COHERENT JAMMER MITIGATION USING TRANSMIT WAVEFORM-TARGET RESPONSE MATCHED FILTER WITH LFM AND FRANK-CODED WAVEFORM
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Authors
Albuquerque, Heitor
Subjects
electronic warfare
radar
electronic support
electronic attack
electronic protection
jammer
coherent jammer
digital radio frequency memory
radar waveforms
matched filter
radar cross section
target detection
false targets
false detection rate
transmit waveform-target response
deconvolution
radar
electronic support
electronic attack
electronic protection
jammer
coherent jammer
digital radio frequency memory
radar waveforms
matched filter
radar cross section
target detection
false targets
false detection rate
transmit waveform-target response
deconvolution
Advisors
Romero, Ric
Date of Issue
2019-09
Date
September 2019
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
In the electronic warfare (EW) scenario, an electronic support (ES) system is usually at an advantage
against a radar because it can potentially intercept the radar signal beyond the maximum range of interest of
the radar. In this study, we consider the case in which the enemy target is within the maximum range of the
radar. The enemy ES system intercepts the radar emission. To confuse the radar, the ES system utilizes an
electronic attack (EA) technique called coherent jammer (CJ), which tries to place false targets in the radar
output displays. We utilize the target signature to develop the transmit waveform-target response (TWTR)
matched filter that helps to discriminate the true target from the CJ signals. We utilize well-known radar
signals, such as linear frequency modulation (LFM) and Frank-coded waveforms. We perform
electromagnetic (EM) simulations with a computer-aided design (CAD) tool called Computer Simulation
Technology (CST) to generate backscattered signals from targets. We perform MATLAB simulations to
evaluate the performance of the TWTR matched filter technique. Monte Carlo simulations show that the
technique significantly reduces the false detection rate (FDR) caused by CJs. Experiments are performed
with actual unmanned aerial vehicles or drones to extract target responses and to evaluate the mitigation of
the FDR with the measured target signature.
Type
Thesis
Description
Series/Report No
Department
Electrical and Computer Engineering (ECE)
Organization
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Format
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Approved for public release; distribution is unlimited.
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