SYSTEM AND METHOD OF ESTIMATION OF TIME OF ARRIVAL

摘要

A system and method for accurately determining time of arrival using a mathematical model that mimics a correlation function. A correlation value i s sampled at a predetermined periodic interval and a maximum correlation value , coinciding with a particular point in time, is determined. The mathematical model uses the maximum measured correlation value and correlation values at adjacent sample points to determine coefficients for the selected mathematic al model. The coefficients may be calculated and used to determine the actual peak, which may fall in-between the sample points. The actual peak value is used to accurately determine the time of arrival of a signal. Time of arriva l signals from a plurality of remote transmitters are used along with conventional triangulation techniques to accurately determine the location o f the wireless unit.