US 2026/0298992 A1Published application

Power variability compensation method in gesture detection schemes

AssigneeAmazon Technologies, Inc.

InventorsNicholas Evangelos Buris, Jason Wang

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Abstract

Technologies directed to an energy efficient technique for Antennas as Sensors (A2S) systems used for detecting user input events are described. One electronic device includes a wireless communication component coupled to an antenna via a radio frequency (RF) path and an A2S system. The electronic device sends RF signals to the antenna via the RF path in a first time window, and receives an analog voltage signal representing impedance changes of the antenna in the first time window. The electronic device determines a variation in a transmit power level of the wireless communication component from a specified power level, and adjusts digital samples by an adjustment amount. The electronic device determines, using the adjusted digital samples, a user input event caused by a presence of an object in proximity to the antenna. The processing device performs an action in response to the user input event.

Claims20

Dependent claims

A wireless device comprising:

an antenna;
a radio coupled to the antenna, the radio to send radio frequency (RF) signals to the antenna to radiate electromagnetic energy in a first time window;
a processing device coupled to the radio, the processing device comprising an analog-to-digital converter (ADC) and detection logic;
a detection circuit coupled between the radio and the antenna, the detection circuit to output an analog voltage signal to the ADC of the processing device to generate an Antenna as Sensor (A2S) signal in the first time window, the A2S signal representing impedance changes of the antenna, wherein:
the detection logic is to receive the A2S signal from the ADC;
the detection logic is to determine that a first power level of a transmit power of the radio is different than a second power level of the transmit power, the second power level being a default power level;
the detection logic is to adjust the A2S signal by a first adjustment amount corresponding to the first power level to obtain an adjusted A2S signal;
the detection logic is to determine, using the adjusted A2S signal, a user input event caused by a presence of an object in proximity to the antenna;
and
the processing device is to perform an action in response to the user input event.

7 more elements

An electronic device comprising:

a wireless communication component coupled to an antenna via a radio frequency (RF) path;
one or more processors coupled to the wireless communication component;
and
one or more computer readable media storing processor executable instructions which, when executed using the one or more processors, cause the electronic device to perform operations comprising:
sending RF signals to the antenna via the RF path in a first time window;
receiving an analog voltage signal representing impedance changes of the antenna in the first time window;
determining a variation in a transmit power level of the wireless communication component from a specified power level;
adjusting digital samples of the analog voltage signal by an adjustment amount corresponding to the variation in the transmit power level to obtain adjusted digital samples;
determining, using the adjusted digital samples, a user input event caused by a presence of an object in proximity to the antenna;
and
performing an action in response to the user input event.

8 more elements

A method of operating a device, the method comprising:

sending radio frequency (RF) signals to an antenna to radiate electromagnetic energy in a first time window;
receiving an analog voltage signal representing impedance changes of the antenna in the first time window;
determining a variation in a transmit power level from a specified power level for sending the RF signals;
adjusting digital samples of the analog voltage signal by an adjustment amount corresponding to the variation in the transmit power level to obtain adjusted digital samples;
determining, using the adjusted digital samples, a user input event caused by a presence of an object in proximity to the antenna;
and
performing an action in response to the user input event.

4 more elements

Dependencies are inferred from the claim text.