Signal Processing Techniques for LIDAR System.pdf

1、LIDAR is an important technique for the measurement of range, velocity andvibration, as well as atmospheric parameters.In literature, direct detection, coherentheterodyne detection and coherent homodyne detection represe

2、nt the main basic detectionstructures used in FMCW lidar system.We investigated the different detection techniquesespecially direct detection, coherent heterodyne detection and coherent homodyne detectionon FMCW lidar sy

3、stem using Optisystem package for the first time.A model for target,propagation channel and various detection techniques were developed using Optisystempackage.A comparative study among various detection techniques for F

4、MCW lidar systemsis done analytically and simulated using the developed model.
　　Through this work; the lidar receiver utilizes Mach-Zehender intensity (MZI)modulator for the first time and cooperated with a single ph

5、otodetector for range andvelocity measurement.This overcomes the unbalanced photodetection problem of dualphotodetetor used in coherent detection and isn't affected by the phase diversity problemwhich faces the homodyne

6、detection.
　　Distance detection and Doppler detection based on MZI modulator cooperated withsingle photodetector are presented for FMCW lidar system.A mathematical analysis for bothproposed detection is introduced.Pro

7、posed distance and Doppler detection based on MZImodulator are modeled and simulated using Optisystem package.
　　Performance analysis of both proposed detection is presented at different operatingpoints for MZI modula

8、tor especially quadrature point and null transmission point.Ananalytical comparison of both proposed distance detection and Doppler detection based onMZI modulator with traditional direct detection is presented through t

9、his work.
　　The developed model using Optisystem package verifies the mathematical model ofboth proposed detection.The results demonstrate that the operation of proposed detectionbased on MZI modulator at null transmi

10、ssion point improves the range resolution by twoorders than other traditional detection techniques.In addition to the performance of proposeddistance detection based on MZI modulator achieved better performance than dire