Anti-collision algorithm for RFID system with moving tags

For practical application,the tags of Radio Frequency Identification(RFID) system are often moving.An RFID system on a conveyor belt was analyzed and simulated using Matlab.The result showed that if the tag density on the conveyor belt D and the conveyor belt speed V were constant,the identification rate became the maximum when the frame size N was equal to the number of unidentified tags n.When the slot duration was constant,the identification rate was only relative with D and V,and would not be affected by the conveyor belt length L in reader's coverage.Meanwhile,the existing tag estimation methods were amended according to the model of conveyor belt and a new estimation method was proposed,which significantly improved the precision in the case of large number of tags compared to other estimating methods.