Key technology on high-sensitivity detection in spaceborne laser radars
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摘要: 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9nW，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。Abstract: 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 9nW, 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.
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Keywords:
- optoelectronics /
- sensitivity /
- high gain amplifier /
- spaceborne /
- laser /
- threshold
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Figure 5. Relationship between detection probability and signal-to-noise ratio with different threshold-to-noise ratio
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