Study On Identification Technology Of Laser Encoding Based On Stochastic Resonance Detection Principle

Laser guided weapon, which behaves high precision and strongly anti-jamming, plays a very important position in latter-day wars. Therefore, it is important and pressing to develop the Laser guided photoelectric countermeasure device for avoiding being attacked. As an effective technology, laser deceptive mode of jamming has become one of the most important military researches of the world.The laser deceptive mode of jamming system is made of laser warning receiver, laser jamming source, false target and etc. This dissertation mainly researched on coding signal recognition of laser warning receiver and processed the correlation equivalent experiment. This technology could detect weak laser encoding signal in large background noise, on the other hand, it could recognize coding information in laser coding signal. The dissertation designed the laser encoding accomplished the simulation of laser guide signal, designed the photoelectric detection circuit to receive laser guided signal, and then designed measure circuit by stochastic resonance theory to pick up laser coding signal, at last, achieved the cell of dynamic threshold coding and identify the coding information on DSP.The results of series experiments show that the laser coder behaves multiform preferences and can simulate the function of target indicator of the laser guided weapon. The narrowest 20μs laser pulse can be responded well by the detection circuit. The stochastic resonance detection of weak signal has prominent effect especially on low signal-to-noise ratio signal. Less than 100k laser pulse can be identified by the identification circuit.The experiment system has practical meaning and contributes technical storage for the analysis and equivalent experiment of laser coding identifies system. At the same time, it could provide definite theoretic and experimental basic to the practical laser deceptive mode of jamming system.