METHOD FOR LOCATING THE BADGE OF A HAND-FREE SYSTEM AND HAND-FREE SYSTEM FOR ACCESSING A VEHICLE IMPLEMENTING SAID METHOD

摘要

The invention relates to a method for locating a badge (2) of a hand-free system (1) of a motor vehicle in an area covered by at least three antennas (a, b, c) associated with an on-board device (10) for controlling the hand-free system, which includes the following steps: transmitting a wake-up signal (3) using at least one of said antennas (a, b, c) for waking up said badge (2) when present in said area; transmitting a predetermined sequence of location signals (31, 32, 33) using said antennas (a, b, c), each antenna transmitting a location signal of the sequence during sequential time intervals; measuring the level (41, 42, 43) of each location signal (31, 32, 33) received by the badge (2) during said sequential time intervals; transmitting by means of said badge (2) the results of the level measurement (41, 42, 43) to the on-board control device (10); determining by means of the on-board control device (10) the presence of an interference signal (4) in said area from said measurement results (41, 42, 43). The invention also relates to a hand-free system for implementing said method.