基于Duffing振子参数估计的伪码调相引信干扰信号设计

A reconstructed spoofing jammping method based on parameter blind estimation is proposed to effectively jam the pseudo-code phase-modulated fuze. On the basis of establishing the multiplication relation among the output signal of Duffing oscillator, the pseudo-random code signal of fuze signal, and the difference frequency signal of fuze signal and the internal driving signal of Duffing oscillator, the blind parameter estimation of fuze carrier frequency and pseudo-random sequence is realized based on the implied periodicity of Duffing oscillator. The fuze's jamming signal is reconstructed based on the high-precision estimated results, and the jamming effect of the jamming signal on the pseudo-code phase-modulated fuze is analyzed theoretically. The proposed blind parameter estimation method and the jamming effect of the reconstructed signal are simulated and verified by the semi-physical experiment. The simulated and experimental results show that the blind estimation method maintains good parameter estimation performance up to an SNR of -35 dB and further reconstructs the fuze jamming signal. It is superior to other traditional jamming methods.