Approach for ISAR imaging of near-field targets based on coordinate conversion and image interpolation

• 来源期刊: 系统工程与电子技术（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: DEFENCE ELECTRONICS TECHNOLOGY
• 页码范围: 425-436
• 页数: 12页
• 语种: 英文
• DOI: 10.23919/JSEE.2021.000036

摘要

Inverse synthetic aperture radar (ISAR) imaging of near-field targets is potentially useful in some specific applica-tions, which makes it very important to efficiently produce high-quality image of the near-field target. In this paper, the simpli-fied target model with uniform linear motion is applied to the near-field target imaging, which overcomes the complexity of the traditional near-field imaging algorithm. According to this signal model, the method based on coordinate conversion and image interpolation combined with the range-Doppler (R-D) algorithm is proposed to correct the near-field distortion problem. Com-pared with the back-projection (BP) algorithm, the proposed method produces better focused ISAR images of the near-field target, and decreases the computation complexity significantly. Experimental results of the simulated data have demonstrated the effectiveness and robustness of the proposed method.