Method and a device for identifying the position of a transponder
First Claim
Patent Images
1. A method comprising:
- identifying a position of a terminal relative to a transponder fitted with a circuit presenting a load impedance, said terminal receiving signals from the transponder through a single antenna and circuit, wherein identifying comprises;
a step of the terminal receiving through the single antenna and circuit a first signal relating to the load impedance of the transponder;
a step of obtaining a second signal from the first signal;
a step of determining a position indication about the position of the single antenna and circuit of the terminal relative to the transponder and based on calculating a distance variation from the second signal, including;
measuring a position indication of the terminal at a first instant;
measuring a position indication of the terminal at a second instant; and
evaluating a distance variation from the first measurement and the second measurement; and
a step of delivering a third signal as a function of the distance variation as determined, suitable for informing a user of the terminal about a variation of said position indication relative to an earlier position indication.
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Accused Products
Abstract
A terminal is provided, which has a near-field communication module suitable for receiving signals from a transponder fitted with a circuit presenting a load impedance. The terminal includes a receiver suitable for receiving a first signal relating to the load impedance of the transponder (T3). The terminal obtains a second signal from the first signal and determines a position indication of the terminal relative to the transponder and based on analysis of the second signal. The terminal delivers a third signal that is a function of the determined position indication.
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Citations
5 Claims
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1. A method comprising:
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identifying a position of a terminal relative to a transponder fitted with a circuit presenting a load impedance, said terminal receiving signals from the transponder through a single antenna and circuit, wherein identifying comprises; a step of the terminal receiving through the single antenna and circuit a first signal relating to the load impedance of the transponder; a step of obtaining a second signal from the first signal; a step of determining a position indication about the position of the single antenna and circuit of the terminal relative to the transponder and based on calculating a distance variation from the second signal, including; measuring a position indication of the terminal at a first instant; measuring a position indication of the terminal at a second instant; and evaluating a distance variation from the first measurement and the second measurement; and a step of delivering a third signal as a function of the distance variation as determined, suitable for informing a user of the terminal about a variation of said position indication relative to an earlier position indication. - View Dependent Claims (2)
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3. A terminal comprising:
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a near-field communication device configured for receiving signals from a transponder fitted with a circuit presenting load impedance; a receiver configured to enable the terminal to receive a first signal relating to the load impedance of the transponder through a single antenna and circuit; obtaining means for obtaining a second signal from the first signal; determination means for determining a position indication of the single antenna and circuit of the terminal relative to the transponder, based on calculating a distance variation from the second signal, including; measuring a position indication of the terminal at a first instant; measuring a position indication of the terminal at a second instant; and evaluating a distance variation from the first measurement and the second measurement; and delivery means for delivering a third signal that is a function of the determined distance variation, suitable for informing a user of the terminal about a variation of said position indication relative to an earlier position indication. - View Dependent Claims (4)
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5. A non-transitory computer-readable medium comprising a computer program stored thereon and suitable for being implemented on a terminal, the program comprising code instructions that, when the program is executed by a processor, performs steps of a method of identifying a position of the terminal relative to a transponder fitted with a circuit presenting a load impedance, said terminal being receiving signals from the transponder through a single antenna and circuit, the method comprising:
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a step of the terminal receiving through the single antenna and circuit a first signal relating to the load impedance of the transponder; a step of obtaining a second signal from the first signal; a step of determining a position indication about the position of the single antenna and circuit of the terminal relative to the transponder and based on calculating a distance variation from the second signal, including; measuring a position indication of the terminal at a first instant; measuring a position indication of the terminal at a second instant; and evaluating a distance variation from the first measurement and the second measurement; and a step of delivering a third signal as a function of the distance variation as determined, suitable for informing a user of the terminal about a variation of said position indication relative to an earlier position indication.
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Specification