United States Patent
11,763,108
Title
Radio Frequency Identification Discontinuity Correction
Abstract
Radio frequency identification discontinuity correction is provided by calculating a phase-time slope for a Radio Frequency Identifier (RFID) signal received from an RFID tag; estimating, based on the phase-time slope, a predicted phase reading for the RFID signal at a given time; and in response to detecting a phase discontinuity based on a difference between the predicted phase reading and an actual phase reading for the given time, adjusting a calculated distance to the RFID tag. The calculated distance may indicate that the RFID tag is inside of or outside of a designated zone, and that a motion of the RFID tag indicates travel towards or away from the designated zone, which may be used to add or remove an item associated with the RFID tag to an ongoing item list.
