Application of CDMA for anti-collision and increased read efficiency of multiple RFID tags

This research presents analysis and demonstration of the application of code-division multiple access (CDMA) to radio frequency identification (RFID), particularly for the simultaneous reading of multiple RFID tags. The research investigates current techniques and algorithms for resolving collisions among multiple tags while they are transmitting simultaneously. Typical store and warehouse environments under possible worst-case scenarios have been studied. The result of this research is the recommended implementation of a CDMA RFID method of reducing the number of reads and the removal of some inter-tag interference.