论文部分内容阅读
合成孔径雷达(SAR)具有突出的高分辨率成像能力,在民用和军用领域体现出重要的应用价值。在复杂的作战环境中,提高SAR的电子对抗性能成为SAR技术发展考虑的重要方面。提出一种新的SAR无源成像方法,该成像方法将单部机载SAR接收机或多部机载SAR接收机在不同位置处接收到的回波信号相关,对相关后的信号采用滤波反投影方法进行成像,可重建场景的辐射率。该成像方法不需要已知发射源的波形和位置信息,适用于非合作发射源,具有良好的电子对抗性,并且适用于任意载机飞行轨迹、多基SAR等情形。仿真验证以双基情形为例,验证了该SAR无源成像方法的有效性,并分析了影响成像质量的各关键因素。
Synthetic aperture radar (SAR) with outstanding high-resolution imaging capabilities in civil and military applications reflect the important application value. In complex operational environments, improving the electronic response performance of SAR has become an important aspect of SAR technology development. A new SAR passive imaging method is proposed. The imaging method correlates the echo signals received by single airborne SAR receiver or multi-airborne SAR receivers at different positions, and uses the filtered inverse Projection method for imaging, the scene can be rebuilt emissivity. The imaging method does not need the waveform and position information of the known emission sources. It is suitable for non-cooperative emission sources and has good electronic confrontation. The imaging method is suitable for any carrier flight path, multi-base SAR and so on. The simulation verifies the effectiveness of the SAR passive imaging method by taking the bistatic case as an example, and analyzes the key factors affecting the imaging quality.