FM信号单音干扰效果评估方法

李蓬勃; 窦峥; 李超

doi:10.11884/HPLPB201830.170427

FM信号单音干扰效果评估方法

doi: 10.11884/HPLPB201830.170427

哈尔滨工程大学信息与通信工程学院, 哈尔滨 150001

基金项目:

国家自然科学基金项目 61301095

国家自然科学基金项目 61603239

详细信息

作者简介:
李蓬勃(1995－)，女，硕士，从事认知电子战研究；lpb_2017@163.com

中图分类号: TN97
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- 被引次数: 0
出版历程
- 收稿日期: 2017-11-01
- 修回日期: 2017-11-29
- 刊出日期: 2018-03-15

Evaluation method of single-tone interference effect of FM signal

College of Information and Communication Engineering, Harbin Engineering University, Harbin 150000, China

摘要

摘要: FM信号受单音干扰时，有时无法获取干扰信号信息，但易获取输入信号和输出信号信息。提出将均方误差公式进行改进，并与干信比这一指标相关联，间接对FM信号进行单音干扰效果评估的方法。首先，建立了FM信号仿真模型，分析了不同信噪比下FM解调信号的波形失真情况；其次，分析了FM调制信号受到单音干扰时，在不同干信比下FM解调信号的波形失真情况；然后，用均方误差公式来表示模拟信号失真度，分析其与干信比的变化曲线，并对均方误差公式进行改进，仿真研究后得到新的评估指标；最后，分析了新评估指标与干信比和占空比的关系。
- 干扰效果评估 /
- FM信号 /
- 干信比 /
- 单音干扰 /
- 均方误差
Abstract: Sometimes we can not obtain the interference signal information, but can easily obtain the input signal and output signal information when FM signal has got single-tone interference. So we propose to modify the mean square error and make it be associated with jamming to signal ratio(JSR), then we evaluate indirectly the FM signal single-tone interference. First, we establish the simulation model of FM signal and analyze distortion of FM demodulated signal under different SNR and different JSR. And we analyze the relation between JSR and mean square error which is used to express analog signal distortion. Then we modify the formula of the mean square error and obtain the new evaluation index after the simulation. Finally, we analyze the relation among the new evaluation index, the JSR and the duty cycle and get the conclusion.
- evaluation of interference effects /
- FM signal /
- jamming to signal ratio /
- single-tone interference /
- mean square error

HTML全文

图 1 通信信号干扰效果评估方法分类示意图

Figure 1. Classification of interference evaluated methods of communication signals

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图 2 不同信噪比下解调信号的时域波形图

Figure 2. Time-domain waveform of demodulated signal at different SNR

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图 3 不同干信比下的调制信号功率谱密度图

Figure 3. Power spectrum density of demodulated signal at different R_JS

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图 4 不同干信比下原始信号与解调信号的时域波形对比图

Figure 4. Time-domain waveform of original signal and demodulated signal at different JSR

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图 5 干信比为0 dB附近原始信号与解调信号的时域波形对比图

Figure 5. Time-domain waveform of original signal and demodulated signal when R_JS is near 0 dB

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图 6 不同信噪比下干扰效果评估指标I₁随干信比变化图

Figure 6. Map of evaluated index I₁ of interference effects with R_JS at different R_SN

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图 7 不同信噪比下干扰效果评估指标I₂随干信比变化图

Figure 7. Map of evaluated index I₂ of interference effects with R_JS at different R_SN

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图 8 不同信噪比下干扰效果评估指标I₃随干信比变化图

Figure 8. Map of evaluated index I₃ of interference effects with R_JS at different R_SN

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图 9 不同信噪比干扰效果评估指标I₃与干信比和占空比的关系图

Figure 9. Map of evaluated index I₃ of interference effects with R_JS and duty cycle at different R_SN

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图 10 干信比为-20 dB时不同信噪比下I₃与占空比的关系图

Figure 10. Relation between I₃ and duty cycle at different R_SN when R_JS is -20 dB

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