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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China Science Publishing & Media Ltd. (CSPM)
2017-08-01
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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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id | doaj.art-b676921e6e71447a87b34192475e6650 |
institution | Directory Open Access Journal |
issn | 2095-283X 2095-283X |
language | English |
last_indexed | 2024-03-09T09:03:26Z |
publishDate | 2017-08-01 |
publisher | China Science Publishing & Media Ltd. (CSPM) |
record_format | Article |
series | Leida xuebao |
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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