{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:27:16Z","timestamp":1760149636932,"version":"build-2065373602"},"reference-count":30,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2023,8,28]],"date-time":"2023-08-28T00:00:00Z","timestamp":1693180800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61971224","62001227","62001232"],"award-info":[{"award-number":["61971224","62001227","62001232"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>In order to enhance the detection and parameter estimation capacity to the maneuvering target with complex motions, a low complexity coherent integration and parameter estimation method named SOKT-IAR-LVD is proposed in this paper. In SOKT-IAR-LVD, first, the second-order keystone transform (SOKT) is utilized to eliminate the range curvature induced by target acceleration. Second, improved axis rotation (IAR) is applied to regulate the linear range migration by rotating the fast time axis and the target envelope is aligned along the slow time axis with a quadratic phase characteristic. At last, the target signal is coherently integrated via the Lv\u2019s Distribution (LVD) transform. The target motion parameters, including range, velocity, and acceleration, are estimated by the IAR and LVD results. The integration gain and computational load of SOKT-IAR-LVD are analyzed. Without needing to estimate the Doppler ambiguity number and target acceleration, the computational burden of SOKT-IAR-LVD is three orders of magnitude lower than that of the Radon-Lv\u2019s Distribution (RLVD) method. Simulation results demonstrate that the detection performance of SOKT-IAR-LVD is almost the same as that of RLVD and that the required input SNR of SOKT-IAR-LVD is 17.4 dB lower than that of SOKT\u2013Radon Fourier transform (SOKT-RFT) when the detection threshold is set to 12 dB.<\/jats:p>","DOI":"10.3390\/rs15174227","type":"journal-article","created":{"date-parts":[[2023,8,29]],"date-time":"2023-08-29T08:51:14Z","timestamp":1693299074000},"page":"4227","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Coherent Integration and Parameter Estimation Method for Constant Radial Acceleration Weak Target via SOKT-IAR-LVD"],"prefix":"10.3390","volume":"15","author":[{"given":"Renli","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China"}]},{"given":"Nan","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,8,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"12097","DOI":"10.1109\/ACCESS.2019.2892505","article-title":"Ground-Based Radar Detection for High-Speed Maneuvering Target via Fast Discrete Chirp-Fourier Transform","volume":"7","author":"Huang","year":"2019","journal-title":"IEEE Access"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"378","DOI":"10.1049\/iet-spr.2016.0444","article-title":"Detection and RM correction approach for manoeuvring target with complex motions","volume":"11","author":"Li","year":"2017","journal-title":"IET Signal Process."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"221","DOI":"10.1016\/j.sigpro.2019.04.027","article-title":"High-order RM and DFM correction method for long-time coherent integration of highly maneuvering target","volume":"162","author":"Fang","year":"2019","journal-title":"Signal Process."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1013","DOI":"10.1049\/iet-rsn.2014.0567","article-title":"Fast moving target imaging and motion parameters estimation based on Radon transform and bi-directional approach","volume":"10","author":"Hou","year":"2016","journal-title":"IET Radar Sonar Navig."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"152","DOI":"10.1016\/j.dsp.2018.05.004","article-title":"Fast non-searching method for ground moving target refocusing and motion parameters estimation","volume":"79","author":"He","year":"2018","journal-title":"Digit. 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