详情

原文传递 Comparing Time-Based and Hybrid Time-Based/Frequency Based Multi-Platform Geo-Location Systems

题名：	Comparing Time-Based and Hybrid Time-Based/Frequency Based Multi-Platform Geo-Location Systems
作者：	Stewart, Andrew D.;
关键词：	COMPUTERIZED SIMULATION, GLOBAL POSITIONING SYSTEM, ALGORITHMS, SIGNAL PROCESSING, SCENARIOS, STOCHASTIC PROCESSES, DATA MANAGEMENT, INFORMATION TRANSFER, TIME DEPENDENCE, DIRECTION FINDING, THESES, RADIO TRANSMITTERS, CROSS CORRELATION, DOPPLER EFFECT.
摘要：	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, sensor network to target geometry dominates both solutions' accuracy. While solution accuracy is used as the primary method of effectiveness, the distribution of each solution's uncertainty is also compared. Finally, the simulation itself remains a useful tool for further system design experimentation, performance indication, and as a means to describe system capabilities to the war fighter.
总页数：	114
报告类型：	科技报告