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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Airborne SAR processing of highly squinted data using a chirp scaling approach with integrated motion compensation
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Airborne SAR processing of highly squinted data using a chirp scaling approach with integrated motion compensation

机译：使用集成运动补偿的线性调频缩放方法，机载SAR处理高斜视数据

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摘要

Proposes a new approach for high-resolution airborne SAR data processing, which uses a modified chirp scaling algorithm to accommodate the correction of motion errors, as well as the variations of the Doppler centroid in range and azimuth. By introducing a cubic phase term in the chirp scaling phase, data acquired with a squint angle up to 30/spl deg/ can be processed with no degradation of the impulse response function. The proposed approach is computationally very efficient, since it accommodates the variations of Doppler centroid without using block processing. Furthermore, a motion error extraction algorithm can be incorporated into the proposed approach by means of subaperture processing in azimuth. The new approach, denoted as extended chirp scaling, is considered to be a generalized algorithm suitable for the high-resolution processing of most airborne SAR systems.
机译：提出了一种用于高分辨率机载SAR数据处理的新方法，该方法使用一种改进的线性调频缩放算法来适应运动误差以及多普勒质心在距离和方位角上的变化。通过在线性调频缩放阶段引入三次相位项，可以处理斜视角度高达30 / spl deg /的数据，而不会降低脉冲响应功能。所提出的方法在计算上非常有效，因为它可以适应多普勒质心的变化而无需使用块处理。此外，可以通过子孔径的方位角处理将运动误差提取算法合并到所提出的方法中。被称为扩展线性调频标度的新方法被认为是适用于大多数机载SAR系统的高分辨率处理的通用算法。

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