VEHICLE ELECTRONIC KEY SYSTEM
VEHICLE ELECTRONIC KEY SYSTEM
- Neue Suche nach: KONNO TAKESHI
- Neue Suche nach: KONNO TAKESHI
To surely perform authentication based on a request signal Sr which is the authorized radio signal even under bad radio environment in which radio noise comes continuously. A portable device which receives a request signal Sr transmitted from a vehicle-mounted device and transmits an answer signal comprises a receiving-sensitivity changing switch which changes receiving sensitivity of a receiving circuit which receives the request signal Sr. As a result, even if the authentication cannot be carried out with normal receiving sensitivity due to the influence of the continuous radio noise, by changing the receiving sensitivity to low sensitivity, and by bringing the portable device physically close to a transmission source of the request signal which is the authorized radio signal, it is made possible to dramatically increase the probability that the authentication based on the authorized radio signal can be carried out.
Dokumentinformationen
VEHICLE ELECTRONIC KEY SYSTEM
SYSTEME DE CLE ELECTRONIQUE DE VEHICULE
2015-10-06
Patent
Elektronische Ressource
Englisch