...
首页> 外文期刊>Journal of Applied Remote Sensing >Synthetic aperture radar imaging simulator for pulse envelope evaluation
【24h】

Synthetic aperture radar imaging simulator for pulse envelope evaluation

机译:脉冲包络评估的合成孔径雷达成像模拟器

获取原文
获取原文并翻译 | 示例
           

摘要

A simulator for spotlight synthetic aperture radar (SAR) image formation is presented. The simulator produces radar returns from a virtual radar positioned at an arbitrary distance and altitude. The radar returns are produced from a source image, where the return is a weighted summation of linear frequency-modulated (LFM) pulse signals delayed by the distance of each pixel in the image to the radar. The imagery is resampled into polar format to ensure consistent range profiles to the position of the radar. The SAR simulator provides a capability enabling the objective analysis of formed SAR imagery, comparing it to an original source image. This capability allows for analysis of various SAR signal processing techniques previously determined by impulse response function (IPF) analysis. The results suggest that IPF analysis provides results that may not be directly related to formed SAR image quality. Instead, the SAR simulator uses image quality metrics, such as peak signal-to-noise ratio (PSNR) and structured similarity index (SSIM), for formed SAR image quality analysis. To showcase the capability of the SAR simulator, it is used to investigate the performance of various envelopes applied to LFM pulses. A power-raised cosine window with a power p = 0.35 and roll-off factor of β = 0.15 is shown to maximize the quality of the formed SAR images by improving PSNR by 0.84 dB and SSIM by 0.06 from images formed utilizing a rectangular pulse, on average.
机译:提出了一种用于聚光灯合成孔径雷达(SAR)图像形成的模拟器。模拟器产生从位于任意距离和高度定位的虚拟雷达的雷达返回。雷达返回由源图像产生,其中返回是由图像中的每个像素中的每个像素到雷达的距离延迟的线性频率调制(LFM)脉冲信号的加权求和。图像重新采样成极性格式,以确保雷达位置的一致范围曲线。 SAR模拟器提供了一种能力,使成立的SAR图像的客观分析,将其与原始源图像进行比较。这种能力允许分析先前通过脉冲响应函数(IPF)分析确定的各种SAR信号处理技术。结果表明,IPF分析提供了与形成的SAR图像质量直接相关的结果。相反,SAR模拟器使用图像质量指标,例如峰值信噪比(PSNR)和结构相似度指数(SSIM),用于形成SAR图像质量分析。为了展示SAR模拟器的能力,它用于研究应用于LFM脉冲的各种信封的性能。示出了具有功率P = 0.35和β= 0.15的滚动因子的功率升高的余弦窗口,通过从利用矩形脉冲形成的图像将PSNR改善0.84dB和SSIM来最大化形成的SAR图像的质量。一般。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号