Imaging Method To Detect Low Probability of Intercept Radars

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Hejazi Kookamari, Farzam | 2017

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Type of Document: Ph.D. Dissertation
Language: Farsi
Document No: 50915 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Nayebi, Mohammad Mahdi; Norouzi, Yaser
Abstract:
In this thesis, a new passive method suitable for Geolocating LPI radars is introduced. The method uses two Electronic Support (ES) receivers placed on a fast moving platform (e.g., an airplane or a satellite). The proposed method has a high processing gain, which makes it highly suitable for very weak LPI signals. The processing gain of the method was analytically derived and illustrated with simulation to determine if the proposed method can detect LPI radars in much lower SNRs compared to regular time-frequency LPI detection methods. Also, the resolution of the proposed method in both range and cross-range direction in radar location finding was analyzed. Furthurmore, the effect of the aircraft movements on the proposed method performance is discussed and a modification to compensate for unwanted motions is introduced. The simulation results, showed that the method is capable of radar location finding for complex radars and in complicated electromagnetic environments
Keywords:
Time Frequency Transform ; Electronic Support Measure ; Airborne Radar ; Short Time Fourier Transform ; Low Probability of Intercept (LPI) Radar ; Emitter Location Finding

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