Mobility modeling and estimation for delay tolerant unmanned ground vehicle networks

Approved for public release; distribution is unlimited === An ad hoc unmanned ground vehicle (UGV) network operates as an intermittently connected mobile delay tolerant network (DTN). The path planning strategy in a DTN requires mobility estimation of the spatial positions of the nodes as a function...

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Main Author: Beach, Timothy M.
Other Authors: Thulasiraman, Preetha
Published: Monterey, California: Naval Postgraduate School 2013
Online Access:http://hdl.handle.net/10945/34624
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spelling ndltd-nps.edu-oai-calhoun.nps.edu-10945-346242014-12-11T04:02:48Z Mobility modeling and estimation for delay tolerant unmanned ground vehicle networks Beach, Timothy M. Thulasiraman, Preetha Clark, Grace Electrical And Computer Engineering Approved for public release; distribution is unlimited An ad hoc unmanned ground vehicle (UGV) network operates as an intermittently connected mobile delay tolerant network (DTN). The path planning strategy in a DTN requires mobility estimation of the spatial positions of the nodes as a function of time. The purpose of this thesis is to create a foundational mobility estimation algorithm that can be coupled with a cooperative communication routing algorithm to provide a basis for real time path planning in UGV-DTNs. In this thesis, we use a Gauss-Markov state space model for the node dynamics. The measurements are constant power received signal strength indicator (RSSI) signals transmitted from fixed position base stations. An extended Kalman filter (EKF) is derived for estimating of coordinates in a two-dimensional spatial grid environment. Simulation studies are conducted to test and validate the models and estimation algorithms. We simulate a single mobile node traveling along a trajectory that includes abrupt maneuvers. Estimation performance is measured using zero mean whiteness tests on the innovations sequences, root mean squared error (RMSE) of the state estimates, weighted sum squared residuals (WSSRs) on the innovations, and the posterior Cramer-Rao lower bound (PCRLB). Under these performance indices, we demonstrate that the mobility estimator performs effectively. 2013-08-01T16:51:22Z 2013-08-01T16:51:22Z 2013-06 http://hdl.handle.net/10945/34624 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, it may not be copyrighted. Monterey, California: Naval Postgraduate School
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sources NDLTD
description Approved for public release; distribution is unlimited === An ad hoc unmanned ground vehicle (UGV) network operates as an intermittently connected mobile delay tolerant network (DTN). The path planning strategy in a DTN requires mobility estimation of the spatial positions of the nodes as a function of time. The purpose of this thesis is to create a foundational mobility estimation algorithm that can be coupled with a cooperative communication routing algorithm to provide a basis for real time path planning in UGV-DTNs. In this thesis, we use a Gauss-Markov state space model for the node dynamics. The measurements are constant power received signal strength indicator (RSSI) signals transmitted from fixed position base stations. An extended Kalman filter (EKF) is derived for estimating of coordinates in a two-dimensional spatial grid environment. Simulation studies are conducted to test and validate the models and estimation algorithms. We simulate a single mobile node traveling along a trajectory that includes abrupt maneuvers. Estimation performance is measured using zero mean whiteness tests on the innovations sequences, root mean squared error (RMSE) of the state estimates, weighted sum squared residuals (WSSRs) on the innovations, and the posterior Cramer-Rao lower bound (PCRLB). Under these performance indices, we demonstrate that the mobility estimator performs effectively.
author2 Thulasiraman, Preetha
author_facet Thulasiraman, Preetha
Beach, Timothy M.
author Beach, Timothy M.
spellingShingle Beach, Timothy M.
Mobility modeling and estimation for delay tolerant unmanned ground vehicle networks
author_sort Beach, Timothy M.
title Mobility modeling and estimation for delay tolerant unmanned ground vehicle networks
title_short Mobility modeling and estimation for delay tolerant unmanned ground vehicle networks
title_full Mobility modeling and estimation for delay tolerant unmanned ground vehicle networks
title_fullStr Mobility modeling and estimation for delay tolerant unmanned ground vehicle networks
title_full_unstemmed Mobility modeling and estimation for delay tolerant unmanned ground vehicle networks
title_sort mobility modeling and estimation for delay tolerant unmanned ground vehicle networks
publisher Monterey, California: Naval Postgraduate School
publishDate 2013
url http://hdl.handle.net/10945/34624
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