System for controlling right of access to a vehicle

Abstract

A system for verifying the access authorization to a vehicle has a vehicle-based transceiver unit (E) which has at least two transmitting/receiving antennas spaced a distance apart in or on the vehicle, and it has a transponder unit (T) which is set up for detection of its presence and for exchanging a predetermined identification request/response sequence through or with the transceiver unit (E) within a predetermined detection area in or around the vehicle (F), wherein the transceiver unit (E) has calculation/analyzing means which perform the detection of a position of the transponder unit (T) by using a time and/or phase measurement based on a mathematical geometric method in response to a reply signal transmitted by the transponder (T) and received by the at least two transmitting/receiving antennas (El, E2, E3) in response to the identification request.

Dependencies are inferred from the claim text.