SYSTEM AND METHOD FOR PRECISION AND RAPID REAL-TIME DETERMINATION OF REAL ESTABLISHMENTS OF RADIO FREQUENCY IDENTIFICATION LABELS (RFID) ASSOCIATED WITH ARTICLES IN A CONTROLLED AREA

摘要

A radio frequency identification tag (RFID) reading system (10) and a method for accurately and rapidly real-time determination of true deposits of RFID tags associated with articles in a controlled area. The main transmit and receive beams are oriented on the area, and multiple secondary receive beams are oriented substantially simultaneously to a plurality of pools in the area. The highest signal strength of the secondary receive signals from the secondary receive beams determines an approximate tag field of each tag. Two secondary receiving beams on opposite sides of the approximate label-in-elevation array are selected to obtain a pair of offset elevation signals, and two secondary receiving beams of opposite sides of the approximate azimuth label array are selected to obtain a pair of signals shifted azimuth. Shifted elevation signals and shifted azimuth signals are processed to determine a true bearing for each label in real time.