Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath Imaging
A spaceborne azimuth multichannel synthetic aperture radar (SAR) system can effectively realize high resolution wide swath (HRWS) imaging. However, the performance of this system is restricted by its two inherent defects. Firstly, non-uniform sampling is generated if the pulse repetition frequency (...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-10-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/19/19/4277 |
| _version_ | 1811299617259651072 |
|---|---|
| author | Wei Xu Jialuo Hu Pingping Huang Weixian Tan Yifan Dong |
| author_facet | Wei Xu Jialuo Hu Pingping Huang Weixian Tan Yifan Dong |
| author_sort | Wei Xu |
| collection | DOAJ |
| description | A spaceborne azimuth multichannel synthetic aperture radar (SAR) system can effectively realize high resolution wide swath (HRWS) imaging. However, the performance of this system is restricted by its two inherent defects. Firstly, non-uniform sampling is generated if the pulse repetition frequency (PRF) deviates from the optimum value. Secondly, multichannel systems are very sensitive to channel errors, which are difficult to completely eliminate. In this paper, we propose a novel receive antenna architecture with an azimuth phase center adaptive adjustment which adjusts the phase center position of each sub-aperture to improve multichannel SAR system performance. On one hand, the optimum value of the PRF can be adaptively adjusted within a certain range by adjusting receiving phase centers to obtain uniform azimuth sampling. On the other hand, false targets introduced by residual channel errors after azimuth multichannel error compensation can be further suppressed. The effectiveness of the proposed method to compensate for non-uniform sampling and suppress false targets is verified by simulation experiments. |
| first_indexed | 2024-04-13T06:38:24Z |
| format | Article |
| id | doaj.art-71edd1ee2122484892bf21a30036acfe |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T06:38:24Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-71edd1ee2122484892bf21a30036acfe2022-12-22T02:57:49ZengMDPI AGSensors1424-82202019-10-011919427710.3390/s19194277s19194277Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath ImagingWei Xu0Jialuo Hu1Pingping Huang2Weixian Tan3Yifan Dong4College of Information Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaA spaceborne azimuth multichannel synthetic aperture radar (SAR) system can effectively realize high resolution wide swath (HRWS) imaging. However, the performance of this system is restricted by its two inherent defects. Firstly, non-uniform sampling is generated if the pulse repetition frequency (PRF) deviates from the optimum value. Secondly, multichannel systems are very sensitive to channel errors, which are difficult to completely eliminate. In this paper, we propose a novel receive antenna architecture with an azimuth phase center adaptive adjustment which adjusts the phase center position of each sub-aperture to improve multichannel SAR system performance. On one hand, the optimum value of the PRF can be adaptively adjusted within a certain range by adjusting receiving phase centers to obtain uniform azimuth sampling. On the other hand, false targets introduced by residual channel errors after azimuth multichannel error compensation can be further suppressed. The effectiveness of the proposed method to compensate for non-uniform sampling and suppress false targets is verified by simulation experiments.https://www.mdpi.com/1424-8220/19/19/4277synthetic aperture radar (sar)high resolution wide swath (hrws)azimuth multichannel reconstructionphase center adaptationfalse targets suppression |
| spellingShingle | Wei Xu Jialuo Hu Pingping Huang Weixian Tan Yifan Dong Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath Imaging Sensors synthetic aperture radar (sar) high resolution wide swath (hrws) azimuth multichannel reconstruction phase center adaptation false targets suppression |
| title | Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath Imaging |
| title_full | Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath Imaging |
| title_fullStr | Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath Imaging |
| title_full_unstemmed | Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath Imaging |
| title_short | Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath Imaging |
| title_sort | azimuth phase center adaptive adjustment upon reception for high resolution wide swath imaging |
| topic | synthetic aperture radar (sar) high resolution wide swath (hrws) azimuth multichannel reconstruction phase center adaptation false targets suppression |
| url | https://www.mdpi.com/1424-8220/19/19/4277 |
| work_keys_str_mv | AT weixu azimuthphasecenteradaptiveadjustmentuponreceptionforhighresolutionwideswathimaging AT jialuohu azimuthphasecenteradaptiveadjustmentuponreceptionforhighresolutionwideswathimaging AT pingpinghuang azimuthphasecenteradaptiveadjustmentuponreceptionforhighresolutionwideswathimaging AT weixiantan azimuthphasecenteradaptiveadjustmentuponreceptionforhighresolutionwideswathimaging AT yifandong azimuthphasecenteradaptiveadjustmentuponreceptionforhighresolutionwideswathimaging |