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INNOVATIVE ELECTROMAGNETIC PROTECTION TECHNIQUES AGAINST ADVANCED JAMMING WAVEFORM THREATS

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Author
Feltes, Alexandra
Date
2021-06
Advisor
Romero, Ric
Second Reader
Jenn, David C.
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Abstract
In this thesis, we develop electromagnetic protection (EP) receiver techniques to mitigate the false alarm probability and detection effects generated by transmit waveform shaped noise jammers (TWS-NJs) and deceptive coherent jammers (CJs). Unlike traditional wideband NJ (WB-NJ) and narrowband NJ (NB-NJ) that produce spectral densities almost uniformly distributed across their respective bandwidths, a TWS-NJ assumes apriori knowledge of a signal spectral shape, thereby utilizing the waveform dominant bands in generating jammer noise. While noise jammers produce a significant number of false targets, CJs manipulate and retransmit the received signal to generate a few false targets in the victim receiver. For illustration in this thesis, we utilize the basic rectangular and Hamming pulses as transmit waveforms to evaluate the detection performance effects of the TWS-NJ and CJ waveforms. The bandwidths of the TWS-NJs are parameterized to reflect the effect of practical narrowband constraints. The performance effect of various jammers, including the TWS eigenjammer, on detection performance is also investigated. To mitigate the TWS-NJs, we develop an adaptive matched filter and evaluate performance improvement. To mitigate the CJ, we develop a non-coherent EP matched filter and evaluate false detection rate improvement.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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http://hdl.handle.net/10945/70789
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