Influence of rough surface on the ranging distribution of constant fraction discriminator

Aiming effect of the rough surface on the pulse laser ranging distribution of Constant fraction discriminator (CFD), based on the traditional laser radar equation and rough surface characteristic, incoherent pulse laser detection equation of plane target is derived considering launch process as the shock response of linear system. Based on principle of CFD, the probability density function of ranging distribution of CFD is derived. The pulse laser CFD distribution with rough plane is deduced with the echo equation and probability density function. The influence of different plane angles, reflectivity, noise characteristics and pulse width on the distance distribution is analyzed by simulation. The simulation results show that CFD can effectively suppress walk error caused by different angles of rough plane.