Abstract: The anti-active noise jamming performance of pulse Doppler (PD) fuze is quantitatively studied based on the characterization parameters of processing gain and power spectrum in order to reveal the jamming mechanism and improve the anti-jamming performance of PD fuze. The input signal-to-jamming ratio, output signal-to-jamming ratio and processing gain of the procedure from the echo reception to the correlation detection under the radio frequency noise jamming, noise amplitude modulation jamming and noise frequency modulation jamming are deduced. The signal feature parameters affecting the anti-active noise jamming performance of PD fuze are obtained, and the simulation verification is carried out. The quantitative analysis and simulation results indicate that the PD fuze has the strong performance of anti-active noise jamming, and its performance of anti-active noise jamming is mainly determined by the pulse duty cycle and the bandwidth of Doppler filter.

Key words: ordnance science and technology, pulse Doppler fuze, active noise jamming, signal-to-jamming ratio, processing gain, radio frequency noise jamming, noise amplitude modulation jamming, noise frequency modulation jamming