线性增益调制激光雷达系统参数对测距精度的影响

测距精度是激光雷达系统的重要参数，测距精度影响因素的研究对于提高激光雷达系统性能具有重要价值。增益调制无扫描激光雷达是一种新体制的激光雷达，其测距精度的影响因素不同于传统飞行时间测量的激光雷达系统。从增益调制激光雷达距离表达式出发，推导了增益调制激光雷达各系统参数对于距离精度的影响，综合考虑了ICCD的调制误差、回波强度较低时的光子噪声、探测器噪声、微通道板的增益饱和等因素，给出了测距精度与回波功率的关系曲线。得出增益调制无扫描激光雷达系统存在一个回波强度区间，在该强度区间内，无扫描激光雷达的测距精度是区间外的2倍以上。

Influence of linear gain modulation lidar system parameters on range accuracy

Range accuracy is one of the most important parameters in a radar system. Research on the influence of range accuracy has an important value to improve the laser performance of radar. As a novel lidar system, linear gain modulation scannerless lidar acquires range information from image intensity by using the technique of range-intensity mapping. The relationship between range resolution and lidar system parameters was under investigated, taking different factors into consideration, including the modulation error of ICCD, the photonic noise at low echo intensity, the detector noise, and the gain saturation of micro channel plate. This paper presents that, within a certain region of echo signal power, range resolution can be improved by over twice that of outside the region, leading to great improvements of lidar system performance.