Stafford Jason W, Duncan Bradley D, Rabb David J
J Opt Soc Am A Opt Image Sci Vis. 2017 May 1;34(5):A1-A9. doi: 10.1364/JOSAA.34.0000A1.
Simultaneous range compression and aperture synthesis is experimentally demonstrated with a stepped linear frequency modulated waveform and holographic aperture ladar. The resultant three-dimensional (3D) data has high resolution in the aperture synthesis dimension and is recorded using a conventional low bandwidth focal plane array. Individual cross-range field segments are coherently combined using data driven registration and phase correction methods allowing range compression to be performed without the benefit of a coherent waveform. Furthermore, we demonstrate a synergistically enhanced ability to discriminate image objects due to the coaction of range compression and aperture synthesis. We show that two objects can be precisely located in 3D space, despite being unresolved in two directions, due to resolution gains in both the range and azimuth cross-range dimensions.
利用步进线性调频波形和全息孔径激光雷达，通过实验证明了同时进行距离压缩和孔径合成。所得的三维（3D）数据在孔径合成维度上具有高分辨率，并使用传统的低带宽焦平面阵列进行记录。使用数据驱动配准和相位校正方法将各个横向距离场段进行相干组合，从而能够在没有相干波形的情况下进行距离压缩。此外，由于距离压缩和孔径合成的共同作用，我们展示了协同增强的图像目标辨别能力。我们表明，尽管在两个方向上无法分辨，但由于在距离和方位横向距离维度上的分辨率提高，两个目标可以在三维空间中精确定位。
