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首页> 外文会议>Conference on radar sensor technology XVII >A Method to Evaluate Residual Phase Error for Polar Formatted Synthetic Aperture Radar Systems
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A Method to Evaluate Residual Phase Error for Polar Formatted Synthetic Aperture Radar Systems

机译：一种评估极性格式合成孔径雷达系统残留相位误差的方法

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摘要

Synthetic aperture radar systems that use the polar format algorithm are subject to a focused scene size limit inherent to the polar format algorithm. The classic focused scene size limit is determined from the dominant residual range phase error term. Given the many sources of phase error in a synthetic aperture radar, a system designer is interested in how much phase error results from the assumptions made with the polar format algorithm. Autofocus algorithms have limits to the amount and type of phase error that can be corrected. Current methods correct only one or a few terms of the residual phase error. A system designer needs to be able to evaluate the contribution of the residual or uncorrected phase error terms to determine the new focused scene size limit. This paper describes a method to estimate the complete residual phase error, not just one or a few of the dominant residual terms. This method is demonstrated with polar format image formation, but is equally applicable to other image formation algorithms. A benefit for the system designer is that additional correction terms can be added or deleted from the analysis as necessary to evaluate the resulting effect upon image quality.
机译：使用极性格式算法的合成孔径雷达系统受到极性格式算法固有的聚焦场景大小限制。经典聚焦的场景尺寸限制是由主要的残差相位误差项确定的。鉴于合成孔径雷达中的许多相位误差来源，系统设计器对具有极性格式算法的假设产生的相位误差有多疑问。自动对焦算法限制了可以校正的相位误差的数量和类型。目前的方法只需一个或几个剩余相位误差的术语。系统设计人员需要能够评估剩余或未纠正的相位误差术语的贡献，以确定新的聚焦场景大小限制。本文介绍了一种估计完整的残余相位误差的方法，而不仅仅是一种或几个优势残余术语。使用极性格式图像形成对该方法进行说明，但同样适用于其他图像形成算法。系统设计器的好处是，可以根据需要从分析中添加或删除额外的校正项，以评估结果对图像质量的影响。

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