Realization of the code correlation of the simulated echo for the pseudorandom phase-coded PD fuze

An approach, which realizes the code correlation of the simulated echo for a kind of pseudorandom phase-coded PD (pulse Doppler) radar fuze, is presented. According to the characteristics of m sequence, by adopting the technology of the synchronization of the phase modulating signal of the fuze, the effect of inherent delay of the simulation system and other path delay is avoided, and the code correlation of zero delay or very close target signal are realized. A previous-phase-coding technology is used to simulate the clutter. This technique can make the clutter with different range ambiguities maintain the 0-π phase shifting error feature of the transmitting signal of fuze.