| 摘要 |
<p>A position detection system for detecting a relay attack on a passive keyless entry system comprises a plurality of first communication devices, each comprising a transmitter for transmitting a signal to a second communication device and a detector for detecting, by receiving from the second communication device, a signal corresponding to a distance between the first and the second communication device. The second communication device comprises a transmitter for transmitting a reply signal to the plurality of first communication devices. The position detection system comprises a determining unit for determining whether the multiple distances are below a predetermined distance and a position detector for detecting the position of a relay device.</p> |
