Interference of ultra-wideband short electromagnetic pulses of high repetition frequency to GPS receiver
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摘要: 超宽谱短电磁脉冲的频谱可覆盖GPS工作频带，对GPS接收机的正常工作存在干扰威胁。从理论分析、数值仿真和实验方面研究了高重频超宽谱短电磁脉冲对GPS接收机干扰效果与脉冲参数之间的依赖关系。结果表明：若脉冲重复频率整数倍能落入GPS接收机工作频带内，高重频超宽谱短电磁脉冲对GPS接收机干扰效果较强，且达到相同干扰效果时所需脉冲幅值随重频增大而等比例减小，即脉冲幅值与重频乘积保持为常数；若重频整数倍偏离GPS接收机工作频带，高重频超宽谱短电磁脉冲对GPS接收机干扰效果不明显。Abstract: As the frequency spectrum of ultra-wideband(UWB) short electromagnetic pulses can cover the GPS frequency band, it can make threat to GPS receiver. The relationships between interference effects and parameters of UWB short electromagnetic pulses of high pulse repetition frequency(PRF) are studied from the aspects of theoretical analysis, numerical simulation and experimentation. The results show that if an integer multiple of PRF can fall into the GPS frequency band, the UWB short electromagnetic pulses will make strong interference effects on GPS receivers, and the pulse amplitude required to achieve the same interference effects is reducing in proportion to the PRF increasing, namely the product of pulse amplitude and PRF is constant；otherwise the interference effects will be unconspicuous.
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Key words:
- GPS /
- interference /
- ultra-wideband /
- pulse repetition frequency
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