基于合成孔径激光雷达的目标探测

为了研究合成孔径激光雷达在目标探测中的应用,从建立合成孔径激光雷达的信号传输及回波模型出发,理论分析了合成孔径激光雷达回波信噪比、探测距离、合成孔径时间和解线性调频处理4个方面的特点与优点,并与一般相干体制的激光雷达以及合成孔径雷达进行了对比。结果表明,合成孔径激光雷达比一般相干体制雷达具有更高的回波信噪比和更远的探测距离,且相对于合成孔径雷达具有更快的成像速度。这一结果有助于合成孔径激光雷达应用于远距离目标探测、跟踪与快速预警。

Target Detection Based on Synthetic Aperture Ladar

To order to achieve the application of synthetic aperture ladar (SAL) in target detection,the characteristics and strong points of SAL in returning wave signal-to-noise ratio(SNR),detecting range,synthetic aperture time and linear frequency modulation orad demodulation were theoretically analyzed based on the signal transmission model and returning wave model.The performances were compared with traditional heterodyne ladar and synthetic aperture radar(SAR).The results show that SAL has higher returning wave SNR and farther detecting range than traditional heterodyne ladar,and the imaging speed is faster than SAR,which benefit the application of SAL on long range target detecting,tracking and fast early warning.