IC card, IC card processor and IC card system to improve data transmission speed
First Claim
Patent Images
1. An IC card comprising:
- a signal processing circuit;
a modulator for performing Quadrature Amplitude Modulation (QAM) on a data signal received from the signal processing circuit and generating a transmission signal; and
an antenna for transmitting the transmission signal modulated by the modulator.
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Abstract
An IC card system for transceiving data signal between an IC card processor and an IC card in the manner of non-contact are provided. The IC card modulates the signal to be transmitted to the processor in the manner of Quadrature Amplitude Modulation and generates the modulated signal. A card reader demodulates the signal received from the IC card in the manner of QAM. The rate of the data signal transmitted from the IC card to the card reader is improved.
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Citations
16 Claims
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1. An IC card comprising:
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a signal processing circuit;
a modulator for performing Quadrature Amplitude Modulation (QAM) on a data signal received from the signal processing circuit and generating a transmission signal; and
an antenna for transmitting the transmission signal modulated by the modulator. - View Dependent Claims (2, 3, 4, 5)
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6. An IC card processor, comprising:
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a signal processing circuit;
an antenna; and
a demodulator for demodulating a reception signal received by the antenna in the manner of Quadrature Amplitude Modulation (QAM) and providing the demodulated data signal to the signal processing circuit. - View Dependent Claims (7, 8, 9, 10)
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11. An IC card system for transceiving a data signal in the manner of non-contact between an IC card processor and an IC card, wherein the IC card comprises:
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a first antenna for receiving a transmission signal from the IC card processor; and
a first modulator for modulating a signal to transmit to the processor in the manner of Quadrature Amplitude Modulation (QAM), wherein the transmission signal modulated by the first modulator is transmitted through the first antenna, and wherein the IC card processor comprises;
a second antenna for receiving a transmission signal from the IC card, and a second demodulator for restoring the transmission signal from the IC card by demodulating the transmission signal received by the second antenna in the manner of QAM, wherein the transmission signal modulated by the modulator is transmitted through the antenna. - View Dependent Claims (12, 13)
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14. An IC card system for transceiving a data signal in the manner of non-contact between the IC card processor and the IC card, wherein the IC card comprises:
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a first antenna for receiving a transmission signal from the IC card processor;
a first modulator for performing Quadrature Amplitude Modulation (QAM) a signal to transmit to the processor; and
a first demodulator for demodulating a reception signal received by the first antenna so that the reception signal are restored, wherein the transmission signal modulated by the first modulator is transmitted through the first antenna, wherein the IC card processor comprises;
a second antenna for receiving a reception signal from the IC card;
a second demodulator for performing Quadrature Amplitude Modulation (QAM) on the reception signal received from the second antenna so that the reception signals are restored; and
a second modulator for modulating a signal to transmit to the IC card, wherein the transmission signal modulated by the modulator is transmitted through the second antenna. - View Dependent Claims (15, 16)
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Specification