Continental Automotive Gmbh

Continental Automotive France

Dawid Durka

Sylvain Godet

Rachid Benbouhout

Jean-Christophe Bouthinon

Frédéric Lathiere

A method for estimating the distance between a vehicle and an authentication device, the vehicle including a computer and a plurality of communication modules capable of communicating with the device over a wireless communication link, each communication module including an electronic clock that defines the sampling frequency of the signals received from the device. The method includes in particular the steps of addition of noise to a response signal received from the device, of sampling of the noisy response signal, of detection, at a second instant, of the noisy response signal when the amplitude of the noisy response signal exceeds a predetermined detection threshold, of calculation of the time that has elapsed between a first instant and the second instant, and of estimation of the distance between the vehicle and the device based on the calculated time.

Method for estimating the distance separating a vehicle and an authentication device

A system of at least two units that transmit and/or receive a signal at a first or a second frequency, respectively, each of the units being individually connected to the antenna, which is common to a first branch and to a second branch, respectively. The first branch or the antenna includes first passive electronics preventing passage of the signal at the second frequency to the first unit and allowing passage of the signal at the first frequency to the antenna. The second branch or the antenna includes second passive electronics preventing passage of the signal at the first frequency to the second unit and allowing passage of the signal at the second frequency to the antenna.

System of at least two transmitting and/or receiving units connected to a common antenna

A method for estimating the distance between an authentication device and a vehicle, in particular a motor vehicle, the vehicle including a computer and a plurality of communication modules capable of communicating with the device by exchanging signals over a wireless communication link, each communication module including an electronic clock that defines the sampling frequency of the signals received from the device. The method includes a plurality of measurement phases each comprising determination, by the computer, of the distance between the vehicle and the device and stopping and restarting of the electronic clock, and estimation of the actual distance between the vehicle and the device based on the plurality of distances determined during the measurement phases.

Method for estimating the distance separating an authentication device and a motor vehicle

A radiofrequency transmission device (D') includes: a transmission unit () for transmitting a voltage signal (S) in pulsed form; a radiofrequency antenna (A); filtering elements (); and a voltage source (Vcc), wherein the filtering elements (&#x2032;) include: andL=Zwhere

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Toulouse, France

Dawid Durka