Accurate ISAR Scaling for Both Smooth and Maneuvering Targets
Inverse synthetic aperture radar (ISAR) scaling can give the scatterers' absolute coordinate, which is the premise of ascertaining the target's size and recognizing the target. In this paper, we present an accurate ISAR scaling method. First, the signal characteristic in cross-range dimens...
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| Veröffentlicht in: | IEEE transactions on aerospace and electronic systems 2019-06, Vol.55 (3), p.1537-1549 |
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| container_title | IEEE transactions on aerospace and electronic systems |
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| creator | Sibo, Sun Xinyu, Zhang Guangpu, Zhang Guolong, Liang Chunhui, Zhao |
| description | Inverse synthetic aperture radar (ISAR) scaling can give the scatterers' absolute coordinate, which is the premise of ascertaining the target's size and recognizing the target. In this paper, we present an accurate ISAR scaling method. First, the signal characteristic in cross-range dimension is analyzed, and the problem of ascertaining the rotational velocity (RV) is converted to the estimation of the chirp rates. Second, to estimate the chirp rates, the integral Lv's distribution and the ordinary least-squares Lv's distribution are proposed for smooth targets and maneuvering targets, respectively. Utilizing the signal characteristic, the proposed algorithms achieve a higher precision and a lower computational burden compared with existing algorithms. Finally, the weighted ordinary least squares is introduced to calculate the RV from the estimated chirp rates for both smooth and maneuvering targets. Simulation and real data experiment validate the effectiveness of the proposed methods. |
| doi_str_mv | 10.1109/TAES.2019.2895717 |
| format | Article |
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In this paper, we present an accurate ISAR scaling method. First, the signal characteristic in cross-range dimension is analyzed, and the problem of ascertaining the rotational velocity (RV) is converted to the estimation of the chirp rates. Second, to estimate the chirp rates, the integral Lv's distribution and the ordinary least-squares Lv's distribution are proposed for smooth targets and maneuvering targets, respectively. Utilizing the signal characteristic, the proposed algorithms achieve a higher precision and a lower computational burden compared with existing algorithms. Finally, the weighted ordinary least squares is introduced to calculate the RV from the estimated chirp rates for both smooth and maneuvering targets. 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In this paper, we present an accurate ISAR scaling method. First, the signal characteristic in cross-range dimension is analyzed, and the problem of ascertaining the rotational velocity (RV) is converted to the estimation of the chirp rates. Second, to estimate the chirp rates, the integral Lv's distribution and the ordinary least-squares Lv's distribution are proposed for smooth targets and maneuvering targets, respectively. Utilizing the signal characteristic, the proposed algorithms achieve a higher precision and a lower computational burden compared with existing algorithms. Finally, the weighted ordinary least squares is introduced to calculate the RV from the estimated chirp rates for both smooth and maneuvering targets. Simulation and real data experiment validate the effectiveness of the proposed methods.</description><subject>Algorithms</subject><subject>Chirp</subject><subject>Computer simulation</subject><subject>Cross-range scaling</subject><subject>Estimation</subject><subject>Frequency-domain analysis</subject><subject>Image resolution</subject><subject>Inverse synthetic aperture radar</subject><subject>inverse synthetic aperture radar (ISAR)</subject><subject>Least squares</subject><subject>Lv's distribution (LVD)</subject><subject>Maneuvering targets</subject><subject>Radar imaging</subject><subject>Regression analysis</subject><subject>Rotation</subject><subject>Scaling</subject><subject>Signal resolution</subject><subject>Sun</subject><issn>0018-9251</issn><issn>1557-9603</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kF1LwzAUhoMoOKc_QLwpeN16kjRfF17UMXUwEey8Dkmazo2tnUkr-O9t2fDq5XCe9xx4ELrFkGEM6mFVzMuMAFYZkYoJLM7QBDMmUsWBnqMJAJapIgxfoqsYt8OYy5xO0GPhXB9M55NFWXwkpTO7TbNO6jYkT233lZT7dgzTVMmbaXz_48O4X5mw9l28Rhe12UV_c8op-nyer2av6fL9ZTErlqkjinapoobUlFlBHJDKKQvOEFOxijOQlmDmwOXWGksFtdIqS5RVFQCnOfa84nSK7o93D6H97n3s9LbtQzO81IRQwdVQFAOFj5QLbYzB1_oQNnsTfjUGPVrSoyU9WtInS0Pn7tjZeO__eclzonJJ_wBQtWHQ</recordid><startdate>20190601</startdate><enddate>20190601</enddate><creator>Sibo, Sun</creator><creator>Xinyu, Zhang</creator><creator>Guangpu, Zhang</creator><creator>Guolong, Liang</creator><creator>Chunhui, Zhao</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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In this paper, we present an accurate ISAR scaling method. First, the signal characteristic in cross-range dimension is analyzed, and the problem of ascertaining the rotational velocity (RV) is converted to the estimation of the chirp rates. Second, to estimate the chirp rates, the integral Lv's distribution and the ordinary least-squares Lv's distribution are proposed for smooth targets and maneuvering targets, respectively. Utilizing the signal characteristic, the proposed algorithms achieve a higher precision and a lower computational burden compared with existing algorithms. Finally, the weighted ordinary least squares is introduced to calculate the RV from the estimated chirp rates for both smooth and maneuvering targets. Simulation and real data experiment validate the effectiveness of the proposed methods.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TAES.2019.2895717</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0002-2728-4934</orcidid><orcidid>https://orcid.org/0000-0002-7176-9226</orcidid></addata></record> |
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| source | IEEE Electronic Library (IEL) |
| subjects | Algorithms Chirp Computer simulation Cross-range scaling Estimation Frequency-domain analysis Image resolution Inverse synthetic aperture radar inverse synthetic aperture radar (ISAR) Least squares Lv's distribution (LVD) Maneuvering targets Radar imaging Regression analysis Rotation Scaling Signal resolution Sun |
| title | Accurate ISAR Scaling for Both Smooth and Maneuvering Targets |
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