Patent ID: 6693581
Filing Date: 2004-02-17
Classification: B60R,G01S,G07C,H01Q

Abstract:
A device for data transmission for at least one of in a first motor vehicle and from a second motor vehicle, comprising:a first transceiver unit located with the first motor vehicle, and being radar unit equipped for distance measurement that is expanded by adding a two-channel data transmission system; at least one transponder unit; and a second transceiver unit in the at least one transponder unit and being spatially positioned relative to the first motor vehicle one of arbitrarily and variably, the second transceiver unit being a two-channel data transmission unit; wherein microwave frequencies for two-channel communication are selected so that their difference yields an intermediate frequency that is processable in a heterodyne receiver in a reception part of each of the first transceiver unit and the second transceiver unit.