Anti-theft protection system for a motor vehicle, and a method for operating an anti-theft protection system
First Claim
1. An anti-theft protection system for a motor vehicle, the anti-theft protection system comprising:
- a transmitting and receiving unit adapted to be arranged on the motor vehicle, the transmitting and receiving unit transmitting a transmitted signal;
a code transmitter adapted to be portable with respect to the motor vehicle, the code transmitter transmitting an echo signal at least in response to receiving the transmitted signal; and
an evaluation unit evaluating the echo signal to determine a position of the code transmitter from an echo profile of the echo signal.
1 Assignment
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Accused Products
Abstract
Anti-theft protection system for a motor vehicle, and a method for operating an anti-theft protection system. The anti-theft protection system has a transmitting and receiving unit in the motor vehicle, which transmits radar signals and then waits for echo signals. A code transmitter, which receives a radar signal, modulates this signal and sends it back. An evaluation unit analyses all the received echo signals firstly for authorization of the code transmitter and secondly in order to determine the relative interior/exterior position of the code transmitter with respect to the motor vehicle.
20 Citations
11 Claims
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1. An anti-theft protection system for a motor vehicle, the anti-theft protection system comprising:
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a transmitting and receiving unit adapted to be arranged on the motor vehicle, the transmitting and receiving unit transmitting a transmitted signal;
a code transmitter adapted to be portable with respect to the motor vehicle, the code transmitter transmitting an echo signal at least in response to receiving the transmitted signal; and
an evaluation unit evaluating the echo signal to determine a position of the code transmitter from an echo profile of the echo signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for operating an anti-theft protection system for a motor vehicle, the method comprising:
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transmitting a transmitted signal from a transmitting and receiving unit adapted to be arranged on the motor vehicle;
receiving an echo signal transmitted from a code transmitter adapted to be portable with respect to the motor vehicle; and
evaluating the echo signals in an evaluation unit adapted to be arranged on the motor vehicle, the evaluating including determining a position of the code transmitter based on an echo profile of the echo signal. - View Dependent Claims (8, 9, 10, 11)
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Specification