Simulation For System Of Focal Plane Of Minitype Solidity Ladar

In this paper, the small solid-state laser radar imaging focal plane is Geiger mode avalanche photodiode tube (APD) detector for 3D imaging radar. It has the following advantages compared to scanning imaging radar :Be able to achieve single-pulse emission imaging, the time is short, that can be installed in the campaign platform, right camouflage is the target repeatedly in a short period of time to achieve detection, access to a few frames, Then stack algorithm is useed to aquire a clear target image.This paper introduced first avalanche photodiode (APD) detector principle. And analysised thedetection probability of single-pulse and multi-pulse.According to the parameters of the use of laser radar equation, the echo intensity was calculated ,which provided a reliable basis for simulation. On the basis of the original target scene in our laboratory ,to which this paper added new targets .And some simulation were done as following. First, in order to analyse the unusual distance analysis, the surface structure of the different targets were simulated . The root mean square error (RMSE) was introdued , and impact of signal-to-noise ratio (SNR) to the radar system was thought and caculated. According to experimental data, RMSE - SNR curve was fit. Secondly, in order to learn about the impact of Gaussian beam to the range image,simulation experiment was done. A simulation experiment with the uniform illumination and the Gaussian beam was done ,the characteristic of the gauss beam to a range image was obtained. A algorithm to built Gauss coefficient matrix was raised here. Third, in the face of coherent light imaging process will be speckle noise impact, designed speckle simulation program. Compared with other noise (background light, dark current, Scattering Echo) ,the the RMSE was analysised. Fourthly, in order to find relationship between the receiver aperture and target detection probability, simulation program was designed ,and then the result was obtained . Finally, in the fourth chapter, simulation was done about the characteristics of the application of the radar, the flight platform without jitter and jitter under different circumstances was analysised in the simulation results.