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| 基于近程柱面SAR成像的改进距离徒动算法 |
| Improved range migration algorithm based on short-range cylindrical SAR imaging |
| 投稿时间：2020-05-08 |
| DOI：10.3969/j.issn.1005-5630.2020.06.002 |
| 中文关键词: 柱面成像 距离徒动算法（RMA） 合成孔径雷达成像 近程成像 三维成像 |
| 英文关键词:cylindrical imaging range migration algorithm(RMA) synthetic aperture radar imaging short range imaging 3D imaging |
| 基金项目:上海市科学技术委员会科研计划项目（18DZ1200805） |
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| 中文摘要: |
| 为了提高近程柱面合成孔径雷达（synthetic aperture radar, SAR）成像的距离徒动算法（range migration algorithm, RMA）成像效率，增加RMA在实际工程中的应用价值，提出了一种SAR成像的改进RMA。该算法采用驻点相位法近似求解获得了波数域下的相位补偿项，避免了传统近程柱面SAR成像的RMA中需对补偿项进行角度维傅里叶变换的步骤，降低了计算量，提高了成像效率。通过峰值旁瓣比（peak side-lobe ratio，PSLR）、峰值信噪比（peak signal to noise ratio，PSNR）和结构相似性（structural similarity，SSIM）对改进RMA的成像质量进行了客观评价。仿真和实验结果表明，该算法提高了近程柱面SAR成像的RMA成像效率。 |
| 英文摘要: |
| In order to improve the range migration algorithm (RMA) imaging efficiency of short-range cylindrical synthetic aperture radar (SAR) imaging and increase the application value of RMA in practical engineering, an improved RMA for SAR imaging is proposed. In this algorithm, the stationary phase method is used to obtain the phase compensation term in the wavenumber domain, which avoids the steps of angle dimension Fourier transform in the RMA of traditional short-range cylindrical SAR imaging, reduces the calculation amount and improves the imaging efficiency. The image quality of RMA was evaluated by peak-side lobe ratio (PSLR), peak signal to noise ratio (PSNR) and structural similarity (SSIM). Simulation and experimental results show that the algorithm improves the RMA imaging efficiency of short-range cylindrical SAR imaging. |
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