Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels

The ability to provide position information of wireless emitters comprises a very important communication tool and has extremely valuable applications to military as well as civilian life. GSM is the most popular method of modulation adopted around the world, for mobile telephony. This thesis is foc...

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Main Author: Mantis, Spiros D.
Other Authors: Hippenstiel, Ralph D.
Format: Others
Published: Monterey, California. Naval Postgraduate School 2012
Online Access:http://hdl.handle.net/10945/2507
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spelling ndltd-nps.edu-oai-calhoun.nps.edu-10945-25072017-05-24T16:07:47Z Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels Mantis, Spiros D. Hippenstiel, Ralph D. Jenn, David C. Ha, Tri T. Naval Postgraduate School (U.S.) Electrical Engineering Systems Engineering The ability to provide position information of wireless emitters comprises a very important communication tool and has extremely valuable applications to military as well as civilian life. GSM is the most popular method of modulation adopted around the world, for mobile telephony. This thesis is focused on the Time Difference Of Arrival (TDOA) estimation, applied to GSM signals, in noisy channels. Improvements in denoising, in conjunction with wavelet processing, are proposed for estimating the TDOA of signals received at two spatially separated sensors. Wavelet denoising based on a modified maximum likelihood method and a higher order moment method is proposed, to improve the performance. A numerical evaluation of the methods, when unequal SNR conditions prevail, is presented. The performance of the proposed denoising methods in a jamming environment is also addressed. Simple excision schemes to improve the performance when jamming is present, are evaluated. Simulation results indicate good performance of the methods and improved estimates relative to the ones obtained using no denoising. Jamming presence degrades the performance but still the extracted estimates are improved. Hellenic Navy author 2012-03-14T17:35:24Z 2012-03-14T17:35:24Z 2001-06 Thesis http://hdl.handle.net/10945/2507 258044 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted. xviii, 27 p. ; application/pdf Monterey, California. Naval Postgraduate School
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description The ability to provide position information of wireless emitters comprises a very important communication tool and has extremely valuable applications to military as well as civilian life. GSM is the most popular method of modulation adopted around the world, for mobile telephony. This thesis is focused on the Time Difference Of Arrival (TDOA) estimation, applied to GSM signals, in noisy channels. Improvements in denoising, in conjunction with wavelet processing, are proposed for estimating the TDOA of signals received at two spatially separated sensors. Wavelet denoising based on a modified maximum likelihood method and a higher order moment method is proposed, to improve the performance. A numerical evaluation of the methods, when unequal SNR conditions prevail, is presented. The performance of the proposed denoising methods in a jamming environment is also addressed. Simple excision schemes to improve the performance when jamming is present, are evaluated. Simulation results indicate good performance of the methods and improved estimates relative to the ones obtained using no denoising. Jamming presence degrades the performance but still the extracted estimates are improved. === Hellenic Navy author
author2 Hippenstiel, Ralph D.
author_facet Hippenstiel, Ralph D.
Mantis, Spiros D.
author Mantis, Spiros D.
spellingShingle Mantis, Spiros D.
Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels
author_sort Mantis, Spiros D.
title Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels
title_short Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels
title_full Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels
title_fullStr Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels
title_full_unstemmed Localization of wireless communication emitters using Time Difference of Arrival (TDOA) methods in noisy channels
title_sort localization of wireless communication emitters using time difference of arrival (tdoa) methods in noisy channels
publisher Monterey, California. Naval Postgraduate School
publishDate 2012
url http://hdl.handle.net/10945/2507
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