Anti-Frequency Sweeping Jamming Method for FM Fuze Using Sliding Multi-cycle FFT

doi:10.12382/bgxb.2022.0119

Abstract

Abstract:

This study proposes a sliding multi-cycle fast Fourier transform (FFT) processing method to address the problem of poor performance of the FFT harmonic envelope extraction method used in FM fuze under frequency sweeping jamming conditions. The proposed method aims to achieve effective interference suppression by coherently accumulating echo energy through multi-period FFT processing. The processing data is updated by sliding between adjacent processing windows, and the difference frequency harmonic envelope corresponding to the predetermined blast height is further extracted for threshold judgment. The simulated and measured results show that compared with traditional single-cycle FFT processing method, the new method can effectively extract the target harmonic envelope characteristics under frequency sweeping jamming, significantly improve the peak-to-side lobe ratio, and enhance the anti-frequency sweeping jamming performance of FM fuze.

Key words: FM fuze, frequency sweeping jamming, coherent accumulation, harmonic envelope, peak-to-side lobe ratio

ZHOU Wen, HAO Xinhong, DONG Erwa, CHEN Yanjun. Anti-Frequency Sweeping Jamming Method for FM Fuze Using Sliding Multi-cycle FFT[J]. Acta Armamentarii, 2023, 44(6): 1744-1753.

Figures/Tables 15

Fig.1 Working mechanism of the FM fuze

Fig.2 Single-cycle FFT processing results

Fig.3 Frequency sweep jamming model

Fig.4 Failure mechanism under frequency sweeping jamming

Fig.5 Spectrum of beat signals under frequency sweeping jamming

Fig.6 Sliding multi-cycle FFT processing flow

Fig.7 Sliding multi-cycle FFT processing results

Table 1 Simulation parameters

参数	数值
调制频率/kHz	100
调制带宽/MHz	200
弹目距离/m	15~0
JSR/dB	15
扫频带宽/MHz	400

Fig.8 Single-cycle FFT processing results of simulation data

Fig.9 Sliding multi-cycle FFT processing results of simulated data

Fig.10 PSLR results of sliding multi-cycle FFT processing

Table 2 Calculation time required for different cycles

参数	Q
参数	1	2	4	8	16	32
数据长度/B	256	512	1024	2048	4096	8192
计算时间/ms	0.06	0.13	0.28	0.57	1.12	2.18

Fig.11 Schematic diagram of the test setup

Fig.12 Single-cycle FFT processing results of measured data

Fig.13 Sliding multi-cycle FFT processing results of measured data

References 20

[1]	崔占忠, 宋世和, 徐立新. 近炸引信原理[M]. 北京: 北京理工大学出版社, 2009:68-75.
	CUI Z Z, SONG S H, XUN L X. Principle of proximity fuze[M]. Beijing: Beijing Institute of Technology Press, 2009:68-75. (in Chinese)
[2]	赵惠昌. 无线电引信设计原理与方法[M]. 北京: 国防工业工业出版社, 2012:35-46.
	ZHAO H C. Principles and methods of radio fuze design[M]. National Defense Industry Press, 2012: 35-46. (in Chinese)
[3]	CHOI D Y, KIM W K, KIM J H, et al. Performance of analog and digital modulation schemes under sweep jamming[C]//Proceedings of the 2016 Eighth International Conference on Ubiquitous and Future Networks. Vienna, Austria: IEEE, 2016.
[4]	CHOI Y S, LEE S Y, CHOI H H, et al. The improved spatial nuller with frequency swept jammer[C]//Proceedings of 2014 IEEE/ION Position, Location & Navigation Symposium. Monterey, CA,US:IEEE, 2014.
[5]	金文, 武海东, 沙作金, 等. 无线电引信的抗干扰性能评估方法研究[J]. 制导与引信, 2020, 41(2):11-16.
	JIN W, WU H D, SHA Z J, et al. Research on anti-interference performance evaluation method of radio fuze[J]. Guidance & Fuze, 2020, 41(2):11-16. (in Chinese)
[6]	熊久良, 武占成, 孙永卫, 等. 无线电引信互扰效应规律研究[J]. 电波科学学报, 2015, 30(5):903-909.
	XIONG J L, WU Z C, SUN Y W, et al. Study on mutual interference effect of radio fuze[J]. Journal of Radio Science, 2015, 30(5):903-909. (in Chinese)
[7]	张星宇, 齐杏林, 李黎明. 国外无线电引信发展历程及未来研究方向综述[J]. 飞航导弹, 2021(12):152-157.
	ZHANG X Y, QI X L, LI L M. Review on the development history and future research direction of foreign radio fuze[J]. Aeronautical Missile, 2021(12):152-157. (in Chinese)
[8]	黄莹, 郝新红, 孔志杰, 等, 基于熵特征的调频引信目标与干扰信号识别[J]. 兵工学报, 2017, 38(2): 254-260. doi: 10.3969/j.issn.1000-1093.2017.02.007
	HUANG Y, HAO X H, KONG Z J, et al. Target and jamming signal recognition of FM fuze based on entropy feature[J]. Acta Armamentarius, 2017, 38(2):254-260. (in Chinese)
[9]	DAI J, HAO X H, LI Z, et al. Adaptive target and jamming recognition for the pulse doppler radar fuze based on a time-frequency joint feature and an online-updated naive bayesian classifier with minimal risk[J]. Defence Technology, 2021, 18(3):457-466. doi: 10.1016/j.dt.2021.02.008 URL
[10]	岳凯, 郝新红, 栗苹, 等. 基于分数阶傅里叶变换的线性调频引信定距方法[J]. 兵工学报, 2015, 36(5): 801-808. doi: 10.3969/j.issn.1000-1093.2015.05.006
	YUE K, HAO X H, LI P, et al. A range method for chirp fuze based on fractional Fourier transform[J]. Acta Armamentarii, 2015, 36(5): 801-808. (in Chinese) doi: 10.3969/j.issn.1000-1093.2015.05.006
[11]	DAI J, HAO X H, LIU Q, et al. Repeater jamming suppression method for pulse Doppler fuze based on identity recognition and chaotic encryption[J]. Defence Technology, 2020, 17(3): 1002-1012. doi: 10.1016/j.dt.2020.06.023 URL
[12]	黄海燕. 连续波无线电引信信号的识别[D]. 成都: 电子科技大学, 2014.
	HUANG H Y. Recognition of continuous wave radio fuze signal[D]. Chengdu: University of Electronic Science and Technology of China, 2014. (in Chinese)
[13]	孔志杰, 郝新红, 栗苹, 等. 基于时序及相关检测的调频引信抗扫频干扰方法[J]. 兵工学报, 2017, 38(8):1483-1490. doi: 10.3969/j.issn.1000-1093.2017.08.004
	KONG Z J, HAO X H, LI P, et al. Anti-sweep interference method of FM fuze based on timing and correlation detection[J]. Acta Armamentarii, 2017, 38(8): 1483-1489. (in Chinese)
[14]	李志强. 连续波多普勒无线电引信目标信号识别方法研究[D]. 北京: 北京理工大学, 2014.
	LI Z Q. Research on target signal identification method of continuous Wave Doppler radio fuze[D]. Beijing: Beijing Institute of Technology, 2014. (in Chinese)
[15]	李泽, 闫晓鹏, 栗苹, 等. 扫频式干扰对调频多普勒引信的干扰机理研究[J]. 兵工学报, 2017, 38(9): 55-61.
	LI Z, YAN X P, LI P, et al. Jamming mechanism of frequency sweep jamming to FM doppler fuze[J]. Acta Armamentarii, 2017, 38(9): 55-61. (in Chinese)
[16]	夏彩杰, 王爱华, 安建平. 扫频干扰的自适应时变抑制研究[J]. 计算机工程, 2008, 34(4): 37-39. doi: 10.3969/j.issn.1000-3428.2008.04.013
	XIA C J, WANG A H, AN J P. Research on adaptive time-varying suppression of frequency sweeping interference[J]. Computer Engineering, 2008, 34(4): 37-39. (in Chinese) doi: 10.1007/s00366-017-0519-9 URL
[17]	ALLOND S, STARK W, ALI M, et al. Interference in Automotive Radar Systems: Characteristics, mitigation techniques, and current and future research[J]. IEEE Signal Processing Magazine, 2019, 36(5):45-59. doi: 10.1109/MSP.79 URL
[18]	陈齐乐, 郝新红, 闫晓鹏, 等. 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[J]. 北京航空航天大学学报, 2020(7):1317-1324.
	CHEN Q L, HAO X H, YAN X P, et al. Anti sweep jamming method of hybrid modulation fuze based on harmonic coefficient amplitude averaging[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020(7):1317-1324. (in Chinese)
[19]	SALEH M, OMAR S M, GRIVEL E, et al. A modified stepped frequency phase coding radar waveform designed for the frequency domain algorithm[J]. Digital Signal Processing, 2019, 88:116-129. doi: 10.1016/j.dsp.2019.01.004 URL
[20]	JI J, ZHENG S L, ZHANG X M. Pre-distortion compensation for optical-based broadband LFM signal generation system[J]. Optics Communications, 2019, 435:277-282. doi: 10.1016/j.optcom.2018.11.059 URL