Passive RFID Transponder and RFID Reader
AssigneeInfineon Technologies AG
InventorsWalter Kargl, Edmund Ehrlich
Life of this patent
Estimating the term…
Abstract
A passive RFID transponder includes a coder and a modulator. The coder generates a digital coded data stream based on a digital data stream to be transmitted. The digital coded data stream includes an initialization bit sequence having a maximum data frequency of the digital coded data stream. Furthermore, the digital coded data stream changes its value at the latest after a predefined number of bits. The modulator modulates an amplitude of a carrier signal with the digital coded data stream to provide an amplitude-modulated coded signal.
Claims20
A passive RFID transponder comprising:
- a coder configured to generate a digital coded data stream based on a digital data stream to be transmitted, the digital coded data stream including an initialization bit sequence having a maximum data frequency of the digital coded data stream, the digital coded data stream changing its value at the latest after a predefined number of bits;
- and
- a modulator configured to modulate an amplitude of a carrier signal with the digital coded data stream to provide an amplitude-modulated coded signal.
A passive RFID transponder comprising:
- a coder configured to generate a digital coded data stream based on a digital data stream to be transmitted, the digital coded data stream including an initialization bit sequence having a maximum data frequency of the digital coded data stream, the maximum data frequency being independent of a subcarrier signal;
- and
- a modulator configured to modulate an amplitude of a carrier signal with the digital coded data stream to provide an amplitude-modulated coded signal.
A passive RFID transponder comprising:
- a coder configured to generate a digital coded data stream based on a digital data stream to be transmitted, the digital coded data stream changing its value at the latest after a predefined number of bits, a maximum data frequency of the digital coded data stream being independent of a subcarrier signal;
- and
- a modulator configured to modulate an amplitude of a carrier signal with the digital coded data stream to provide an amplitude-modulated coded signal.
An RFID reader comprising:
- a receiver configured to receive an amplitude-modulated coded reception signal;
- a demodulator configured to demodulate the amplitude-modulated coded reception signal based on a carrier signal generated by the RFID reader to obtain a digital coded data stream;
- and
- a decoder configured to determine a maximum data frequency of the digital coded data stream and provide a decoded digital data stream based on the maximum data frequency.
A method of providing an amplitude-modulated coded signal, comprising:
- generating a digital coded data stream based on a digital data stream to be transmitted, the digital coded data stream including an initialization bit sequence having a maximum data frequency of the digital coded data stream, the digital coded data stream changing its value at the latest after a predefined number of bits;
- and
- modulating an amplitude of a carrier signal with the digital coded data stream to provide the amplitude-modulated coded signal.
A method of providing an amplitude-modulated coded signal, comprising:
- generating a digital coded data stream based on a digital data stream to be transmitted, the digital coded data stream including an initialization bit sequence having a maximum data frequency of the digital coded data stream, the maximum data frequency being independent of a subcarrier signal;
- and
- modulating an amplitude of a carrier signal with the digital coded data stream to provide the amplitude-modulated coded signal.
A method of providing an amplitude-modulated coded signal, comprising:
- generating a digital coded data stream based on a digital data stream to be transmitted, the digital coded data stream changing its value at the latest after a predefined number of bits, a maximum data frequency of the digital coded data stream being independent of a subcarrier signal;
- and
- modulating an amplitude of a carrier signal with the digital coded data stream to provide the amplitude-modulated coded signal.
A method of providing a decoded digital data stream, comprising:
- receiving an amplitude-modulated coded reception signal;
- demodulating the amplitude-modulated coded reception signal based on a carrier signal generated by an RFID reader in order to obtain a digital coded data stream;
- determining a maximum data frequency of the digital coded data stream;
- and
- providing the decoded digital data stream based on the maximum data frequency.
Dependencies are inferred from the claim text.