介绍了线性调频连续波激光雷达的系统结构,量化分析了探测原理、距离分辨率及多普勒效应。分析表明,该雷达 具有优良距离分辨能力,目标的距离及速度信息分别包含于中频信号的初始频率和中频调频斜率之中;通过仿真实验直 观说明了比值带宽对目标速度测量影响,应采用非平稳信号处理解算目标信息。

LFMCW lidar architecture is introduced and the detecting principle, the distance resolution and Doppler effect are analysed quantitatively. The analysis shows that the radar has high range resolution capability, the target distance and speed information respectively contained in the initial frequency of the intermediate frequency signals and intermediate frequency modulation slope. Simulation experiment demonstrates visually effect of ratio bandwidth on the target velocity measurement, and must adopt nonstationary signal processing solution for target information.