Patent ID: 11949628
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electronic device comprising:
millimeter wave (mmWave) frequency front-end circuitry configured to operate in a mmWave frequency range; and
a baseband processor comprising:
an Orthogonal Frequency Division Multiplexing (OFDM) physical layer, wherein the OFDM physical layer uses one of a plurality of subcarrier structures to communicate data to a second device in the mmWave frequency range, wherein the electronic device is worn by a user; and
a controller coupled to the OFDM physical layer, wherein the controller:
determines a received signal strength indicator (RSSI) value associated with a wireless channel between the electronic device and the second device, wherein the RSSI value is indicative of a physical distance between the second device and the electronic device;
determines phase value associated with the wireless channel;
determines a first state of motion of the electronic device based on the RSSI value being within a first range of values and the phase value being within a second range of values and sends the data to the second device using a first subcarrier structure of the plurality of subcarrier structures; or
determines a second state of motion of the electronic device based on the RSSI value being within a third range of values greater than the first range of values and the phase value being either less than or greater than the second range of values and sends the data to the second device using a second subcarrier structure of the plurality of subcarrier structures; or
determines that the electronic device is in a third state of motion and sends the data to the second device by alternating between the first subcarrier structure and the second subcarrier structure at a fixed interval.