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Air vehicle target recognition with jammer nulling adaptive waveforms in cognitive radar using high-fidelity RCS responses

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Author
Tan, Q. Jeanette
Romero, Ric
Date
2018
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Abstract
In this paper, we introduce two new jammer nulling transmit-adaptive waveforms applied to cognitive radar (CRr) framework for air vehicle (or aircraft) target response recognition in the presence of narrowband jammer noise and AWGN. The jammer nulling adaptive waveforms function as a countermea- sure against narrowband jamming signals that disrupts the CRr platform’s ability to classify the targets accurately when utilizing jammer-uncompensated adaptive waveforms. The jam- mer nulling waveforms are derived based on optimizing signal- to-interference-plus-noise-ratio (SINR) and mutual information (MI) metrics; while the adaptive waveforms are obtained by the jammer incorporated probability-weighted energy (PWE) or probability-weighted spectral density (PWSD) method. High- fidelity EM simulated radar cross section (RCS) responses of aircraft targets are utilized to investigate the performance of jammer nulling adaptive waveforms. The results from simula- tions show an improvement in jamming nulling SINR and MI- based waveforms’ classification performance over their jammer- uncompensated counterparts and the receive-adaptive wideband pulsed waveform. The increase in classification performance depends on the target frequency responses and the narrowband jammer spectrum profile.
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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/10945/63120
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