LOCATION ESTIMATION METHOD BASED ON DIRECTION FINDING USING TDOA OF SIGNAL AND DIRECTION FINDER THEREOF

摘要

The present invention relates to a direction detecting apparatus capable of detecting a position of a signal source without causing a position estimation ambiguity and a method of estimating a position of the signal source, and a method of estimating a position based on a direction detection according to an embodiment of the present invention, Calculating arrival angles (DOA) which are six direction detection information based on three arrival time differences (TDOA) which are time difference information of an arrival signal; Grouping eight directions detection information by combining the six direction detection information with a condition; Calculating a position estimate and residuals of eight signal sources by applying a least squares method to each of the eight grouped direction detection information; Confirming that the estimated position of the signal source is valid using the estimated position of the signal source and the relationship between the arrival angles in the ascending order of the residuals; Selecting a position estimate value of the signal source having the smallest residual among the positional values of the estimated signal source comparing the relationship with the arrival angles and determining a position estimate value of the selected signal source as the position of the signal source . / RTI