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首页> 外文期刊>Journal of electrical and computer engineering >Signal Processing Based Remote Sensing Data Simulation in Radar System
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Signal Processing Based Remote Sensing Data Simulation in Radar System

机译：雷达系统中基于信号处理的遥感数据仿真

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摘要

Range cell migration has a serious impact on the precision of image formation, especially for high-resolution and large-scale imaging. To get the full resolution and high quality of the image, the range cell migration correction in the azimuth time domain must be considered. For tackling this problem, this paper presents a novel and efficient range cell migration correction method based on curve fitting and signal processing. By emulating a curve to approximate the range-compressed echo of a strong point, the range location indexes of the strong point along the azimuth direction can be obtained under the least squares criterion. The merits of the proposed method are twofold: (1) the proposed method is robust to the uncertainty of system parameters (strong tolerance) under real flights and (2) the generalization of the proposed method is better and can be easily adapted to different synthetic aperture radar (SAR) modes (e.g., monostatic and bistatic). The experimental results on real remote sensing data from both the monostatic and the bistatic SAR demonstrate the effectiveness. The regressed distance curve is completely coincident with the trajectory of strong points of the echo. Finally, the imaging focus results also validate the efficiency of the proposed method.
机译：距离细胞迁移严重影响成像的精度，尤其是对于高分辨率和大规模成像而言。为了获得完整的分辨率和高质量的图像，必须考虑方位角时域中的距离像元迁移校正。为了解决这个问题，本文提出了一种基于曲线拟合和信号处理的新型有效的距离像元迁移校正方法。通过模拟一条曲线来近似强点的距离压缩回波，可以在最小二乘准则下获得沿方位角方向的强点的距离位置索引。该方法的优点有两点：（1）该方法对真实飞行中系统参数的不确定性（强公差）具有鲁棒性；（2）该方法的推广性更好，并且可以容易地适应于不同的合成方法。孔径雷达（SAR）模式（例如，单基地和双基地）。来自单基地和双基地SAR的真实遥感数据的实验结果证明了其有效性。回归的距离曲线与回波的强点轨迹完全重合。最后，成像焦点结果也验证了该方法的有效性。

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  • 来源
    《Journal of electrical and computer engineering》 |2017年第2期|6780305.1-6780305.9|共9页
  • 作者

    Renxuan Hao; Tan Guo;

  • 作者单位

    School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, China;

    College of Communication Engineering Chongqing University, Chongqing China;

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  • 正文语种 eng
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