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闫晓鹏 , 王珂 , 刘强 , 等 . 基于Duffing振子参数估计的伪码调相引信干扰信号设计 [J ] . 兵工学报 , 2022 , 43 ( 4 ): 729 - 736 .

YAN X P , WANG K , LIU Q , et al . Jamming signal design of pseudo-code phase modulation fuze based on duffing oscillator [J ] . Acta Armamentarii , 2022 , 43 ( 4 ): 729 - 736 . (in Chinese) DOI: 10.12382/bgxb.2021.0173 http://doi.org/10.12382/bgxb.2021.0173 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.

刘少坤 , 闫晓鹏 , 栗苹 , 等 . 基于码元重构的伪码调相脉冲多普勒引信干扰信号设计 [J ] . 兵工学报 , 2018 , 39 ( 6 ): 1088 - 1094 . DOI: 10.3969/j.issn.1000-1093.2018.06.007 http://doi.org/10.3969/j.issn.1000-1093.2018.06.007 为了有效干扰伪码调相脉冲多普勒引信，提出了基于码元重构的干扰信号设计方法。采用3阶相关函数对伪随机码进行了盲估计，基于估计出的伪随机码重构了引信干扰信号，理论分析了该干扰信号对伪码调相脉冲多普勒引信的干扰效果。仿真和试验结果表明，基于码元重构的干扰方法能够对伪码调相脉冲多普勒引信产生欺骗式干扰效果，与传统干扰信号相比，码元重构干扰具有更高的干扰效率。

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刘利民 , 李豪欣 , 李琦 , 等 . 基于分数阶傅里叶变换的低信噪比线性调频信号参数快速估计算法 [J ] . 电子与信息学报 , 2021 , 43 ( 10 ): 2798 - 2804 .

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曹伟浩 , 姚直象 , 夏文杰 , 等 . 基于插值短时分数阶傅里叶变换-变权拟合的线性调频信号参数估计 [J ] . 兵工学报 , 2020 , 41 ( 1 ): 86 - 94 . DOI: 10.3969/j.issn.1000-1093.2020.01.010 http://doi.org/10.3969/j.issn.1000-1093.2020.01.010 针对低信噪比下线性调频（LFM）信号参数估计精度不高的问题，提出一种基于Rife插值短时分数阶傅里叶变换（STFRFT）-变权拟合（VWSF）方法。该方法利用STFRFT提高LFM信号的聚集性，实现对LFM信号瞬时频率的高精度估计，并通过VWSF进一步提高信号初始频率和调频率的估计精度。推导得到了初始频率和调频率估计的克拉美-罗限（CRLB），分析了信号时长、滑窗次数等因素对CRLB的影响。仿真实验及海试结果表明，相比于传统基于短时傅里叶变换的估计方法，Rife插值STFRFT-VWSF方法具有更高的LFM信号参数估计精度。

CAO W H , YAO Z X , XIA W J , et al . Parameter estimation of linear frequency modulation signal based on interpolated short-time fractional Fourier transformand variable weight least square fitting [J ] . Acta Armamentarii , 2020 , 41 ( 1 ): 86 - 94 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2020.01.010 http://doi.org/10.3969/j.issn.1000-1093.2020.01.010 A Rife interpolation short-time fractional Fourier transform (STFRFT) -variable weight least square fitting (VWSF) algorithm is proposed for solving the problem of low parameter estimation accuracy of linear frequency modulation (LFM) signal under low signal-to-noise ratio (SNR). STFRFT is used to improve the aggregation of LFM signals, and the estimation accuracy of instantaneous frequency of signal is improved by VWSF, thus estimating the instantaneous frequency, initial frequency and modulation frequency of LFM signal. The Cramer-Rao lower bound (CRLB) of the signal parameters estimation is derived, and the factors affecting the estimated parameter CRLB and the variation of CRLB with it are analyzed. The simulated results show that the Rife interpolation STFRFT-VWSF algorithm has better estimation accuracy of LFM signal parameters, the parameter estimation and CRLB theoretical analysis are rational, and the feasibility of the algorithm is proven through sea test. Key

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