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Locating Unknown Wireless Devices Using Stimulated Emissions and the Fractional Fourier Transform
KTH, School of Information and Communication Technology (ICT).
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Unknown wireless devices that use receiver architectures with a mixer may be detected and located using stimulated emissions. Transmitting a known stimulation signal and correlating leaked mixer products allows measurement of the TOF and thus range. The FRFT improves the detection of the stimulated emissions by compressing the energy of the stimulated emissions to a single axis value. The stimulation signal has many parameters that may be optimized for maximum detection distance or minimum range error or somewhere in between. The primary limiting factor for the parameters is the processing time, as the algorithm to compute the discrete FRFT is computationally intensive at the time of this report. The tests performed in this investigation achieved 45+meters detection distance with < 3 meters of range error, with potential for farther detection distance.   

Place, publisher, year, edition, pages
2013. , 46 p.
Trita-ICT-EX, 2013:174
Keyword [en]
radar measurements, ranging, noncooperative receiver, counter-IED, fractional Fourier transform
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-128931OAI: diva2:648828
Educational program
Master of Science - Embedded Systems
Available from: 2013-09-17 Created: 2013-09-17 Last updated: 2013-09-17Bibliographically approved

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