Research In The Digitized System Of Signal Processing For Pulse Laser Ranging

In recent years, because the range finder scope of pulse laser ranging was broad, the range finder precision was high, so it was applied in aspects of civil and military widely.This thesis in view of conventional's insufficiency for pulse laser distance measuring system simulation type processing pulse laser echo signal, proposed that take FPGA as the core of digitized pulse laser ranging signal processing system, carries on the noise reduction with aid the method of FIR digital filtering union autocorrelation examination to pulse laser echo signal, the promotion signal-to-noise ratio of pulse laser echo signal, enables pulse laser signal appearance to come out from disturbance fully.This thesis first is briefing the principle of pulse laser ranging and convention range measuring system structure, then analysis the effect of range finder receiving system by noise. The key design take FPGA as the core of digitized pulse laser ranging signal processing system, carries on detailed explanation to system each constituent, and gives software module simulation. Carries on A/D transformation after pulse laser echo signal, carries on processing using the method of FIR digital filtering union autocorrelation examination to pulse laser echo signal, filters to pulse laser echo signal disturbance. After simulation of MATLAB proof method is feasible, and carries on test to digitized pulse laser signal processing system, receives the good results.