English

Comparing time-based and hybrid time-based/frequency based multi-platform geo-location systems

Thesis advisor(s): Arnold H. Buss · "September 1997." · Thesis (M.S. in Operations Research)--Naval Postgraduate School, September. 1997 · Includes bibliographical references (p. 95-96) · While time difference of arrival (TDOA) information is sufficient to passively solve for the location of a radio frequency transmitter, frequency difference of arrival (FDOA) information may be added to the TDOA information to solve for both the position and velocity of the transmitter. This analysis implements a stochastic discrete event simulation, written in Java, to compare and stochastically describe, under a variety of conditions, the differences between a mixed TDOA/FDOA Multi-platform Global Positioning System (GPS) assisted Geo-location System and that of the same system which uses TDOA information only. The presented analysis compares beth solution types for two- and three-dimensional fixes across: various measurement error distributions and correlation values, sensor network geometry, and sensor platform selection. The simulation results show first order stochastic dominance in the accuracy of the TDOA/FDOA solution in the two-dimensional scenarios. In the three-dimensional scenarios, s

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