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Array sparse optimization reduces the hardware cost of MIMO radar, while virtual aperture and the equivalent phase center (EPC) principle simplify the radar signal model and reduce the computation and complexity of imaging algorithms. However, the application of sparse array structure and the EPC principle produces a non-negligible phase error, which affects the imaging quality. This paper simplifies the MIMO radar signal model based on the phase center approximation, analyzes the phase error generated by this method, and proposes an improved phase error correction method to solve the problem that the target cannot be well-focused at non-reference distance during imaging. In addition, this paper designs a sparse linear MIMO array with a periodic structure, which reduces the number of transmitting and receiving units, system complexity, and hardware costs. The proposed phase correction method was combined with the wavenumber domain algorithm to simulate and experiment on the designed antenna array, and good experimental results were obtained to verify the effectiveness of the proposed method.<\/jats:p>","DOI":"10.3390\/rs16193685","type":"journal-article","created":{"date-parts":[[2024,10,2]],"date-time":"2024-10-02T11:29:24Z","timestamp":1727868564000},"page":"3685","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Phase Error Correction in Sparse Linear MIMO Radar Based on the Equivalent Phase Center Principle"],"prefix":"10.3390","volume":"16","author":[{"given":"Wenyuan","family":"Shao","sequence":"first","affiliation":[{"name":"Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China"},{"name":"Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China"},{"name":"School of Electronic, Electrical, and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Jianmin","family":"Hu","sequence":"additional","affiliation":[{"name":"Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China"},{"name":"GBA Branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510530, China"},{"name":"Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou 510530, China"}]},{"given":"Yicai","family":"Ji","sequence":"additional","affiliation":[{"name":"Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China"},{"name":"Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China"},{"name":"School of Electronic, Electrical, and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Jun","family":"Pan","sequence":"additional","affiliation":[{"name":"GBA Branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510530, China"},{"name":"Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou 510530, China"}]},{"given":"Guangyou","family":"Fang","sequence":"additional","affiliation":[{"name":"Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China"},{"name":"Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China"},{"name":"GBA Branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510530, China"},{"name":"Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou 510530, China"}]}],"member":"1968","published-online":{"date-parts":[[2024,10,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"744","DOI":"10.1109\/18.661517","article-title":"Space-Time Codes for High Data Rate Wireless Communication: Performance Criterion and Code Construction","volume":"44","author":"Tarokh","year":"1998","journal-title":"IEEE Trans. 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