Abstract:

For ultra high frequency (UHF) radio frequency signals in the frequency range of 860-960 MHz,a novel RFID system anti-collision algorithm based on ICA and framed-slot is proposed. When the framed-slot number is rationally chosen,each slot contains tags less than or equal to its antenna number, thus several tags can be identified simultaneously by using ICA algorithm.Simulation results show that the tag identification rate of the proposed algorithm is obviously higher than that of the traditional anti-collision algorithms and the blind separation and dynamic bit-slot grouping anti-collision (BSDBG) algorithm. As antenna number increases, the tag identification time of the proposed algorithm is much less than that of the BSDBG algorithm.The algorithm further validates the feasibility and efficiency of the blind sources separation technology for tag identification.And it has potential application value in the engineering fields that require high efficient and intelligent management.

Key words: ICA;RFID;tag identification rate;blind sources separation;anti-collision algorithm