Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection

In this paper, an ultra-low-altitude target (ULAT) detection approach, referred to as the multi-resolution space-time adaptive processing (STAP), is proposed to enhance the target detection performance in a missile-borne radar system. In this respect, the whole base band is divided into a series of...

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Autores principales:	Haodong Li, Guisheng Liao, Jingwei Xu, Cao Zeng, Xiongpeng He, Pengfei Gao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	frequency diversity multi-resolution multipath signal space-time adaptive processing (STAP) ultra-low-altitude target Science Q
Acceso en línea:	https://doaj.org/article/df968f19b0ba42fcab8019b26b3fbf62
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id	oai:doaj.org-article:df968f19b0ba42fcab8019b26b3fbf62
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spelling	oai:doaj.org-article:df968f19b0ba42fcab8019b26b3fbf622021-11-11T18:50:14ZMulti-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection10.3390/rs132142122072-4292https://doaj.org/article/df968f19b0ba42fcab8019b26b3fbf622021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4212https://doaj.org/toc/2072-4292In this paper, an ultra-low-altitude target (ULAT) detection approach, referred to as the multi-resolution space-time adaptive processing (STAP), is proposed to enhance the target detection performance in a missile-borne radar system. In this respect, the whole base band is divided into a series of equal-width and center-frequency-diverse sub-bands with the frequency diversity technique, which enhances the multipath-target coupled (MTC) effect with the decreased range resolution. Hence, it is feasible to exploit the multipath signal power to improve the output signal-to-clutter-plus-noise ratio (SCNR) performance of sub-band STAP. In this regard, the mechanism of the MTC effect is analyzed numerically for the efficient sub-band STAP. However, such SCNR improvement is achieved at the cost of target tracking performance loss. Hence, the full-band STAP is further applied for multipath-target separation based on the target range-Doppler locations detected by the joint multiple sub-bands ΣΔ-STAP, which also alleviates the dynamic target attenuation and the corresponding target Doppler history corruption within the long coherent processing interval (CPI). On this basis, the SCNR performance is further improved by applying coherent accumulation among sub-CPIs, in which the clutter suppression performance degradation and coherent accumulation loss of STAP are alleviated within the sub-CPIs. Numerical and measured results corroborate the effectiveness of ULAT detection with the considered multi-resolution STAP.Haodong LiGuisheng LiaoJingwei XuCao ZengXiongpeng HePengfei GaoMDPI AGarticlefrequency diversitymulti-resolutionmultipath signalspace-time adaptive processing (STAP)ultra-low-altitude targetScienceQENRemote Sensing, Vol 13, Iss 4212, p 4212 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	frequency diversity multi-resolution multipath signal space-time adaptive processing (STAP) ultra-low-altitude target Science Q
spellingShingle	frequency diversity multi-resolution multipath signal space-time adaptive processing (STAP) ultra-low-altitude target Science Q Haodong Li Guisheng Liao Jingwei Xu Cao Zeng Xiongpeng He Pengfei Gao Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection
description	In this paper, an ultra-low-altitude target (ULAT) detection approach, referred to as the multi-resolution space-time adaptive processing (STAP), is proposed to enhance the target detection performance in a missile-borne radar system. In this respect, the whole base band is divided into a series of equal-width and center-frequency-diverse sub-bands with the frequency diversity technique, which enhances the multipath-target coupled (MTC) effect with the decreased range resolution. Hence, it is feasible to exploit the multipath signal power to improve the output signal-to-clutter-plus-noise ratio (SCNR) performance of sub-band STAP. In this regard, the mechanism of the MTC effect is analyzed numerically for the efficient sub-band STAP. However, such SCNR improvement is achieved at the cost of target tracking performance loss. Hence, the full-band STAP is further applied for multipath-target separation based on the target range-Doppler locations detected by the joint multiple sub-bands ΣΔ-STAP, which also alleviates the dynamic target attenuation and the corresponding target Doppler history corruption within the long coherent processing interval (CPI). On this basis, the SCNR performance is further improved by applying coherent accumulation among sub-CPIs, in which the clutter suppression performance degradation and coherent accumulation loss of STAP are alleviated within the sub-CPIs. Numerical and measured results corroborate the effectiveness of ULAT detection with the considered multi-resolution STAP.
format	article
author	Haodong Li Guisheng Liao Jingwei Xu Cao Zeng Xiongpeng He Pengfei Gao
author_facet	Haodong Li Guisheng Liao Jingwei Xu Cao Zeng Xiongpeng He Pengfei Gao
author_sort	Haodong Li
title	Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection
title_short	Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection
title_full	Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection
title_fullStr	Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection
title_full_unstemmed	Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection
title_sort	multi-resolution stap for enhanced ultra-low-altitude target detection
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/df968f19b0ba42fcab8019b26b3fbf62
work_keys_str_mv	AT haodongli multiresolutionstapforenhancedultralowaltitudetargetdetection AT guishengliao multiresolutionstapforenhancedultralowaltitudetargetdetection AT jingweixu multiresolutionstapforenhancedultralowaltitudetargetdetection AT caozeng multiresolutionstapforenhancedultralowaltitudetargetdetection AT xiongpenghe multiresolutionstapforenhancedultralowaltitudetargetdetection AT pengfeigao multiresolutionstapforenhancedultralowaltitudetargetdetection
_version_	1718431735721492480

Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection

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