Near field communications transmitter
First Claim
1. A transmitter comprising:
- a signal generator for generating a carrier signal;
means for generating a data signal;
means for delaying the data signal; and
a modulator for modulating the carrier signal with the original data signal and the delayed version of the data signal, wherein the transmitter is a near field communication (NFC) transmitter.
2 Assignments
0 Petitions
Accused Products
Abstract
The present application relates to a near field communications (NFC) transmitter (10) that is configured to modulate a carrier signal with a data signal using a quadrature modulator (12). A delay is introduced into the data signal, and this delayed version of the data signal is input to the input ports of the quadrature modulator (12). The resulting I and Q signals are combined to generate an output signal that is modulated in both amplitude and phase. An NFC receiver receiving the signal transmitted by the transmitter (10) is able to recover the data signal even when the amplitude of the received signal is greatly compressed, as the phase modulation of the transmitted signal is unaffected by the compression associated with power harvesting.
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Citations
12 Claims
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1. A transmitter comprising:
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a signal generator for generating a carrier signal; means for generating a data signal; means for delaying the data signal; and a modulator for modulating the carrier signal with the original data signal and the delayed version of the data signal, wherein the transmitter is a near field communication (NFC) transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of generating a signal in a transmitter apparatus, the method comprising:
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generating a carrier signal; generating a data signal representing data to be modulated onto the carrier signal; delaying the data signal; and modulating the carrier signal with the original data signal and the delayed data signal, wherein the transmitter is a near field communication transmitter and is configured to generate a near field communications signal. - View Dependent Claims (9, 10, 11, 12)
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Specification