TOA/TDOA MODE GLOBAL PASSIVE LOCATION

摘要

The present invention relates to a solution to problems linked with the TOA mode (Time Of Arrival) or TDOA mode (Time Difference Of Arrival) passive location of targets. The TOA or TODA mode passive location of a target involves a meshing (division) into volumes of the space in which the location target is situated. The set of volumes defining this mesh is analysed in an iterative manner. At each iteration, each volume of interest is divided into sub-volumes of identical dimensions. According to the invention, a volume of interest is a volume including at least one point belonging to the searched location area whose shape has to be determined. The iterative process stops when the dimensions of the sub-volumes obtained a the current iteration corresponds to the desired resolution. The invention can particularly be used in 2D or 3D location systems including means for implementing TOA, TDOA or mixed modes.