Design Of High Complexity Laser Pulse Encoder Based On FPGA

The modern war has gone from a massive collectivization to a non-contact regional precision strike.The new model,which is represented by laser precision guided weapons and laser warning,is becoming routine and generalization.The various laser signals in the battlefield become more and more complex,how to ensure the normal work of the laser signal,and how to suppress the laser threat of the other side becomes more and more important.Using the relevant laser coding technology,we designed a high-complexity laser pulse encoder.The laser pulse coding system has a good human-computer interaction interface.The upper and lower computer systems can control the output of various laser pulse code signals,and it can choose the frequency and encoding type of the encoded signal you want to output to make the system more flexible and convenient.The dual-loop control is used as the driving design of the laser,which guarantees the stability of the output of the laser coded signal and improves the signal to noise ratio.Using FPGA to receive the GPS module UTC(Coordinated Universal Time,UTC)Time for calibration,the local clock signals using PPS(Pulse Per Second,PPS)seconds timer pulse signal as a source of reference,not only improve the synchronization precision of the laser pulse code signal,and further improved the precision of laser coding.Through several cycles,arithmetic and pseudo random coding are the basic theoretical analysis,through the FPGA implementation of coding method are given,using the simulation software to the design of five kinds of laser pulse coding method simulation comparison,from the simulation results verify the validity of the system design.On the basis of simulation and actual test experiment was carried out,through the actual synchronization signal and the pseudo random signal test waveform can be seen that the system has high accuracy and can meet the design requirements.The modular design of this system,not only is it capable of achieving the output of the various laser impulses that we already know,but it can also produce other sophisticated laser pulse code,which has a certain practical application value.