相干式CO_2激光雷达角跟踪系统

Angular Tracking Systems of Coherent CO_2 Laser Radar

本文简述了相干式ＣＯ２激光雷达角跟踪系统的工作原理，讨论了激光雷达距离方程，分析了四象限探测器跟踪方法及误差特性。对于扩展朗伯目标，可采用边沿跟踪。为了提高信噪比，用频率搜索及窄带滤波的方法来检测信号，文中给出了接收机方框图和实验结果，本文还讨论了通道不一致性影响及校正方法。

This paper describes briefly the basic principle of angular tracking systems of coherent CO2 laser radar, discusses laser radar range equation, analyses quadrant detector tracking method and error character. Edge tracking is used for extended lambertian target. The frequency scanning and tracking narrow filter for advanced signal to noise ratio may be used to detect signal of the angular tracking system. The channels ununiformity effect and compensating method are discussed.