An evaluation of the radio frequency susceptibility of commercialGPS receivers |
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Authors: | Daher JK Harris JM Wheeler ML |
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Institution: | Sensors & Electromag. Applic. Lab., Georgia Tech. Res. Inst., Atlanta, GA; |
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Abstract: | The radio frequency (RF) susceptibility characteristics of two commercial Global Positioning System (GPS) receivers were evaluated. A first-order analysis was performed to predict the receiver susceptibility thresholds based on the receiver sensitivity and processing gain. The receiver susceptibility thresholds in the post-acquisition mode were then measured for various interference signal frequencies and modulations. Both receivers exhibited very low susceptibility thresholds to in-band continuous wave (CW) signals. In addition, both receivers could be over-driven with an out-of-band signal. In this state the receivers indicated acceptable figures of merit despite loss of satellite signal lock |
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