| 摘要 |
A wireless, in particular mobile, communication device ( 8 ) for communicating with communication units ( 9 ) in vehicles ( 5, 6, 7 ), comprising a transmitter ( 26 ) and a receiver ( 29 ) for information-containing electromagnetic waves, as well as a control unit ( 25 ) for controlling the transmitter ( 26 ), a directional characteristic ( 10, 10' ) being provided for the receiver ( 29 ) and/or for the transmitter ( 26 ), for a selective communication with communication units ( 9 ) in vehicles ( 5, 6, 7 ) at distances (D) of more than 10 m, preferably in the order of from 20 m to 200 m, e.g. in the order of approximately 100 m, in particular with a receiving angle, or a radiation angle, respectively, of from 0.5° to 4°, preferably 0.8° to 2.5°, and a sighting unit ( 13 ) as well as an indication unit ( 16, 18 ) being provided, the indication unit being connected with the receiver ( 29 ) via a processing unit. |
