METHOD AND SOLUTION OF DATA TRANSMISSION FROM THE TRANSPONDER TO THE READER, ESPECIALLY IN PAYMENT SOLUTIONS WITH A MOBILE COMMUNICATION DEVICE
3 Assignments
0 Petitions
Accused Products
Abstract
The method and solution can be mainly used for data transmission in cashless payment applications, especially those realized from the mobile phone while using RFID and/or NFC platform. The signals with different frequency are combined in antenna system (M) of the receiver (1) and transmitter (2) and then the carrier signal is separated from the result of the combined signals and the transmitted data are demodulated. The difference between the frequencies has a value, that corresponds to the size of the subcarrier frequency to which the receiver (1) is preset.
During transmission the transformer connection coefficient can have the value k=0.2−0.001, while the antenna (3) of the receiver (2) is tuned narrowly to the transmitter'"'"'s (2) frequency without considering the subcarrier frequency. The transmitter is preferably located on a memory card or on a card with a format and interface of a memory card, e.g. micro SD.
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Citations
35 Claims
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1-15. -15. (canceled)
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16. A method for transmitting data from a transmitter to a receiver, the transmitter having a transmitter antenna and the receiver having a receiver antenna, the method comprising:
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the receiver transmitting a carrier signal at a carrier frequency; the transmitter transmitting a transmitter signal at a transmitter transmission frequency, wherein the transmitter transmission frequency is different from the carrier frequency, and the difference between the transmitter transmission frequency and the carrier frequency defines a subcarrier frequency; the transmitter modulating the data on the transmitter signal; and the receiver receiving a received signal that is created by combining the carrier signal with the modulated transmitter signal, and demodulating the received signal as a combined signal having the carrier frequency and a modulated subcarrier frequency that is modulated with received data, wherein the received signal is created only via mutual antenna induction and without the transmitter transmitting a signal at the subcarrier frequency. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method for transmitting data from a transmitter to a receiver, the transmitter having a transmitter antenna and the receiver having a receiver antenna, the method comprising:
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the receiver transmitting a carrier signal at a carrier frequency; the transmitter transmitting a transmitter signal at a transmitter transmission frequency, wherein the transmitter transmission frequency is different from the carrier frequency, and the difference between the transmitter transmission frequency and the carrier frequency defines a subcarrier frequency; the transmitter modulating the data on the transmitter signal; and combining the carrier signal and the modulated transmitter signal in an antenna system of the receiver and the transmitter to form a combined signal; the receiver receiving the combined signal, and demodulating the received combined signal by separating the carrier signal from the combined signal to form a modulated subcarrier signal, and demodulating the transmitted data from the modulated subcarrier signal. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. A transmitter for transmitting data to a receiver, the receiver having a receiver antenna and transmitting at a carrier frequency, the transmitter comprising:
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a transmitter antenna; and a modulation element comprising an electromagnetic wave generator operating at a frequency that is different from the carrier frequency, wherein the electromagnetic wave generator is connected to energize the transmitter antenna when transmitting data over a transformer connection of mutual induction between the transmitter antenna and the receiver antenna. - View Dependent Claims (33, 34)
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35. A receiver for receiving data transmitted from a transmitter, the transmitter having a transmitter antenna and transmitting a modulated transmitter signal at a transmitter transmission frequency, the receiver comprising:
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a receiver antenna; and a demodulation element that is connected to a turning of an induction of the transmitter antenna toward a sensor resistor via an inductor, wherein the receiver transmits a carrier signal at a carrier frequency, receives a received signal that is created by combining the carrier signal with the modulated transmitter signal, and demodulates the received signal as a combined signal having the carrier frequency and a modulated subcarrier frequency that is modulated with received data, wherein the received signal is created only via mutual antenna induction and without the transmitter transmitting a signal at the subcarrier frequency.
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Specification