Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase Coding
The intra-pulse spotlight imaging mode can effectively overcome the contradiction between high resolution and wide swath in spaceborne Synthetic Aperture Radar (SAR), and considers the echo’s signal-tonoise ratio. However, signal division by spatial filtering along the range direction may be impacte...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
China Science Publishing & Media Ltd. (CSPM)
2018-08-01
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| Series: | Leida xuebao |
| Subjects: | |
| Online Access: | http://radars.ie.ac.cn/fileup/HTML/R17114.htm |
| _version_ | 1797426968150409216 |
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| author | Wu Yufeng Ye Shaohua Feng Dazheng |
| author_facet | Wu Yufeng Ye Shaohua Feng Dazheng |
| author_sort | Wu Yufeng |
| collection | DOAJ |
| description | The intra-pulse spotlight imaging mode can effectively overcome the contradiction between high resolution and wide swath in spaceborne Synthetic Aperture Radar (SAR), and considers the echo’s signal-tonoise ratio. However, signal division by spatial filtering along the range direction may be impacted by fluctuating terrain. To solve this problem, a novel intra-pulse spotlight imaging method based on Azimuth Phase Coding (APC) is proposed in this paper. Using APC, the azimuth spectrum of echo data from different sub-pulses will locate in different Pulse Repetition Frequencies (PRF). As such, the signal can be divided using an azimuth adaptive beamforming technique. The signal separation method and selection of the shift factor are discussed in detail. Finally, simulation results demonstrate the effectiveness of the proposed method. |
| first_indexed | 2024-03-09T08:37:31Z |
| format | Article |
| id | doaj.art-0baf9788dbe645008c35dbad52bcc4e7 |
| institution | Directory Open Access Journal |
| issn | 2095-283X 2095-283X |
| language | English |
| last_indexed | 2024-03-09T08:37:31Z |
| publishDate | 2018-08-01 |
| publisher | China Science Publishing & Media Ltd. (CSPM) |
| record_format | Article |
| series | Leida xuebao |
| spelling | doaj.art-0baf9788dbe645008c35dbad52bcc4e72023-12-02T17:45:37ZengChina Science Publishing & Media Ltd. (CSPM)Leida xuebao2095-283X2095-283X2018-08-017443744510.12000/JR17114Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase CodingWu Yufeng0Ye Shaohua1Feng Dazheng2①(AVIC Leihua Electronic Technology Research Institute, Wuxi 214063, China)①(AVIC Leihua Electronic Technology Research Institute, Wuxi 214063, China)②(National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China)The intra-pulse spotlight imaging mode can effectively overcome the contradiction between high resolution and wide swath in spaceborne Synthetic Aperture Radar (SAR), and considers the echo’s signal-tonoise ratio. However, signal division by spatial filtering along the range direction may be impacted by fluctuating terrain. To solve this problem, a novel intra-pulse spotlight imaging method based on Azimuth Phase Coding (APC) is proposed in this paper. Using APC, the azimuth spectrum of echo data from different sub-pulses will locate in different Pulse Repetition Frequencies (PRF). As such, the signal can be divided using an azimuth adaptive beamforming technique. The signal separation method and selection of the shift factor are discussed in detail. Finally, simulation results demonstrate the effectiveness of the proposed method.http://radars.ie.ac.cn/fileup/HTML/R17114.htmSynthetic Aperture Radar (SAR)Intra-pulse spotlight modeAzimuth Phase Coding (APC)Azimuth multi-channelSignal division |
| spellingShingle | Wu Yufeng Ye Shaohua Feng Dazheng Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase Coding Leida xuebao Synthetic Aperture Radar (SAR) Intra-pulse spotlight mode Azimuth Phase Coding (APC) Azimuth multi-channel Signal division |
| title | Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase Coding |
| title_full | Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase Coding |
| title_fullStr | Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase Coding |
| title_full_unstemmed | Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase Coding |
| title_short | Intra-pulse Spotlight SAR Imaging Method Based on Azimuth Phase Coding |
| title_sort | intra pulse spotlight sar imaging method based on azimuth phase coding |
| topic | Synthetic Aperture Radar (SAR) Intra-pulse spotlight mode Azimuth Phase Coding (APC) Azimuth multi-channel Signal division |
| url | http://radars.ie.ac.cn/fileup/HTML/R17114.htm |
| work_keys_str_mv | AT wuyufeng intrapulsespotlightsarimagingmethodbasedonazimuthphasecoding AT yeshaohua intrapulsespotlightsarimagingmethodbasedonazimuthphasecoding AT fengdazheng intrapulsespotlightsarimagingmethodbasedonazimuthphasecoding |