Method and system to measure the phase offset based on the frequency response in a NFC system
First Claim
1. A method for compensating phase offset caused by a matching network and antenna of a communications device, the method comprising:
- generating a mapping that correlates phase offset with a characteristic parameter, wherein the characteristic parameter is associated with a signal that is either received or transmitted by the communications device, and wherein the characteristic parameter is comprising of one or more combination of the following features;
a resonance peak frequency for the signal, an amplitude peak of a frequency response for the signal, an amplitude or a combination of amplitudes at specific frequencies for the signal, a notch of a frequency response for the signal, a bandwidth of the matching network and antenna, a specific shape of a frequency response for the signal;
measuring the characteristic parameter for the communications device;
using the measured characteristic parameter and the mapping to determine a phase offset for the communications device; and
using the determined phase offset to compensate for the phase offset caused by the matching network and antenna of the communications device.
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Abstract
The present invention provides for a method and system for compensating phase offset caused by a matching network and antenna of a communications device. The method comprises: generating a mapping that correlates phase offset with a characteristic parameter; measuring the characteristic parameter for the communications device; using the measured characteristic parameter and the mapping to determine a phase offset for the communications device; and using the determined phase offset to compensate for the phase offset caused by the matching network and antenna of the communications device. The present invention also provides for a method and system for measuring a phase offset caused by a matching network and antenna of a communications device.
35 Citations
17 Claims
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1. A method for compensating phase offset caused by a matching network and antenna of a communications device, the method comprising:
- generating a mapping that correlates phase offset with a characteristic parameter, wherein the characteristic parameter is associated with a signal that is either received or transmitted by the communications device, and wherein the characteristic parameter is comprising of one or more combination of the following features;
a resonance peak frequency for the signal, an amplitude peak of a frequency response for the signal, an amplitude or a combination of amplitudes at specific frequencies for the signal, a notch of a frequency response for the signal, a bandwidth of the matching network and antenna, a specific shape of a frequency response for the signal;
measuring the characteristic parameter for the communications device;
using the measured characteristic parameter and the mapping to determine a phase offset for the communications device; and
using the determined phase offset to compensate for the phase offset caused by the matching network and antenna of the communications device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- generating a mapping that correlates phase offset with a characteristic parameter, wherein the characteristic parameter is associated with a signal that is either received or transmitted by the communications device, and wherein the characteristic parameter is comprising of one or more combination of the following features;
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11. A method for measuring a phase offset caused by a matching network and antenna of a communications device, the method comprising:
- transmitting a signal from the communications device to a reader device or a counterpart communications device;
determining a measured characteristic parameter for the signal, wherein the measured characteristic parameter is comprising of one or more combination of the following features;
a resonance peak frequency for the signal, an amplitude peak of a frequency response for the signal, an amplitude or a combination of amplitudes at specific frequencies for the signal, a notch of a frequency response for the signal, a bandwidth of the matching network and antenna, a specific shape of a frequency response for the signal;
using the measured characteristic parameter to determine the phase offset caused by the matching network and antenna. - View Dependent Claims (12, 13, 14)
- transmitting a signal from the communications device to a reader device or a counterpart communications device;
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15. A method for measuring a phase offset caused by a matching network and antenna of a communications device, the method comprising:
- receiving, by the communications device, a signal from a reader device;
determining a measured characteristic parameter for the signal, wherein the measured characteristic parameter is comprising of one or more combination of the following features;
a resonance peak frequency for the signal, an amplitude peak of a frequency response for the signal, an amplitude or a combination of amplitudes at specific frequencies for the signal, a notch of a frequency response for the signal, a bandwidth of the matching network and antenna, a specific shape of a frequency response for the signal;
using the measured characteristic parameter to determine the phase offset caused by the matching network and antenna. - View Dependent Claims (16, 17)
- receiving, by the communications device, a signal from a reader device;
Specification