Identification system for confirming authorization for access to an object or the use of an object, in particular of a motor vehicle
First Claim
Patent Images
1. An identification system for confirming authorization for access to an object or the use of an object comprising:
- a transceiver unit which is arranged at the object and which generates and emits a trigger signal, wherein a phase-encoded reference signal is generated using the trigger signal and a defined code, a mobile code transmitter which receives the trigger signal and generates a phase-encoded response signal using the received trigger signal and a code which corresponds to the code of the transceiver unit, and transmits the response signal back, and an object-end evaluation unit which has a correlation unit which calculates a correlation value of a correlation function using the received response signal and the reference signal and which generates an enable signal for controlling a security assembly only if the correlation value is greater than a predefined threshold value.
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Abstract
An identification system in which a trigger signal, emitted on an object side and received by a portable code generator, is provided. The trigger signal is used on the object side to phase code a reference signal. The code generator encodes a response signal using the trigger signal in a phase-coded manner and retransmits the response signal. The received response signal is compared with the generated reference signal in an object-side evaluation unit using an autocorrelation function. If the value of the autocorrelation function is larger than a threshold value, an enabling signal is generated.
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Citations
19 Claims
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1. An identification system for confirming authorization for access to an object or the use of an object comprising:
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a transceiver unit which is arranged at the object and which generates and emits a trigger signal, wherein a phase-encoded reference signal is generated using the trigger signal and a defined code, a mobile code transmitter which receives the trigger signal and generates a phase-encoded response signal using the received trigger signal and a code which corresponds to the code of the transceiver unit, and transmits the response signal back, and an object-end evaluation unit which has a correlation unit which calculates a correlation value of a correlation function using the received response signal and the reference signal and which generates an enable signal for controlling a security assembly only if the correlation value is greater than a predefined threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for confirming authorization for access to an object or the use of an object comprising the steps of:
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generating and emitting a trigger signal at the object;
generating a phase-encoded reference signal using the trigger signal and a defined code at the object, receiving the trigger signal at a mobile code transmitter;
generating a phase-encoded response signal using the received trigger signal and a code which corresponds to the code of the transceiver unit;
transmitting the response signal back to the object;
calculating a correlation value of a correlation function using the received response signal and the reference signal; and
generating an enable signal for controlling a security assembly only if the correlation value is greater than a predefined threshold value. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A motor vehicle having an identification system for confirming authorization for access to the motor vehicle comprising:
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a transceiver unit which is arranged at the motor vehicle and which generates and emits a trigger signal, wherein a phase-encoded reference signal is generated using the trigger signal and a defined code, a mobile code transmitter which receives the trigger signal and generates a phase-encoded response signal using the received trigger signal and a code which corresponds to the code of the transceiver unit, and transmits the response signal back, and an evaluation unit arranged in the motor vehicle which has a correlation unit which calculates a correlation value of a correlation function using the received response signal and the reference signal and which generates an enable signal for controlling a security assembly only if the correlation value is greater than a predefined threshold value. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification