A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decomposition
Range-azimuth imaging of ground targets via frequency-modulated continuous wave (FMCW) radar is crucial for effective target detection. However, when the pitch of the moving array constructed during motion exceeds the physical array aperture, azimuth ambiguity occurs, making range-azimuth imaging on...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-08-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914725001035 |
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| _version_ | 1849770478096351232 |
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| author | Yanwen Han Xiaopeng Yan Jiawei Wang Sheng Zheng Hongrui Yu Jian Dai |
| author_facet | Yanwen Han Xiaopeng Yan Jiawei Wang Sheng Zheng Hongrui Yu Jian Dai |
| author_sort | Yanwen Han |
| collection | DOAJ |
| description | Range-azimuth imaging of ground targets via frequency-modulated continuous wave (FMCW) radar is crucial for effective target detection. However, when the pitch of the moving array constructed during motion exceeds the physical array aperture, azimuth ambiguity occurs, making range-azimuth imaging on a moving platform challenging. To address this issue, we theoretically analyze azimuth ambiguity generation in sparse motion arrays and propose a dual-aperture adaptive processing (DAAP) method for suppressing azimuth ambiguity. This method combines spatial multiple-input multiple-output (MIMO) arrays with sparse motion arrays to achieve high-resolution range-azimuth imaging. In addition, an adaptive QR decomposition denoising method for sparse array signals based on iterative low-rank matrix approximation (LRMA) and regularized QR is proposed to preprocess sparse motion array signals. Simulations and experiments show that on a two-transmitter-four-receiver array, the signal-to-noise ratio (SNR) of the sparse motion array signal after noise suppression via adaptive QR decomposition can exceed 0 dB, and the azimuth ambiguity signal ratio (AASR) can be reduced to below −20 dB. |
| format | Article |
| id | doaj-art-2ef044edcbd7484f9c7ebdfc8e676cc5 |
| institution | DOAJ |
| issn | 2214-9147 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj-art-2ef044edcbd7484f9c7ebdfc8e676cc52025-08-20T03:02:59ZengKeAi Communications Co., Ltd.Defence Technology2214-91472025-08-015025427110.1016/j.dt.2025.03.019A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decompositionYanwen Han0Xiaopeng Yan1Jiawei Wang2Sheng Zheng3Hongrui Yu4Jian Dai5Science and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaCorresponding author.; Science and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaScience and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaScience and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaScience and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaCorresponding author.; Science and Technology on Electromechanical Dynamic Control Laboratory, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaRange-azimuth imaging of ground targets via frequency-modulated continuous wave (FMCW) radar is crucial for effective target detection. However, when the pitch of the moving array constructed during motion exceeds the physical array aperture, azimuth ambiguity occurs, making range-azimuth imaging on a moving platform challenging. To address this issue, we theoretically analyze azimuth ambiguity generation in sparse motion arrays and propose a dual-aperture adaptive processing (DAAP) method for suppressing azimuth ambiguity. This method combines spatial multiple-input multiple-output (MIMO) arrays with sparse motion arrays to achieve high-resolution range-azimuth imaging. In addition, an adaptive QR decomposition denoising method for sparse array signals based on iterative low-rank matrix approximation (LRMA) and regularized QR is proposed to preprocess sparse motion array signals. Simulations and experiments show that on a two-transmitter-four-receiver array, the signal-to-noise ratio (SNR) of the sparse motion array signal after noise suppression via adaptive QR decomposition can exceed 0 dB, and the azimuth ambiguity signal ratio (AASR) can be reduced to below −20 dB.http://www.sciencedirect.com/science/article/pii/S2214914725001035Frequency modulated continuous wave (FMCW)Sparse motion arrayRange-azimuth imagingAzimuth ambiguity suppressionDAAPAdaptive QR decomposition |
| spellingShingle | Yanwen Han Xiaopeng Yan Jiawei Wang Sheng Zheng Hongrui Yu Jian Dai A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decomposition Defence Technology Frequency modulated continuous wave (FMCW) Sparse motion array Range-azimuth imaging Azimuth ambiguity suppression DAAP Adaptive QR decomposition |
| title | A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decomposition |
| title_full | A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decomposition |
| title_fullStr | A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decomposition |
| title_full_unstemmed | A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decomposition |
| title_short | A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decomposition |
| title_sort | sparse moving array imaging approach for fmcw radar with dual aperture adaptive azimuth ambiguity suppression and adaptive qr decomposition |
| topic | Frequency modulated continuous wave (FMCW) Sparse motion array Range-azimuth imaging Azimuth ambiguity suppression DAAP Adaptive QR decomposition |
| url | http://www.sciencedirect.com/science/article/pii/S2214914725001035 |
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