Continental Automotive Gmbh

Bayerische Motoren Werke Aktiengesellschaft

Continental Automotive Technologies Gmbh

Thomas Reisinger

Markus Aunkofer

Martin Opitz

Ulrich Emmerling

Christian Kursawe

Stefan Haller

Frank Leong

Daniel Knobloch

Franz Plattner

Thomas Georgi

Wolfgang Kuechler

Maximilian Treindl

Herbert Froitzheim

Alexander Krebs

Roland Wagner

Stefan Hammes

Ingo Tschauschner

Ewald Altmann

Jürgen Schmid

Franz Stolz

Markus Doering

Stefan Meckl

Lutz Braungardt

Disclosed are a control device for a motor vehicle access or locating system and a method for operating a motor vehicle access or locating system, having the steps of: identifying a received signal that has travelled from a transmitter to a receiver of a control device along the strongest signal path, the peak path, as the peak path signal; determining the time of flight, ToF, of the peak path signal; determining a time interval, δ, of the time of flight of the peak path signal; determining a threshold value, T, for the reliability of a first path search depending on δ; carrying out the first path search at δ taking the threshold value into consideration.

Control device for a motor vehicle access or locating system and method

Disclosed is a distance measuring system for measuring distance of a first transceiver from second transceivers, comprising the first transceiver having a first time zone, a second transceiver having a second time zone, and a control unit having a control-unit time zone. The second transceiver ascertains a time-zone relationship between the second transceiver and the first transceiver, and transmits the time-zone relationship to the control unit. The control unit receives the time-zone relationship, and ascertains, using the received time-zone relationship, a time-zone relationship between the control-unit time zone and the first transceiver. The first transceiver transmits at a defined instant in time or for a defined time period of the first time zone a distance measurement command to the second transceiver. The first transceiver transmits a measurement signal at a further defined instant in time, and the second transceiver switches from an inactive into an active receiving or measuring state.

Distance measuring system

A method for operating a transmitter unit of a radio key system of a motor vehicle, wherein a control device of the transmitter unit provides that, for a respective closing operation in at least one measurement cycle, in each case in response to a polling message, in a plurality of successive time slots, in each case one of a plurality of anchor transmitters of the transmitter unit transmits an anchor message, and the measurement cycle is ended by reception of a final message, which signals reception times of the anchor messages measured by a radio key system. A transmission sequence of the anchor transmitters may be determined by means of an assignment rule in which an assignment of the anchor transmitters to the time slots is carried out, wherein the assignment rule provides that the assignment takes place variably over time.

Method and control device for operating a transmitter of a radio key system of a motor vehicle and motor vehicle with such a transmitter

The present disclosure relates to transmitter and/or receiver units (transceivers), such as in particular motor vehicle transceivers. The teachings thereof may be embodied in methods and devices for detecting changes in the positions of transceivers relative to each other. For example, a system may include: a distance determining device to measure a current distance value corresponding to a respective distance of two of the transceivers relative to each other; and a comparator to compare the at least one current distance value and with a stored reference distance value.

Transceiver distance measuring systems

A method and apparatus for determining a propagation delay and/or a distance between a plurality of transceivers, in particular between transceivers outside and/or as part of a motor vehicle, wherein the transceivers are each designed: to generate identical codes in a plurality of these transceivers, using a calculation method known to them, from at least one starting value transmitted, in particular, from one of the transceivers to the further transceivers, to transmit one or more messages from at least one of the transceivers to one or more further ones of the transceivers, which messages each contain at least one of the codes, to determine at least one propagation delay and/or at least one distance between at least two of the transceivers, in particular from the propagation delay and/or transmission times of the one or more messages.

Method and apparatus for determining a propagation delay and/or a distance between multiple transceivers, particularly for a vehicle-entry and/or starting system

The disclosure relates to distance determining apparatus for determining a distance between an anchor and a tag. The apparatus is configured to select a first frame type or a second frame type for a message that is to be transmitted, to optimize an energy of the first frame type for a secure preamble detection, and to optimize an energy of the second frame type for a data transmission.

Apparatus for determining a distance between an anchor and a tag

The disclosure relates to an approximate determination of a distance between a wireless key which is assigned to a motor vehicle and a transceiver arrangement which is disposed in or on the motor vehicle. In the course of a ranging cycle, a first first path relating to a first threshold value and a second first path relating to a higher, second threshold value are calculated. Two distances are estimated on the basis of this dual first path calculation.

Device and method for determining a distance

The present disclosure relates to a method and devices for transit-time-based distance measurement and the teachings may be applied to locating keys for a motor vehicle. In one embodiment, a system for detecting the distance between a vehicle and an associated key may include: a transceiver associated with a vehicle; a key for the motor vehicle; and a processor configured to determine an estimated signal transit time between the transceiver and the key based at least in part on a ratio of a length of two time intervals between the transmission or reception of a message between the transceiver and the key.

Key location system

A system providing a spread spectrum and a narrowband data transmission may comprise a DSSS transmitter and a DSSS receiver. The DSSS transmitter may convert a bit succession (d) into a chip succession (s) using a chip sequence (c, c') and send a succession of impulses (s(t)) corresponding to the chip succession (s). The DSSS receiver may receive impulses (s(t)) sent by the transmitter and filter the received impulses (r(t)) using a filter having an impulse response (x(t)) dependent on the chip sequence (c, c&#x2032;). The chip sequence (c) may be a spread sequence. The narrowband data transmission may use chip sequence (c&#x2032;) and a corresponding impulse response (x(t)) of the filter. The chip sequence (c&#x2032;) does not comprise a succession having two directly successive arithmetic sign changes and an arithmetic sign change does not occur after the first and before the last chip in the chip sequence (c&#x2032;).

Apparatus and method for narrowband data transmission by means of a DSSS transmission system

A circuit arrangement for adaptively suppressing interference signals includes a first local oscillator for generating a first local oscillator signal and a second local oscillator for generating a second local oscillator signal, each signal having an adjustable frequency. The circuit arrangement also includes a first mixer for converting a high-frequency signal into a corresponding intermediate frequency signal using the first local oscillator signal and a second mixer for converting the intermediate frequency signal into a corresponding baseband signal using the second local oscillator signal. The circuit arrangement also includes a notch filter with a rigidly defined blocking range. A control unit estimates the frequency of an interference signal contained in the intermediate frequency signal and to adjust the frequency of the local oscillator signals to the estimated frequency of the interference signal such that the frequency of the interference signal is converted into the blocking range of the notch filter.

Device and method for adaptively suppressing in-band interference signals in radio receivers

A method for allocating a transmission signal to a transmission channel which has a transmission bandwidth and a rated center frequency and which is established between a radio transmitter and a radio receiver has the steps: emitting the transmission signal on the radio transmitter end with an actual transmitter frequency; receiving the transmission signal in the radio receiver; determining the frequency of the transmission signal in the radio receiver; and deciding on the allocation of the transmission signal to a transmission channel if the frequency determined by the radio receiver lies in a predetermined frequency range.

Method for allocating transmission signals to transmission channels

Controller for a motor vehicle for wireless communication with a least one peripheral unit with a least one receiver unit () for receiving radio signals for standard applications and at least one receiver unit () for receiving radio signals for long-range applications which are emitted by the peripheral unit at different frequencies for the standard applications and the long-range applications. With a least one antenna (ANT) for one of the two receiver units () respectively and with a control unit () for controlling the two receiver units () as well as for evaluating signals from the two receiver units ().

Controller for wireless communication with a peripheral unit

A signal processing arrangement is designed to process a digitalized phase-modulated and/or digitalized spreaded input signal () and has a complex channelizer () which despreads and/or demodulates the input signal () in the time range on the basis of a folding operation.

Signal processing arrangement and signal processing method

A method for exchanging information between a vehicle () and a mobile ID provider () has the following process steps: transmitting status request signals of the ID provider () to a communications device () in the vehicle having a prescribed period, wherein the periodically occurring action has the status request signal and a predefined pause, &#x2014;activating the communications device () in the vehicle in case of alarm in a receiving mode, receiving the status request signal of the ID provider () by the activated communications device () in the vehicle, &#x2014;transmitting an alarm message by the communications device () in the vehicle to the mobile ID provider (); and display of the alarm signal on the ID provider (). The method is particularly suited for the display of alarm messages of a vehicle on a mobile ID provider.

Method, device and system for exchanging information between a vehicle and a mobile ID provider

In a method for searching for signals among interference signals in a multi-channel radio receiver, at least two different data signals are transmitted on at least one physical channel of a radio system to a common receiver. The search for a signal is initiated on any channel, starting with a sequential search of a useful signal by measuring the current signal strength in the form of the RSSI value; a search is made for a signal criterion of the signal and when said criterion has been identified, the measured RSSI value is compared with a predefined RSSI threshold value; if the RSSI threshold value is exceeded, the search for a signal is switched to a search for a data frame and if a data frame is found, the useful data is read; if no signal criterion is identified, if the RSSI threshold value is not exceeded and if no data frame is found, the procedure is interrupted and a new search operation is initiated once a new RSSI threshold value has been defined. The invention is particularly suitable for radio transmission systems in motor vehicles to implement RKE and TPMS functions and for multi-channel transmissions, used for example in remote metering and remote control systems.

Growing community of inventors

Regenstauf, Germany

Thomas Reisinger