Method and System for Estimating Error in Predicted Distance Using RSSI Signature

摘要

A localization method and system, including calculating a first distance estimate of a distance between a radio frequency identification (RFID) tag and a reader based on information associated with at least one of a plurality of response signals received from the RFID tag in response to interrogation signals by the reader at a plurality frequencies, measuring a signal strength of each of the received plurality of response signals to create a received signal strength indicator (RSSI) signature, predicting an error in the first distance estimate using the RSSI signature, and determining a final distance estimate of the distance by modifying the first distance estimate based on the predicted error.

主权项

1. A method for determining a distance between a radio frequency identification (RFID) tag and a reader, comprising:
transmitting, by the reader, a plurality of interrogation signals to the RFID tag at a plurality of frequencies; receiving, by the reader, a plurality of response signals from the RFID tag in response to the plurality of interrogation signals; calculating a first distance estimate of the distance based on information associated with the at least one of the plurality of response signals received; measuring a signal strength of each of the received plurality of response signals to create a received signal strength indicator (RSSI) signature; predicting an error in the first distance estimate using the RSSI signature; and determining a final distance estimate of the distance by modifying the first distance estimate based on the predicted error.