Multiresolution FDA-SAR Imaging Method Based on Sub-band Shifting
In this paper, a Frequency Diverse Array (FDA)-based Synthetic-Aperture Radar (FDA-SAR) imaging method based on sub-band shifting and splicing is proposed to address the conflicting issues associated with multi-mode SAR imaging in parameter design, such as those related to resolution and imaging swa...
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| Format: | Article |
| Language: | English |
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China Science Publishing & Media Ltd. (CSPM)
2025-06-01
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| Series: | Leida xuebao |
| Subjects: | |
| Online Access: | https://radars.ac.cn/cn/article/doi/10.12000/JR25006 |
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| author | Keyi WANG Jingwei XU Guisheng LIAO Weiwei WANG |
| author_facet | Keyi WANG Jingwei XU Guisheng LIAO Weiwei WANG |
| author_sort | Keyi WANG |
| collection | DOAJ |
| description | In this paper, a Frequency Diverse Array (FDA)-based Synthetic-Aperture Radar (FDA-SAR) imaging method based on sub-band shifting and splicing is proposed to address the conflicting issues associated with multi-mode SAR imaging in parameter design, such as those related to resolution and imaging swath. Using the multiple-sub-band concurrent mode of a FDA radar, a radar waveform with an adjustable bandwidth is designed. The time-frequency-domain expressions of the synthesized signals with arbitrary bandwidths are derived in detail, enabling compensation for the involved azimuth-time-delay differences and inconsistent frequency bands. The effect of the spectrum distribution of the synthesized signals on the imaging performance is analyzed, and spectrum synthesis based on non-uniform sub-band shifting is adopted, which reduces the peak sidelobe level and improves the imaging performance. Finally, simulations verify the effectiveness of the proposed method to simultaneously achieve signal-level fusion processing for coarse-resolution imaging of large observation scenes and fine-resolution imaging of key areas. |
| format | Article |
| id | doaj-art-c0bc217ff2f24a79be626b467ae0b0b3 |
| institution | Kabale University |
| issn | 2095-283X |
| language | English |
| publishDate | 2025-06-01 |
| publisher | China Science Publishing & Media Ltd. (CSPM) |
| record_format | Article |
| series | Leida xuebao |
| spelling | doaj-art-c0bc217ff2f24a79be626b467ae0b0b32025-08-20T03:30:49ZengChina Science Publishing & Media Ltd. (CSPM)Leida xuebao2095-283X2025-06-0114369771110.12000/JR25006R25006Multiresolution FDA-SAR Imaging Method Based on Sub-band ShiftingKeyi WANG0Jingwei XU1Guisheng LIAO2Weiwei WANG3National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, ChinaNational Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, ChinaNational Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, ChinaChina Academy of Space Technology (Xi’an), Xi’an 710100, ChinaIn this paper, a Frequency Diverse Array (FDA)-based Synthetic-Aperture Radar (FDA-SAR) imaging method based on sub-band shifting and splicing is proposed to address the conflicting issues associated with multi-mode SAR imaging in parameter design, such as those related to resolution and imaging swath. Using the multiple-sub-band concurrent mode of a FDA radar, a radar waveform with an adjustable bandwidth is designed. The time-frequency-domain expressions of the synthesized signals with arbitrary bandwidths are derived in detail, enabling compensation for the involved azimuth-time-delay differences and inconsistent frequency bands. The effect of the spectrum distribution of the synthesized signals on the imaging performance is analyzed, and spectrum synthesis based on non-uniform sub-band shifting is adopted, which reduces the peak sidelobe level and improves the imaging performance. Finally, simulations verify the effectiveness of the proposed method to simultaneously achieve signal-level fusion processing for coarse-resolution imaging of large observation scenes and fine-resolution imaging of key areas.https://radars.ac.cn/cn/article/doi/10.12000/JR25006frequency diverse array (fda)sub-band shiftingfrequency band regulationmultiresolution sar imagingnonuniform sub-band |
| spellingShingle | Keyi WANG Jingwei XU Guisheng LIAO Weiwei WANG Multiresolution FDA-SAR Imaging Method Based on Sub-band Shifting Leida xuebao frequency diverse array (fda) sub-band shifting frequency band regulation multiresolution sar imaging nonuniform sub-band |
| title | Multiresolution FDA-SAR Imaging Method Based on Sub-band Shifting |
| title_full | Multiresolution FDA-SAR Imaging Method Based on Sub-band Shifting |
| title_fullStr | Multiresolution FDA-SAR Imaging Method Based on Sub-band Shifting |
| title_full_unstemmed | Multiresolution FDA-SAR Imaging Method Based on Sub-band Shifting |
| title_short | Multiresolution FDA-SAR Imaging Method Based on Sub-band Shifting |
| title_sort | multiresolution fda sar imaging method based on sub band shifting |
| topic | frequency diverse array (fda) sub-band shifting frequency band regulation multiresolution sar imaging nonuniform sub-band |
| url | https://radars.ac.cn/cn/article/doi/10.12000/JR25006 |
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