Research and simulation of high precision pulsed laser fuze

Laser fuze is a kind of proximity fuze developed with laser technology. And its precision of ranging has a direct influence on the overall performance of the system. Spartan III series FPGA chip are employed from Xilinx company. Through phase shifting the primary reference clock and ranging with four doubled-frequency clocks with phase shiftings of 90 degree, the ranging precision can be improved obviously. The theoretical ranging error is 0.1875 m and the result is proven by simulation with Modelsim. Valuable conclusions are drawn for improving the ranging precision of laser fuze.