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