系统工程与电子技术 ›› 2022, Vol. 44 ›› Issue (11): 3330-3337.doi: 10.12305/j.issn.1001-506X.2022.11.06

• 电子技术 • 上一篇    下一篇

跳频电磁引信干扰感知技术方案研究

谭思炜1, 唐波1,*, 张林森1, 张森2   

  1. 1. 海军工程大学兵器工程学院, 湖北 武汉 430033
    2. 海军工程大学电子工程学院, 湖北 武汉 430033
  • 收稿日期:2021-09-07 出版日期:2022-10-26 发布日期:2022-10-29
  • 通讯作者: 唐波
  • 作者简介:谭思炜 (1985—), 男, 讲师, 博士, 主要研究方向为水下近场目标探测与识别技术|唐波 (1980—), 男, 讲师, 博士, 主要研究方向为水下信号处理技术、现代测试技术|张林森 (1982—), 男, 讲师, 博士, 主要研究方向为水声信号对抗与处理技术|张森 (1982—), 男, 副教授, 博士, 主要研究方向为水下导航与控制技术
  • 基金资助:
    国家自然科学基金(41976177);湖北省自然科学基金(2018CFC866)

Interference sensing technical solution for frequency hopping electromagnetic fuze

Siwei TAN1, Bo TANG1,*, Linsen ZHANG1, Sen ZHANG2   

  1. 1. College of Weaponry Engineering, Naval University of Engineering, Wuhan 430033, China
    2. College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China
  • Received:2021-09-07 Online:2022-10-26 Published:2022-10-29
  • Contact: Bo TANG

摘要:

将跳频体制信号引入鱼雷电磁引信能有效拓展引信工作带宽、提高抗干扰能力, 但如何选取备选频点、避免跳频频率与干扰冲突, 是目前仍需解决的问题之一。本文分析研究了跳频鱼雷电磁引信工作原理及干扰特性, 基于认知无线电技术的频谱管理思想设计了一种干扰感知策略, 提出一种基于多分辨率频谱感知算法的干扰感知技术方案, 并采用双门限判决方法解决了跳频鱼雷电磁引信背景干扰与随机干扰的同步检测问题, 设计了备选频点选取算法。仿真结果表明, 提出的技术方案能够有效实现干扰感知, 采用高斯函数作为母小波函数可在信噪比(signal to noise ratio, SNR)为5 dB时, 使最高检测概率达0.995;在SNR为-15 dB时, 最高虚警概率低于0.25;当SNR高于-5 dB时, 应对应答干扰和扫频干扰的跳频干扰冲突概率均低于0.05%。

关键词: 跳频, 电磁引信, 抗干扰, 频谱感知

Abstract:

Frequency hopping signal is introduced into electromagnetic fuze of torpedo as a result of a broader working bandwidth and a better anti-interference capability. Making a list of alternative frequency points without a collision between working frequency and interference is one of the issues still needed to be solved for the moment. Working principle of frequency hopping electromagnetic fuze of torpedo is analyzed and the characteristics of its interference is studied. An interference sensing strategy based on spectrum management of cognitive radio technique is designed. A technical scheme on interference sensing based on multi-resolution spectrum sensing algorithm is proposed. The problem of background interference and random disturbance synchronous detecting in the frequency hopping electromagnetic fuze of torpedo is solved by using double-threshold judging method. A algorithm for hopping frequency selection is designed. Simulation results show that the technical scheme proposed is capable of interference sensing with a maximum detecting probability up to 0.995 at signal to noise ratio (SNR) 5 dB and a minimum false alarm probability below 0.25 at SNR -15 dB, using Gauss function as its wavelet function of the algorithm. In addition, the collision probabilities between frequency hopping and interference are both less than 0.05% as SNR above -5 dB while against reply interference and sweeping frequency interference.

Key words: frequency hopping, electromagnetic fuze, anti-interference, spectrum sensing

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