| 摘要 |
<p>The present invention provides a method for validating positional data in vehicle surveillance applications wherein vehicles transmit positional data indicating their own position to surrounding vehicles using a data link over which a transmission is initiated at a given transmission point in time that is known by all users of said data link. The method comprises the steps of:
receiving, at a receiving unit, a signal carrying positional data indicating an alleged position of a vehicle, transmitted from a radio source over said data link;
estimating the distance between the receiving unit and the radio source based on the time of flight, TOF, and the propagation velocity of the received signal, said TOF being determined based on the time elapsed from the transmission point in time of said signal to the time of reception of at least a first part of the signal; and,
determining a deviation value indicating the difference between the distance to the position of a vehicle according to the received positional data and the estimated distance to the radio source.</p> |
