基于Duffing振子参数估计的伪码调相引信干扰信号设计

为有效干扰伪码调相引信,提出基于Duffing振子参数盲估计的重构式引信欺骗式干扰方法.在建立Duffing振子输出信号、引信信号的伪随机码信号、引信信号与Duffing振子内策动力信号差频信号的乘法关系式基础上,基于Duffing振子隐含周期性实现对伪码调相引信载频和伪随机序列的盲参数估计.根据高精度估计的结果重构引...

Jamming Signal Design of Pseudo-code Phase Modulation Fuze Based on Duffing Oscillator

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，andthe 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.