This research investigates the linear frequency modulation (LFM) of a stochastic radar waveform. We hypothesize that the properties of this type of waveform make it suitable for serving as a moving target indication (MTI) waveform, a secure waveform for radio frequency (RF)-based applications, and a robust waveform against co-channel interference (CCI). We advance the current state of the art for radar waveforms by showing that the waveform ( 1) is not low probability of detection, (2) is low probability of interception, (3) retains useful chirp and stochastic waveform characteristics, (4) is mismatched to communications signals where immunity to co-channel interference is achieved, and (5) offers advantages over conventional chirp and stochastic waveform. The first chapter of the dissertation presents the problem statement, and presents why detection capability, security, and robustness to interference of radar waveforms needs further exploration. The second chapter of the dissertation presents a review of advanced radar systems, focusing on pulse compression and stochastic waveforms, and discussing their mechanics and signal processing. The third chapter of the dissertation begins with a definition of the signal basis for the proposed waveform, and introduces the idea of using LFM on a stochastic waveform. The claims made in the hypothesis are analyzed, and graphical results from computer simulations are presented. The fourth chapter of the dissertation provides a numerical evaluation of the proposed waveform using the measured sidelobe power to determine the range and detection performance as compared to both conventional chirp and purely stochastic waveforms for the case when interference is and is not present. The fifth chapter of the dissertation presents a discussion of the results from the analysis and numerical evaluations of the proposed waveform. The properties observed in the results are compared to those expected as stated in the hypothesis. The sixth chapter of the dissertation consolidates conclusions drawn from the research, including recommendations for both system design and future work based on the results. Lastly, we discuss future work relating to the research.
|Commitee:||Guo, Yi, Kosinski, John, Man, Hong, Xu, Frank|
|School:||Stevens Institute of Technology|
|School Location:||United States -- New Jersey|
|Source:||DAI-B 72/10, Dissertation Abstracts International|
|Keywords:||Chirp radar waveform, Co-channel interference (cci), Linear frequency modulation (lfm), Low probability of intercept (lpi), Matched filter, Stochastic radar waveform|
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