FSK调制系统的干扰对抗效果

马雅楠; 王建; 范广腾; 曹璐

doi:10.13700/j.bh.1001-5965.2023.0007

FSK调制系统的干扰对抗效果

doi: 10.13700/j.bh.1001-5965.2023.0007

军事科学院国防科技创新研究院，北京 100071

基金项目: 国家自然科学基金(62301590,61801503)

详细信息

通讯作者:
E-mail：wangjian710108@126.com

中图分类号: V443.1；TN975
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出版历程
- 收稿日期: 2023-01-04
- 录用日期: 2023-03-10
- 网络出版日期: 2023-05-06
- 整期出版日期: 2025-02-28

Countermeasure effect of jamming to FSK modulation system

National Innovation Institute of Defense Technology，Academy of Military Sciences，Beijing 100071，China

Funds: National Natural Science Foundation of China (62301590,61801503)

More Information

Corresponding author: E-mail：wangjian710108@126.com

摘要

摘要:
针对卫星通信面临的不同类型的干扰，以频移键控(FSK)调制通信信号为研究对象，重点对单音、多音、窄带、多音窄带、噪声调幅、噪声调频、噪声调相、线性调频、脉冲干扰9种干扰对抗条件下的误码率与信干比之间的关系进行研究。通过仿真提供了不同频偏、不同信干比情况下，不同干扰样式对FSK调制传输系统的恶化程度，并得出最佳干扰样式，同时给出了不同频偏、不同干扰样式情况下实现通信阻断（误码率大于10⁻²）需要的最高信干比。当信干比小于0 dB时，单音干扰和噪声调频干扰对系统恶化程度更严重；当信干比大于0 dB时，噪声调频干扰、多音窄带干扰和脉冲干扰具有更好的干扰效果。在不同频偏情况下实现通信阻断，脉冲干扰付出的功率代价最小。
- 电子对抗 /
- 频移键控 /
- 信干比 /
- 误码率 /
- 干扰效果
Abstract:
In view of the different types of jamming faced by satellite communication, frequency-shift keying (FSK) modulated communication signal was taken as the research object, and the relationship between the bit error rate and the signal-to-jamming ratio was mainly studied under the nine countermeasure conditions of jamming, such as single-tone, multi-tone, narrowband, multi-tone narrowband, noise amplitude modulation, noise frequency modulation, noise phase modulation, linear frequency modulation jamming, and pulse jamming. The deterioration degree of the FSK modulated communication system with different types of jamming in the case of different frequency biases and signal-to-jamming ratios was obtained through simulation, and the optimal jamming type was obtained. At the same time, the maximum signal-to-jamming ratio required to block communication (with a bit error rate greater than 10⁻²) under different frequency biases and different types of jamming was obtained. When the signal-to-jamming ratio was less than 0 dB, the single-tone jamming and noise frequency modulation jamming caused more serious system deterioration. When the signal-to-jamming ratio was greater than 0 dB, the noise frequency modulation jamming, the multi-tone narrowband jamming, and the pulse jamming exhibited better jamming effect. In the case of different frequency biases, the pulse jamming required the minimum power to block communication.
- electronic countermeasure /
- frequency-shift keying /
- signal-to-jamming ratio /
- bit error rate /
- jamming effect

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图 1 2FSK信号时域波形

Figure 1. Time-domain waveform of 2FSK signal

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图 2 2FSK信号频域波形

Figure 2. Frequency-domain waveform of 2FSK signal

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图 3 信号传输和接收机解调框^[18,22]

Figure 3. Block of signal transmission and receiver demodulation^[18,22]

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图 4 单音干扰信号的时域波形和功率谱

Figure 4. Time-domain waveform and power spectrum of single-tone jamming signal

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图 5 多音干扰信号的时域波形和功率谱

Figure 5. Time-domain waveform and power spectrum of multi-tone jamming signal

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图 6 窄带干扰信号的时域波形和功率谱

Figure 6. Time-domain waveform and power spectrum of narrowband jamming signal

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图 7 多音窄带干扰信号的时域波形和功率谱

Figure 7. Time-domain waveform and power spectrum of multi-tone narrowband jamming signal

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图 8 噪声调频干扰信号的时域波形和功率谱

Figure 8. Time-domain waveform and power spectrum of noise frequency modulation jamming signal

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图 9 脉冲干扰信号的时域波形和功率谱

Figure 9. Time-domain waveform and power spectrum of pulse jamming signal

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图 10 线性调频干扰信号的时域波形和功率谱

Figure 10. Time-domain waveform and power spectrum of linear frequency modulation jamming signal

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图 11 噪声调幅干扰信号的时域波形和功率谱

Figure 11. Time-domain waveform and power spectrum of noise amplitude modulation jamming signal

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图 12 噪声调相干扰信号的时域波形和功率谱

Figure 12. Time-domain waveform and power spectrum of noise phase modulation jamming signal

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图 13 无频偏情况下FSK信号误码率随信干比的变化曲线

Figure 13. Change of bit error rate of FSK signal with signal-to-jamming ratio without frequency bias

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图 14 单音、多音、噪声调幅、噪声调相干扰情况下FSK信号误码率随信干比的变化曲线

Figure 14. Change of bit error rate of FSK signal with signal-to-jamming ratio under single-tone, multi-tone, noise amplitude modulation, and noise phase modulation jamming

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图 15 窄带、宽带、线性调频干扰情况下FSK信号误码率随信干比的变化曲线

Figure 15. Change of bit error rate of FSK signal with signal-to-jamming ratio under narrowband, wideband, and linear frequency modulation jamming

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图 16 多音、窄带、宽带、多音窄带干扰情况下FSK信号误码率随信干比的变化曲线

Figure 16. Change of bit error rate of FSK signal with signal-to-jamming ratio under multi-tone, narrowband, and multi-tone narrowband jamming

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图 17 多音窄带、噪声调频、脉冲干扰情况下FSK信号误码率随信干比的变化曲线

Figure 17. Change of bit error rate of FSK signal with signal-to-jamming ratio under multi-tone narrowband, noise frequency modulation, and pulse jamming

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表 1 不同频偏、不同信干比下的干扰样式优选方案

Table 1. Optimal jamming type selection scheme under different frequency biases and signal-to-jamming ratios

频偏/%	信干比/dB
频偏/%	<−10	−10～−5	−5～0	0～5	>5
0	单音	单音	单音	噪声调频	脉冲
<5	单音	单音	单音	噪声调频	脉冲
5～15	单音	单音	噪声调频	多音窄带	脉冲
5、12.5 （双载波）	噪声调频	噪声调频	噪声调频	噪声调频/脉冲	多音窄带/脉冲

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表 2 不同干扰样式在不同频偏下实现通信阻断的临界信干比

Table 2. Critical signal-to-jamming ratio required to block communication with different frequency biases and jamming types

干扰样式		临界信干比/dB
干扰样式		频偏为0	频偏<5%	频偏为 5%～15%	频偏为5%、12.5% （双载波）
单音		2.5	1.5	0.2	2.5
多音		2.2	2.2	2	4
窄带		8	6	5	6
多音窄带		7	6.5	6	6.5
噪声调频	斜率大	4.2	4.8	3.5	6.5
噪声调频	斜率小	6	5.5	1.8	6.5
脉冲	带宽小	10	7.5	6	8
脉冲	带宽大	4	1.5	1	2
线性调频		3	1.5	0.5	3
噪声调幅		2.5	1.5	0.2	2.5
噪声调相		2.5	1.5	0.2	2.5

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