Passive RFID Transponder and RFID Reader
First Claim
Patent Images
1. 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.
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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.
21 Citations
20 Claims
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1. A passive RFID transponder comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A passive RFID transponder comprising:
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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. - View Dependent Claims (9)
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10. A passive RFID transponder comprising:
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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.
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11. An RFID reader comprising:
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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. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of providing an amplitude-modulated coded signal, comprising:
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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.
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18. A method of providing an amplitude-modulated coded signal, comprising:
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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.
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19. A method of providing an amplitude-modulated coded signal, comprising:
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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.
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20. A method of providing a decoded digital data stream, comprising:
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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.
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Specification