Range Ambiguity Suppression Approach for Quad-pol SAR Systems Based on Modified Azimuth Phase Coding

For conventional quadrature-polarimetric (quad-pol) Synthetic Aperture Radar (SAR) systems, as cross-polarized (cross-pol) channels are influenced by the strong co-polarized (co-pol) range ambiguous returns, the range ambiguity levels of cross-polchannels are markedly reduced, which severely restric...

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Main Authors: Zhu Xiaojing, Li Fei, Wang Robert, Wang Wei, Sun Xiang
Format: Article
Language:English
Published: China Science Publishing & Media Ltd. (CSPM) 2017-08-01
Series:Leida xuebao
Subjects:
Online Access:http://radars.ie.ac.cn/fileup/HTML/R17015.htm
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author Zhu Xiaojing
Li Fei
Wang Robert
Wang Wei
Sun Xiang
author_facet Zhu Xiaojing
Li Fei
Wang Robert
Wang Wei
Sun Xiang
author_sort Zhu Xiaojing
collection DOAJ
description For conventional quadrature-polarimetric (quad-pol) Synthetic Aperture Radar (SAR) systems, as cross-polarized (cross-pol) channels are influenced by the strong co-polarized (co-pol) range ambiguous returns, the range ambiguity levels of cross-polchannels are markedly reduced, which severely restricts the unambiguous swaths. A novel transmission scheme called a hybrid-polarimetric (hybrid-pol) mode is introduced to enhance the range ambiguity levels of cross-pol channels. This scheme improves the performance of cross-pol channels with regards to range ambiguity but deteriorates that of co-pol channels. Therefore, to further enhance the range ambiguity levels of quad-pol SAR systems, the Modified Azimuth Phase Coding (MAPC) technique based on hybrid-pol SAR systems is proposed in this study. By taking advantage of the MAPC modulation/ demodulation, the power of range ambiguities is transferred to the azimuth that is filtered by an optimized Wiener filter in the Doppler domain. The simulation results validate that the MAPC technique can markedly eliminate the range ambiguity of quad-pol SAR systems and extend the unambiguous swaths.
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spelling doaj.art-b676921e6e71447a87b34192475e66502023-12-02T10:54:02ZengChina Science Publishing & Media Ltd. (CSPM)Leida xuebao2095-283X2095-283X2017-08-016442043110.12000/JR17015Range Ambiguity Suppression Approach for Quad-pol SAR Systems Based on Modified Azimuth Phase CodingZhu Xiaojing0Li Fei1Wang Robert2Wang Wei3Sun Xiang4①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(University of Chinese Academy of Sciences, Beijing 100039, China)①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(University of Chinese Academy of Sciences, Beijing 100039, China)①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(University of Chinese Academy of Sciences, Beijing 100039, China)For conventional quadrature-polarimetric (quad-pol) Synthetic Aperture Radar (SAR) systems, as cross-polarized (cross-pol) channels are influenced by the strong co-polarized (co-pol) range ambiguous returns, the range ambiguity levels of cross-polchannels are markedly reduced, which severely restricts the unambiguous swaths. A novel transmission scheme called a hybrid-polarimetric (hybrid-pol) mode is introduced to enhance the range ambiguity levels of cross-pol channels. This scheme improves the performance of cross-pol channels with regards to range ambiguity but deteriorates that of co-pol channels. Therefore, to further enhance the range ambiguity levels of quad-pol SAR systems, the Modified Azimuth Phase Coding (MAPC) technique based on hybrid-pol SAR systems is proposed in this study. By taking advantage of the MAPC modulation/ demodulation, the power of range ambiguities is transferred to the azimuth that is filtered by an optimized Wiener filter in the Doppler domain. The simulation results validate that the MAPC technique can markedly eliminate the range ambiguity of quad-pol SAR systems and extend the unambiguous swaths.http://radars.ie.ac.cn/fileup/HTML/R17015.htmSynthetic Aperture Radar (SAR)Quadrature-polarimetric (quad-pol)Hybrid-polarimetric (hybrid-pol)Range ambiguityModified Azimuth Phase Coding (MAPC)Wiener filter
spellingShingle Zhu Xiaojing
Li Fei
Wang Robert
Wang Wei
Sun Xiang
Range Ambiguity Suppression Approach for Quad-pol SAR Systems Based on Modified Azimuth Phase Coding
Leida xuebao
Synthetic Aperture Radar (SAR)
Quadrature-polarimetric (quad-pol)
Hybrid-polarimetric (hybrid-pol)
Range ambiguity
Modified Azimuth Phase Coding (MAPC)
Wiener filter
title Range Ambiguity Suppression Approach for Quad-pol SAR Systems Based on Modified Azimuth Phase Coding
title_full Range Ambiguity Suppression Approach for Quad-pol SAR Systems Based on Modified Azimuth Phase Coding
title_fullStr Range Ambiguity Suppression Approach for Quad-pol SAR Systems Based on Modified Azimuth Phase Coding
title_full_unstemmed Range Ambiguity Suppression Approach for Quad-pol SAR Systems Based on Modified Azimuth Phase Coding
title_short Range Ambiguity Suppression Approach for Quad-pol SAR Systems Based on Modified Azimuth Phase Coding
title_sort range ambiguity suppression approach for quad pol sar systems based on modified azimuth phase coding
topic Synthetic Aperture Radar (SAR)
Quadrature-polarimetric (quad-pol)
Hybrid-polarimetric (hybrid-pol)
Range ambiguity
Modified Azimuth Phase Coding (MAPC)
Wiener filter
url http://radars.ie.ac.cn/fileup/HTML/R17015.htm
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