星载激光雷达高灵敏信号探测的关键技术研究

Key technology on high-sensitivity detection in spaceborne laser radars

为了提高星载激光雷达探测灵敏度,采用高增益放大电路设计了探测电路,理论分析了探测概率、虚警率、信噪比等指标的制约关系,对带宽、增益、阈值门限等参量进行优化设计,并进行了实验验证。结果表明,探测电路实现了灵敏度9n W,探测概率95%,虚警概率10-5,相比国内同类产品有显著提高。这一结果对星载激光雷达的发展是有帮助的。

In order to improve the detection sensitivity of a spaceborne lidar,high gain amplifier circuit was used to design the detection circuit. The relationships among detection probability,false alarm rate,signal-to-noise ratio and other indicators were analyzed theoretically. Bandwidth,gain,threshold and other parameters were optimized. Experimental verification was also carried out. The results show that the sensitivity of detection circuit is 9 n W,the detection probability is 95%,and the false alarm probability is 10-5. Compared with the domestic similar products,the detection circuit has been significantly improved.The study is helpful for the development of spaceborne lidars.