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Reactive jamming is not only cost effective, but also hard to track and remove due to its intermittent jamming behaviors. Frequency Hopping Spread Spectrum (FHSS) and Direct Sequence Spread Spectrum (DSSS) have been widely used to defend against jamming attacks. However, both will fail if the jammer jams all frequency channels or has high transmit power. In this paper, the authors propose BitTrickle, an anti-jamming wireless communication scheme that allows communication in the presence of a broadband and high power reactive jammer by exploiting the reaction time of the jammer. They develop a prototype of BitTrickle using the USRP platform running GNURadio.
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