Systems and methods for estimating angle of arrival in a wireless device
First Claim
1. A method of a wireless device, the method comprising:
- determining a phase difference between a first offset introduced by a first oscillator of a transceiver of the wireless device and a second offset introduced by a second oscillator of a receiver of the wireless device;
using the transceiver coupled to a first antenna, determining a first attribute value of a first radio frequency (RF) signal received from a source through the first antenna during a first period;
using an attribute estimator of the receiver, determining a second attribute value of the first RF signal received from the source through a second antenna during the first period;
switching the attribute estimator from being coupled to the second antenna to being coupled to a third antenna;
using the transceiver coupled to the first antenna, determining a first attribute of a second RF signal received from the source through the first antenna during a second period;
using the attribute estimator, determining a second attribute of the second RF signal received from the source through the third antenna during the second period; and
compensating for the determined phase difference prior to estimating an angle of arrival associated with the first and second RF signals based on the first and second attributes of the first RF signal and the first and second attributes of the second RF signal.
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Accused Products
Abstract
An example apparatus uses a transceiver to determine a first attribute value of a first RF signal received through a first antenna during a first period. An attribute estimator determines a second attribute value of the first RF signal received through a second antenna during the first period. Responsive to a control signal, the apparatus switches the attribute estimator from being coupled to the second antenna to being coupled to a third antenna. The apparatus then uses the transceiver to determine a first attribute of a second RF signal received through the first antenna during a second period and uses the attribute estimator determine a second attribute of the second RF signal received through the third antenna during the second period. The apparatus then can estimate an angle of arrival associated with the first and second RF signals based on the first and second attributes of the first RF signal and the first and second attributes of the second RF signal.
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Citations
18 Claims
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1. A method of a wireless device, the method comprising:
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determining a phase difference between a first offset introduced by a first oscillator of a transceiver of the wireless device and a second offset introduced by a second oscillator of a receiver of the wireless device; using the transceiver coupled to a first antenna, determining a first attribute value of a first radio frequency (RF) signal received from a source through the first antenna during a first period; using an attribute estimator of the receiver, determining a second attribute value of the first RF signal received from the source through a second antenna during the first period; switching the attribute estimator from being coupled to the second antenna to being coupled to a third antenna; using the transceiver coupled to the first antenna, determining a first attribute of a second RF signal received from the source through the first antenna during a second period; using the attribute estimator, determining a second attribute of the second RF signal received from the source through the third antenna during the second period; and compensating for the determined phase difference prior to estimating an angle of arrival associated with the first and second RF signals based on the first and second attributes of the first RF signal and the first and second attributes of the second RF signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a transceiver configured to couple to a first antenna, the transceiver to provide a first phase value of a first radio frequency (RF) signal received from a source through a first antenna during a first period and provide a first phase value of a second RF signal received from the source through the first antenna during a second period; a switching circuit configured to switch between being coupled to each of a plurality of antennas including a second antenna and a third antenna; a partial receiver coupled to the switching circuit, the partial receiver configured to provide a second phase value of the first RF signal received from the source through the second antenna during the first period and provide a second phase value of the second RF signal received from the source through the third antenna during a second period; a direction estimator coupled to the transceiver and the partial receiver, the direction estimator configured to estimate an angle of arrival associated with the first and second RF signals based on the first and second phase values of the first RF signal and the first and second phase values of the second RF signal; and a regulator coupled to the transceiver, the partial receiver, and the direction estimator, the regulator to determine a phase difference between a first phase offset introduced by a first oscillator of the transceiver and a second phase offset introduced by a second oscillator of the of the partial receiver, wherein the direction estimator is configured to compensate for the determined phase difference to estimate the angle of arrival. - View Dependent Claims (11, 12, 13, 14)
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15. A wireless device comprising:
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an antenna array including a first antenna, a second antenna, and a third antenna; a first receive path coupled to a first oscillator and to the first antenna, the first receive path including a demodulator to demodulate radio frequency (RF) signals received through the first antenna from a source; a coupling circuity configured to couple the first antenna to the first receive path and to alternately couple to the second antenna and the third antenna; a second receive path coupled to a second oscillator and to the coupling circuit, the second receive path including a phase estimator to provide phase estimations associated with RF signals received through the second antenna and the third antenna from the source; a regulator coupled to the first oscillator and the second oscillator and configured to concurrently couple the first antenna to the first receive path and to the second receive path to synchronize a first phase offset introduced by the first oscillator with a second phase offset introduced by the second oscillator; and processing circuitry configured to cause the coupling circuit to couple to the second antenna during a first period and to couple to the third antenna during a second period, the processing circuitry to estimate a direction of a source of first and second RF signals relative to the antenna array, based on a first phase difference of the first RF signal between the first antenna and the second antenna and a second phase difference of the second RF signal between the first antenna and the third antenna. - View Dependent Claims (16, 17, 18)
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Specification