex that can operate simultaneously in two modes: modified synthetic aperture (SAR) and aperture synthesis (ASR), in accordance with algorithms synthesized by the maximum likelihood method. The modified SAR mode allows obtaining high-resolution radio images in the observation angle range ±(20°...50°) from the direction to the nadir. A method of combining a modified SAR algorithm is used, which differs from the classical imaging algorithm by the possibility of obtaining a higher spatial resolution, the payment for this is the complication of the signal processing algorithm associated with the implementation of decorrelating filters that expand the spectrum of received signals in each receiving path, and the ASR mode, which allows imaging using passive or active radar principles. The passive ASR mode provides for the imaging in the observation angle range of ±20° from the nadir based on the results of processing signals of its own broadband radio-thermal radiation, and the active mode – in the same observation angle range, but using the broadband noise signal of the backlight. An important result in the formation of a radio image in the specified viewing area when using the active mode of the ASR is that the images are close in physical content, namely, proportional to the specific effective reflection surface of the underlying surface. In addition, a distinctive feature of the synthesized algorithms is the use of wideband probing signals and, accordingly, the same input paths of receivers, which makes it possible to increase the signal-to-noise ratio of the output effect. Conclusions. The scientific novelty of the results obtained is as follows: a structural diagram of the radio complex was developed on the basis of algorithms synthesized by the maximum likelihood method. For the formation of a radio image in the radio complex, a combination of SAR and ASR (with two modes of operation) is implemented. This implementation is important, since it allows obtaining high-resolution images in the observation angle range of ±50° from the direction to the nadir. It is advisable to place the complex on airplanes, helicopters and spacecraft (preferably those that move in low orbits).Volodimir PavlikovKonstantin BelousovSimeon ZhylaEduard TserneOlexandr ShmatkoAnton SobkolovDmytro VlasenkoVolodimir KosharskyiOlexiy OdokiienkoMykola RuzhentsevNational Aerospace University «Kharkiv Aviation Institute»articleradar imagingsynthetic aperture radaraperture synthesis radarsignal processing algorithmultrawideband signal processingComputer engineering. Computer hardwareTK7885-7895Electronic computers. Computer scienceQA75.5-76.95ENRUUKРадіоелектронні і комп'ютерні системи, Vol 0, Iss 3, Pp 63-78 (2021)
institution	DOAJ
collection	DOAJ
language	EN RU UK
topic	radar imaging synthetic aperture radar aperture synthesis radar signal processing algorithm ultrawideband signal processing Computer engineering. Computer hardware TK7885-7895 Electronic computers. Computer science QA75.5-76.95
spellingShingle	radar imaging synthetic aperture radar aperture synthesis radar signal processing algorithm ultrawideband signal processing Computer engineering. Computer hardware TK7885-7895 Electronic computers. Computer science QA75.5-76.95 Volodimir Pavlikov Konstantin Belousov Simeon Zhyla Eduard Tserne Olexandr Shmatko Anton Sobkolov Dmytro Vlasenko Volodimir Kosharskyi Olexiy Odokiienko Mykola Ruzhentsev Radar imaging complex with SAR and ASR for aerospace vechicle
description	The subject of study in the article is the algorithms for radio monitoring of the Earth in a wide field of view from aerospace transport. The goal is to design a structural diagram of a radio complex that can operate simultaneously in two modes: modified synthetic aperture (SAR) and aperture synthesis (ASR), in accordance with algorithms synthesized by the maximum likelihood method. The modified SAR mode allows obtaining high-resolution radio images in the observation angle range ±(20°...50°) from the direction to the nadir. A method of combining a modified SAR algorithm is used, which differs from the classical imaging algorithm by the possibility of obtaining a higher spatial resolution, the payment for this is the complication of the signal processing algorithm associated with the implementation of decorrelating filters that expand the spectrum of received signals in each receiving path, and the ASR mode, which allows imaging using passive or active radar principles. The passive ASR mode provides for the imaging in the observation angle range of ±20° from the nadir based on the results of processing signals of its own broadband radio-thermal radiation, and the active mode – in the same observation angle range, but using the broadband noise signal of the backlight. An important result in the formation of a radio image in the specified viewing area when using the active mode of the ASR is that the images are close in physical content, namely, proportional to the specific effective reflection surface of the underlying surface. In addition, a distinctive feature of the synthesized algorithms is the use of wideband probing signals and, accordingly, the same input paths of receivers, which makes it possible to increase the signal-to-noise ratio of the output effect. Conclusions. The scientific novelty of the results obtained is as follows: a structural diagram of the radio complex was developed on the basis of algorithms synthesized by the maximum likelihood method. For the formation of a radio image in the radio complex, a combination of SAR and ASR (with two modes of operation) is implemented. This implementation is important, since it allows obtaining high-resolution images in the observation angle range of ±50° from the direction to the nadir. It is advisable to place the complex on airplanes, helicopters and spacecraft (preferably those that move in low orbits).
format	article
author	Volodimir Pavlikov Konstantin Belousov Simeon Zhyla Eduard Tserne Olexandr Shmatko Anton Sobkolov Dmytro Vlasenko Volodimir Kosharskyi Olexiy Odokiienko Mykola Ruzhentsev
author_facet	Volodimir Pavlikov Konstantin Belousov Simeon Zhyla Eduard Tserne Olexandr Shmatko Anton Sobkolov Dmytro Vlasenko Volodimir Kosharskyi Olexiy Odokiienko Mykola Ruzhentsev
author_sort	Volodimir Pavlikov
title	Radar imaging complex with SAR and ASR for aerospace vechicle
title_short	Radar imaging complex with SAR and ASR for aerospace vechicle
title_full	Radar imaging complex with SAR and ASR for aerospace vechicle
title_fullStr	Radar imaging complex with SAR and ASR for aerospace vechicle
title_full_unstemmed	Radar imaging complex with SAR and ASR for aerospace vechicle
title_sort	radar imaging complex with sar and asr for aerospace vechicle
publisher	National Aerospace University «Kharkiv Aviation Institute»
publishDate	2021
url	https://doaj.org/article/83f0953b82464c378a144a77bbafec19
work_keys_str_mv	AT volodimirpavlikov radarimagingcomplexwithsarandasrforaerospacevechicle AT konstantinbelousov radarimagingcomplexwithsarandasrforaerospacevechicle AT simeonzhyla radarimagingcomplexwithsarandasrforaerospacevechicle AT eduardtserne radarimagingcomplexwithsarandasrforaerospacevechicle AT olexandrshmatko radarimagingcomplexwithsarandasrforaerospacevechicle AT antonsobkolov radarimagingcomplexwithsarandasrforaerospacevechicle AT dmytrovlasenko radarimagingcomplexwithsarandasrforaerospacevechicle AT volodimirkosharskyi radarimagingcomplexwithsarandasrforaerospacevechicle AT olexiyodokiienko radarimagingcomplexwithsarandasrforaerospacevechicle AT mykolaruzhentsev radarimagingcomplexwithsarandasrforaerospacevechicle
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Radar imaging complex with SAR and ASR for aerospace vechicle

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