Simulation of the characteristics of backscattering signals for frequency modulated continuous wave laser fuze

Frequency modulated continuous wave (FMCW) laser fuze has better resistance to interference than the pulse laser fuze, but it is still affected by cloud and fog. As the backscattering laser signals from cloud and fog may cause a false alarm and the laser power is attenuated by the scattering and absorption of the particles. In order to study the characteristics of echo for FMCW laser fuze, the Monte Carlo simulation model for FMCW laser fuze is built based on FMCW laser detection principle and Mie scattering theory. In the case of FMCW laser fuze and the target in the cloud and fog, the backscattering signals are simulated under the different visibility, and the influences of visibility in cloud and fog on FMCW laser fuze backscattering signals are analyzed. The proposed simulation method can be used to optimize the parameter of FMCW laser fuze for the improvement of the anti-interference ability.