Study on the effect of satellite navigation receiver under out-of-band electromagnetic interference
Aiming at the phenomenon of satellite tracking loss of the navigation receiver out-of electromagnetic interference,a certain type of navigation receiver is taken as the research object,and the continuous wave electromagnetic interference injection effect experiment is carried out,and the sensitivity threshold curve of the navigation receiver in the presence of electromagnetic interference is obtained.By using advanced design system(ADS)circuit simulation software to build the radio frequency(RF)front-end circuit of the navigation receiver,the simulation analysis results show that the secondary channel interference generated by out-of-band electromagnetic interference is the main reason for the loss of satellite tracking.At the same time,through mathematical model analysis and experiment verification method,it is known that the effect mechanism of low harmonic sensitive frequency band is related to the low noise amplifier of RF front-end,which has certain guiding significance for improving the ability of the navigation receiver to resist out-of-band electromagnetic interference.
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