| 无人机机载合成孔径雷达的高速数据传输 |
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| 作者姓名： | 刘荣科 张晓林 |
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| 作者单位： | 北京航空航天大学!北京100083 |
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| 摘 要： | 无人机机载合成孔径雷达 (SAR)的高速数据传输问题是长期以来制约 SAR载荷应用的重要问题。文中通过对 SAR原始数据、SAR成像、SAR图像数据以及传输系统的研究 ,提出将 SAR成像过程分为两个阶段 ,在机上进行预滤波 ,在地面进行距离向压缩、方位向压缩等成像过程 ,实时传输经过预滤波和压缩后的数据。该方案在保证 SAR方位向和距离向分辨率及测绘带带宽的前提下 ,能够有效降低下传数据率 (具体值取决于预滤波率 ) ,同时不增加无人机的载荷 ,是一种可行的实时高速数据传输方案
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| 关 键 词： | 合成孔径雷达 无人驾驶飞机 高速数据传输 实时成像 预滤波 |
High Speed Data Downlink of Airborne SAR in the Pilotless Aircraft |
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| Authors: | Liu Rongke Zhang Xiaolin |
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| Institution: | Liu Rongke Zhang Xiaolin |
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| Abstract: | The problem of high speed data downlink from airborne SAR (Synthetic Aperture Radar) always restricts the application of SAR.The characteristics of SAR original datas,image data,real time processing and downlink transmission are studied in this paper.A new downlink scheme is proposed,in which the real time processing is divided into two stages,the airborne stage and the ground stage.So the downlink data rate is reduced largely after SAR source data had been pre filtered and compressed,while the azimuth resoltuion and range resolution and swath width are preserved. |
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| Keywords: | Synthetic aperture radar Pilotless aircraft High speed downlink Real-time processing Pre-filtering |
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