Patent ID: 11959997
Assignee: MAGIC LEAP, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 18:
19. A wearable system comprising:
a first device comprising one or more receiving antennas, each receiving antenna configured to receive radar signals, and one or more processors;
a second device comprising one or more transmitting antennas, each receiving antenna configured to transmit radar signals;
wherein the one or more processors of the first device are configured to perform a method comprising, at the first device:
while in a first mode, transmitting a first signal and receiving a second signal, the second signal comprising a reflection of the first signal by a second device;
determining, based on the received second signal, a position of the second device relative to the first device;
transitioning from the first mode to a second mode, wherein transitioning from the first mode to the second mode comprises discontinuing transmitting the first signal;
while in the second mode, forgoing transmitting the first signal, and further while in the second mode, receiving a third signal from the second device, wherein the third signal is not provided by the second device in response to a signal from the first device; and
determining, based on the third signal, an orientation of the second device relative to the first device,
wherein:
the third signal corresponds to an antenna of the one or more transmitting antennas,
determining the position of the second device relative to the first device comprises determining a translation matrix relating a position of the second device to a position of the first device, and
determining the orientation of the second device relative to the first device comprises determining a ratio of a signal power of the third signal to an expected maximum signal power of the antenna to which the third signal corresponds.