Abstract: A system for hands-free access to a vehicle includes a hands-free access device that transmits a location frame of a modulated signal and a pure carrier signal, receives a measurement of a received signal strength of a primary received signal performed on the pure carrier signal by a hands-free identifier, and receives information on an absence or presence of noise in the location frame. Additionally, the hands-free access device authorizes or prevents access to the vehicle. The system further includes a hands-free identifier that receives the location frame, performs a measurement of the received signal strength of the primary received signal on the pure carrier signal, sends the hands-free access device the measurement of the received signal strength of the primary received signal, checks the presence of noise in the location frame, and sends the hands-free access device information on the absence or presence of noise in the location frame.

Abstract: The invention relates to a system for hands-free access (1) to a vehicle (2), comprising: —a hands-free access device (20) configured to: —transmit a location frame (2a) comprising a modulated signal (20a) and a pure carrier signal (21a); —receive a measurement of the received signal strength of a primary received signal (RSSI1) performed on said pure carrier signal (21a) by a hands-free identifier (10); —receive information (1a) on the absence or presence of noise (22a) in said location frame (2a); —depending on said measurement of the received signal strength of a primary received signal (RSSI1) and on said information (1a) on the absence or presence of noise (22a), authorize or prevent access to said vehicle (2); —a hands-free identifier (10) configured to: —receive said location frame (2a); —perform a measurement of the received signal strength of a primary received signal (RSSI1) on said pure carrier signal (21a); —send said hands-free access device (20) said measurement of the received signal strength o