Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps
To simultaneously achieve two-dimensional high resolution and wide swath in synthetic aperture radar (SAR), azimuth MIMO structure combined with stepped-frequency chirp signals was developed via splitting the antenna into N subapertures. During transmitting each subaperture transmits a chirp pulse a...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2014/161294 |
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| _version_ | 1832560563276742656 |
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| author | Xiulian Luo Yunkai Deng Robert Wang Lei Guo Mingjiang Wang |
| author_facet | Xiulian Luo Yunkai Deng Robert Wang Lei Guo Mingjiang Wang |
| author_sort | Xiulian Luo |
| collection | DOAJ |
| description | To simultaneously achieve two-dimensional high resolution and wide swath in synthetic aperture radar (SAR), azimuth MIMO structure combined with stepped-frequency chirp signals was developed via splitting the antenna into N subapertures. During transmitting each subaperture transmits a chirp pulse at a different carrier frequency, while during receiving every subaperture receives the N scattered pulses at the same time. Separating the N scattered pulses received by each subaperture and downlinking them to the ground yield N2 different signal paths. Due to the dedicated network in the SAR system, the channel imbalance is inevitable. To correct the channel imbalance, this paper presents an external calibration method, where the channel characteristics are estimated from the peak value of a strong point target for each channel. Simulation and real raw data experiments are performed to validate the proposed method. |
| format | Article |
| id | doaj-art-e80df614baf04e2798971a6107122870 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-e80df614baf04e2798971a61071228702025-02-03T01:27:17ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772014-01-01201410.1155/2014/161294161294Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency ChirpsXiulian Luo0Yunkai Deng1Robert Wang2Lei Guo3Mingjiang Wang4Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electronics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electronics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electronics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electronics, Chinese Academy of Sciences, Beijing 100190, ChinaTo simultaneously achieve two-dimensional high resolution and wide swath in synthetic aperture radar (SAR), azimuth MIMO structure combined with stepped-frequency chirp signals was developed via splitting the antenna into N subapertures. During transmitting each subaperture transmits a chirp pulse at a different carrier frequency, while during receiving every subaperture receives the N scattered pulses at the same time. Separating the N scattered pulses received by each subaperture and downlinking them to the ground yield N2 different signal paths. Due to the dedicated network in the SAR system, the channel imbalance is inevitable. To correct the channel imbalance, this paper presents an external calibration method, where the channel characteristics are estimated from the peak value of a strong point target for each channel. Simulation and real raw data experiments are performed to validate the proposed method.http://dx.doi.org/10.1155/2014/161294 |
| spellingShingle | Xiulian Luo Yunkai Deng Robert Wang Lei Guo Mingjiang Wang Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps International Journal of Antennas and Propagation |
| title | Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps |
| title_full | Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps |
| title_fullStr | Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps |
| title_full_unstemmed | Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps |
| title_short | Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps |
| title_sort | correction of channel imbalance for mimo sar using stepped frequency chirps |
| url | http://dx.doi.org/10.1155/2014/161294 |
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