基于LabVIEW的固体相干激光雷达多普勒测速的信号处理  

Signal Processing in Solid-State Coherent Lidar Using LabVIEW

作　　者：杨苏辉[1] 蒋奇君[1] 张海洋[1] 关俊娜[1] 赵长明[1] 

机构地区：[1]北京理工大学信息科学技术学院光电工程系,北京100081

出　　处：《北京理工大学学报》2008年第12期1105-1108,1112,共5页Transactions of Beijing Institute of Technology

基　　金：国家部委预研项目(41302010105)

摘　　要：建立了固体相干激光雷达对运动目标速度的测量系统.雷达发射源为种子注入Nd∶YAG脉冲激光器,回波通过光纤耦合器与本振合束,利用泰克示波器采集外差信号,使用LabVIEW进行信号处理.利用测量多普勒频移测量运动目标的速度,使用放大镜式的快速傅里叶变换提高频谱的频率分辨率,从而提高了测量速度的精度.Measurement of speed of moving object by a solid-state coherent lidar is studied. An injection seeding Nd ： YAG pulse laser is used as the transmitter. The reflected signal and referenced signal are combined via a single mode fiber coupler, the output heterodyne signal from the fiber coupler is detected by a photo detector and sampled by a digital oscilloscope. LabVIEW is applied to build up the interface between the oscilloscope and PC. Resolution of the measured frequency shift is improved using zoom fast Fourier transform（ZFFT） so that the resolution of measurement of speed is improved.

关 键 词：相干激光雷达 信号处理 多普勒频移 放大镜式的快速傅里叶变换 

分 类 号：TN958.98[电子电信—信号与信息处理]