Robust SAR Waveform Design for Extended Target in Spectrally Dense Environments
To enhance the signature of an extended target in a SAR image, a robust waveform design method is presented for spectrally dense environments. First, the problem is formulated by maximizing the worst-case signal-to-clutter ratio (SCR) over the uncertainty set of statistics for both target and backgr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/25/12/3670 |
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| author | Rui Zhang Fuwei Wu Bing Gao Ge Xu Jianwei Wu Jiawei Zhang |
| author_facet | Rui Zhang Fuwei Wu Bing Gao Ge Xu Jianwei Wu Jiawei Zhang |
| author_sort | Rui Zhang |
| collection | DOAJ |
| description | To enhance the signature of an extended target in a SAR image, a robust waveform design method is presented for spectrally dense environments. First, the problem is formulated by maximizing the worst-case signal-to-clutter ratio (SCR) over the uncertainty set of statistics for both target and background scattering characteristics, subject to energy, similarity, and spectrum constraints. Second, the closed-form solutions for the uncertain statistics are derived. The problem of maximizing worst-case SCR is boiled down to a nonconvex fractional quadratically constrained quadratic problem (QCQP). Resorting to the Dinkelbach’s algorithm and Lagrange duality, the QCQP is split into a series of solvable semidefinite programming problems. A convergence analysis is conducted, where a sufficient condition for global convergence is derived. Finally, numerical examples are presented to demonstrate the performance of the proposed scheme. |
| format | Article |
| id | doaj-art-509fca97566b470b9ae20b40ca7c5a26 |
| institution | DOAJ |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-509fca97566b470b9ae20b40ca7c5a262025-08-20T03:16:35ZengMDPI AGSensors1424-82202025-06-012512367010.3390/s25123670Robust SAR Waveform Design for Extended Target in Spectrally Dense EnvironmentsRui Zhang0Fuwei Wu1Bing Gao2Ge Xu3Jianwei Wu4Jiawei Zhang5Nanjing Research Institute of Electronics Technology, Nanjing 210039, ChinaNanjing Research Institute of Electronics Technology, Nanjing 210039, ChinaNanjing Research Institute of Electronics Technology, Nanjing 210039, ChinaNanjing Research Institute of Electronics Technology, Nanjing 210039, ChinaSchool of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, ChinaSchool of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, ChinaTo enhance the signature of an extended target in a SAR image, a robust waveform design method is presented for spectrally dense environments. First, the problem is formulated by maximizing the worst-case signal-to-clutter ratio (SCR) over the uncertainty set of statistics for both target and background scattering characteristics, subject to energy, similarity, and spectrum constraints. Second, the closed-form solutions for the uncertain statistics are derived. The problem of maximizing worst-case SCR is boiled down to a nonconvex fractional quadratically constrained quadratic problem (QCQP). Resorting to the Dinkelbach’s algorithm and Lagrange duality, the QCQP is split into a series of solvable semidefinite programming problems. A convergence analysis is conducted, where a sufficient condition for global convergence is derived. Finally, numerical examples are presented to demonstrate the performance of the proposed scheme.https://www.mdpi.com/1424-8220/25/12/3670SARSCRextended targetsrobust waveformspectral constraint |
| spellingShingle | Rui Zhang Fuwei Wu Bing Gao Ge Xu Jianwei Wu Jiawei Zhang Robust SAR Waveform Design for Extended Target in Spectrally Dense Environments Sensors SAR SCR extended targets robust waveform spectral constraint |
| title | Robust SAR Waveform Design for Extended Target in Spectrally Dense Environments |
| title_full | Robust SAR Waveform Design for Extended Target in Spectrally Dense Environments |
| title_fullStr | Robust SAR Waveform Design for Extended Target in Spectrally Dense Environments |
| title_full_unstemmed | Robust SAR Waveform Design for Extended Target in Spectrally Dense Environments |
| title_short | Robust SAR Waveform Design for Extended Target in Spectrally Dense Environments |
| title_sort | robust sar waveform design for extended target in spectrally dense environments |
| topic | SAR SCR extended targets robust waveform spectral constraint |
| url | https://www.mdpi.com/1424-8220/25/12/3670 |
| work_keys_str_mv | AT ruizhang robustsarwaveformdesignforextendedtargetinspectrallydenseenvironments AT fuweiwu robustsarwaveformdesignforextendedtargetinspectrallydenseenvironments AT binggao robustsarwaveformdesignforextendedtargetinspectrallydenseenvironments AT gexu robustsarwaveformdesignforextendedtargetinspectrallydenseenvironments AT jianweiwu robustsarwaveformdesignforextendedtargetinspectrallydenseenvironments AT jiaweizhang robustsarwaveformdesignforextendedtargetinspectrallydenseenvironments |