Repeater jamming suppression method for pulse Doppler fuze based on identity recognition and chaotic encryption

Repeater jamming suppression method for pulse Doppler fuze based on identity recognition and chaotic encryption
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基于身份识别和混沌加密的脉冲多普勒引信中继干扰抑制方法

DOI:
10.1016/j.dt.2020.06.023
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发表时间:
2020-07
期刊:
影响因子:
5.1
通讯作者:
Ping Li
Ping Li
中科院分区:
工程技术2区
文献类型:
--
作者:
Jian Dai;Xin-hong Hao;Qiang Liu;Xiao-peng Yan;Ping Li

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脉冲多普勒(PD)引信在现代战场上得到了广泛的应用。然而,随着转发式干扰的威胁,特别是数字射频存储技术的发展,传统PD引信抗转发式干扰的不足日益显现。为此,提出了一种基于身份识别和混沌加密的PD引信转发式干扰抑制方法。每个引信都有自己的ID,在发射信号的每个脉冲周期内用不同的混沌二进制序列加密。图钉形模糊函数具有良好的分辨率和距离截止特性。重点分析了该方法的抗中继干扰能力,在不同信噪比下的仿真结果表明,该方法具有较强的抗中继干扰能力和距离分辨力。此外,处理增益、误比特率和相关函数也会影响抗中继干扰的能力。仿真结果验证了理论分析的正确性,表明该方法能显著提高PD引信的抗转发干扰能力。
Pulse Doppler (PD) fuze is widely used in current battlefield. However, with the threat of repeater jamming, especially digital radio frequency memory technology, the deficiency in the anti-repeater jamming of a traditional PD fuze increasingly emerges. Therefore, a repeater jamming suppression method for a PD fuze based on identity (ID) recognition and chaotic encryption is proposed. Every fuze has its own ID which is encrypted with different chaotic binary sequences in every pulse period of the transmitted signal. The thumbtack-shaped ambiguity function shows a good resolution and distance cut-off characteristic. The ability of anti-repeater jamming is emphatically analyzed, and the results at different signal-to-noise ratio (SNR) show a strong anti-repeater jamming ability and range resolution that the proposed method possesses. Furthermore, the anti-repeater jamming ability is influenced by processing gain, bit error rate (BER) and correlation function. The simulation result validates the theoretical analysis, it shows the proposed method can significantly improve the anti-repeater jamming ability of a PD fuze.
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