基于谐波系数幅值平均的复合调制引信抗扫频式干扰方法

陈齐乐; 郝新红; 闫晓鹏; 乔彩霞; 王雄武

doi:10.13700/j.bh.1001-5965.2019.0451

基于谐波系数幅值平均的复合调制引信抗扫频式干扰方法

doi: 10.13700/j.bh.1001-5965.2019.0451

北京理工大学机电学院, 北京 100089

基金项目:

国家自然科学基金 61871414

国家“973”计划 613196

详细信息

作者简介:
陈齐乐  男, 博士研究生。主要研究方向:无线电引信信号处理技术

郝新红  女, 博士, 副教授, 博士生导师。主要研究方向:中近程探测及控制技术、引信抗干扰技术

闫晓鹏  男, 博士, 副教授, 博士生导师。主要研究方向:电子对抗技术、引信干扰技术

乔彩霞  女, 硕士研究生。主要研究方向:无线电引信目标特征识别技术

王雄武  男, 硕士研究生。主要研究方向:无线电引信抗干扰技术

通讯作者:
郝新红, E-mail: haoxinhong@bit.edu.cn

中图分类号: TJ43⁺4.1
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出版历程
- 收稿日期: 2019-08-20
- 录用日期: 2019-09-27
- 网络出版日期: 2020-07-20

Anti sweep jamming method of hybrid modulation fuze based on harmonic coefficient amplitude averaging

School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100089, China

Funds:

National Natural Science Foundation of China 61871414

National Basic Research Program of China 613196

More Information

Corresponding author: HAO Xinhong. E-mail:haoxinhong@bit.edu.cn

摘要

摘要:
为提高混沌码调相与线性调频（CCPM-LFM）复合调制无线电引信的抗扫频式干扰性能，分析了扫频式干扰作用下复合调制无线电引信的响应，并提出了谐波系数幅值平均的抗干扰方法。在瞬时相关和谐波解调串联（ICHD）定距算法原理的基础上，采用快速傅里叶变换（FFT）算法提取谐波包络，并对多次FFT所得谐波系数幅值平均，充分利用混沌码的随机性和统计特性抑制干扰。理论和仿真结果表明：所提方法在不影响引信定距精度的前提下，能够有效抑制扫频干扰。
- 无线电引信 /
- 抗干扰方法 /
- 复合调制 /
- 谐波系数 /
- 统计特性
Abstract:
To improve the anti sweep jamming performance of the Chaotic Codes Phase Modulation and Linear Frequency Modulation (CCPM-LFM) hybrid modulation radio fuze, the response of the CCPM-LFM fuze under sweep jamming was analysed, and an anti jamming method based on harmonic coefficient amplitude average was proposed. This method was based on the ranging principle of Instantaneous Correlation Harmonic Demodulation (ICHD), and the harmonic envelope extraction was realized by Fast Fourier Transform (FFT) algorithm. By averaging the harmonic coefficient amplitudes obtained from multiple times of FFT, this method took the advantage of the random and statistical characteristics of the chaotic codes, and the jamming was effectively suppressed. Theoretical and simulation results show that the method can effectively suppress the sweep jamming without affecting the ranging resolution of the fuze.
- radio fuze /
- anti jamming method /
- hybrid modulation /
- harmonic coefficient /
- statistical characteristics

HTML全文

图 1 复合调制引信原理框图

Figure 1. Functional block diagram of hybrid modulation fuze

下载: 全尺寸图片幻灯片

图 2 扫频式干扰效果示意图

Figure 2. Schematic of sweep jamming effectiveness

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图 3 基于谐波系数幅值平均的抗干扰方法原理

Figure 3. Schematic diagram of anti jamming method based on harmonic coefficient amplitude averaging

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图 4 定距算法仿真结果

Figure 4. Simulation results of ranging algorithms

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图 5 距离旁瓣抑制

Figure 5. Ranging sidelobe suppression

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图 6 扫频式干扰抑制

Figure 6. Sweep jamming suppression

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图 7 不同G值引信能够正常工作的最大SJR

Figure 7. Maximum SJR of fuse in normal work situation with different values of G

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图 8 G值对算法性能的影响

Figure 8. Effect of values of G on algorithm performance

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表 1 仿真参数

Table 1. Simulation parameters

参数	数值
载波频率f₀/MHz	300
调制频率f_m/kHz	25
调频带宽ΔF/MHz	50
码元宽度T_c/ns	50
引信同目标的初始距离R/m	15~0
弹目径向相对运动速度v₀/(m·s^-1)	500
输入信干比SJR/dB	-10
扫频起始/终止频率f_j0~f_jw/MHz	350~450
扫频点数N	100
扫频驻留时间T_dw/ms	1

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参考文献(16)

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