Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Aided by Digital Elevation Model
In multichannel Synthetic Aperture Radar (SAR) data processing, the phase and amplitude characteristics of all channels should be well calibrated before multichannel data reconstruction; otherwise, the imaging result will be degraded and suffer from ghost targets. The yaw and pitch of the SAR platfo...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
China Science Publishing & Media Ltd. (CSPM)
2019-10-01
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| Series: | Leida xuebao |
| Subjects: | |
| Online Access: | http://radars.ie.ac.cn/article/doi/10.12000/JR19009?viewType=HTML |
| _version_ | 1797426995341033472 |
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| author | LI Qiang FAN Huaitao |
| author_facet | LI Qiang FAN Huaitao |
| author_sort | LI Qiang |
| collection | DOAJ |
| description | In multichannel Synthetic Aperture Radar (SAR) data processing, the phase and amplitude characteristics of all channels should be well calibrated before multichannel data reconstruction; otherwise, the imaging result will be degraded and suffer from ghost targets. The yaw and pitch of the SAR platform, which change in azimuth and range, respectively, will cause phase mismatch among different channels. The currently developed attitude-aided phase mismatch calibration method does not consider the topographic relief. On the basis of the external Digital Elevation Model (DEM) and attitude information, a new phase mismatch calibration method is proposed in this study. The proposed method performs better than other methods in mountainous areas. A simulation experiment and the corresponding quantitative assessment are conducted. Then, the newly proposed method is applied to airborne multichannel SAR experimental data for further verification. |
| first_indexed | 2024-03-09T08:37:54Z |
| format | Article |
| id | doaj.art-6ad741781ffc458b97519d5e3a0217de |
| institution | Directory Open Access Journal |
| issn | 2095-283X 2095-283X |
| language | English |
| last_indexed | 2024-03-09T08:37:54Z |
| publishDate | 2019-10-01 |
| publisher | China Science Publishing & Media Ltd. (CSPM) |
| record_format | Article |
| series | Leida xuebao |
| spelling | doaj.art-6ad741781ffc458b97519d5e3a0217de2023-12-02T17:45:25ZengChina Science Publishing & Media Ltd. (CSPM)Leida xuebao2095-283X2095-283X2019-10-018561662310.12000/JR19009Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Aided by Digital Elevation ModelLI Qiang0FAN Huaitao1①(Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China)②(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)In multichannel Synthetic Aperture Radar (SAR) data processing, the phase and amplitude characteristics of all channels should be well calibrated before multichannel data reconstruction; otherwise, the imaging result will be degraded and suffer from ghost targets. The yaw and pitch of the SAR platform, which change in azimuth and range, respectively, will cause phase mismatch among different channels. The currently developed attitude-aided phase mismatch calibration method does not consider the topographic relief. On the basis of the external Digital Elevation Model (DEM) and attitude information, a new phase mismatch calibration method is proposed in this study. The proposed method performs better than other methods in mountainous areas. A simulation experiment and the corresponding quantitative assessment are conducted. Then, the newly proposed method is applied to airborne multichannel SAR experimental data for further verification.http://radars.ie.ac.cn/article/doi/10.12000/JR19009?viewType=HTMLsynthetic aperture radar (sar)high-resolution and wide-swath (hrws) imagingmultichannel in azimuthdigital elevation model (dem)channel mismatch calibration |
| spellingShingle | LI Qiang FAN Huaitao Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Aided by Digital Elevation Model Leida xuebao synthetic aperture radar (sar) high-resolution and wide-swath (hrws) imaging multichannel in azimuth digital elevation model (dem) channel mismatch calibration |
| title | Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Aided by Digital Elevation Model |
| title_full | Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Aided by Digital Elevation Model |
| title_fullStr | Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Aided by Digital Elevation Model |
| title_full_unstemmed | Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Aided by Digital Elevation Model |
| title_short | Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Aided by Digital Elevation Model |
| title_sort | channel phase mismatch calibration for multichannel in azimuth sar imaging aided by digital elevation model |
| topic | synthetic aperture radar (sar) high-resolution and wide-swath (hrws) imaging multichannel in azimuth digital elevation model (dem) channel mismatch calibration |
| url | http://radars.ie.ac.cn/article/doi/10.12000/JR19009?viewType=HTML |
| work_keys_str_mv | AT liqiang channelphasemismatchcalibrationformultichannelinazimuthsarimagingaidedbydigitalelevationmodel AT fanhuaitao channelphasemismatchcalibrationformultichannelinazimuthsarimagingaidedbydigitalelevationmodel |