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运动补偿是逆合成孔径雷达成像的关键。现已有许多相关算法。秩 -相位估计 (ROPE)是一种性能较好的相位误差估计器 ,正被广泛地应用于 SAR图像处理。本文将 ROPE算法用于 ISAR相位补偿 ,给出了具体实现的步骤 ,详细分析了 ROPE算法在 ISAR相位补偿中的性能。在 ISAR数据基本符合 ROPE算法模型时 ,ROPE算法可获得高质量的补偿效果 ,而且实现简单 ,速度快。文中最后用 ISAR外场实测数据比较了 ROPE与其他相位补偿方法的成像结果。
Motion compensation is the key to inverse synthetic aperture radar imaging. There are many related algorithms. Rank-phase estimation (ROPE) is a better performance phase error estimator, and is widely used in SAR image processing. In this paper, the ROPE algorithm is used for ISAR phase compensation, and the concrete steps are given. The performance of ROPE algorithm in ISAR phase compensation is analyzed in detail. When the ISAR data is basically in line with the ROPE algorithm model, the ROPE algorithm can obtain high-quality compensation effects, and the implementation is simple and fast. In the end, the imaging results of ROPE and other phase compensation methods are compared with the measured data from ISAR field.