Uhf Rfid Anti-collision Algorithm

Along with the radio frequency identification (RFID) development and progress, RFID products used more widely, especially UHF method RFID technology research is the hot recent research at home and abroad, our country in low frequency and high frequency RFID technology has more mature, the product is widely used in preliminary studies and UHF stage, the Chinese government attaches great importance to the UHF standards and chip research and development.This paper introduces the working principle of RFID system, systematic classification and related technology, discusses the RFID system in common use prevent collision algorithm, its performance to carry on the detailed analysis and studies; A deep research on the RFID system current UHF Class 1 GEN2 standard EPC standard of prevent collision with algorithm for its prevent collision process is described in detail; Use of Matlab software system modeling of UHF RFID.Classl standards in further analysis based on the arithmetic of prevent collision, this paper brings forward a dynamic binary search algorithm, by the main ideas of the algorithm in detail, use of Matlab software modeling experiment, and verifies the large tag occasions, this algorithm is better than Classl standards can dramatically reduce the search for reading and writing, reducing the number of identifying time, improve recognition efficiency.