Research On The Impacts Of Multi-tag Identification Of RFID System Under Wireless Interference

Radio frequency identification(RFID)is the key technology of internet of things(IOT)which also plays an important role in constructing the aware network.In recent years,with the rapid progress of the internet and mobile internet,the applications related to RFID has been developed unprecedentedly.However,this also brings the problem of the wireless interference as the large-scale deployment of RFID systems and wireless network such as WPAN(Bluetooth,ZigBee,etc.),WLAN and so on which lead to the degradation of performance.It is necessary to analyze the interference of the RFID system for the development and evolution of RFID technology.In this paper,the interference of RFID system was researched by using the method of mathematical modeling,theoretical analysis experimental measurement and simulation.The key technology of RFID interference was explored and complemented,and the main innovations are as follows:1.The interference of the environment where large-scale RFID systems are deployed was studied by establishing the interference model based on statistical distribution.The parameter IR was defined innovatively to describe the decline of the performance,which provides a theoretical reference.Further modifications were applied to the model to fit the standards of FCC and CEPT,which can be used to estimate the capacity of multi-reader environment.2.The algorithm of multi-tag identification based on the protocol of EPC was analyzed.A new algorithm was proposed based on the research of Q-selected algorithm and Poisson algorithm which increase the multi-tag identification of RFID especially in the scenario of a large number of tags.3.A new method based on the analysis of tag-circuit and back-scatter link was proposed in analyzing the performance of RFID under interference,which solve the vague of this issue.4.The problem of the interference between RFID and other wireless communication system was studied.The interference model of RFID with Bluetooth and WLAN was established,which proved to be correct by the simulation of OPNET and MATLAB.The wireless interference of RFID system was analyzed,which complemented previous study of this problem.The method used and conclusion got in this paper provide some theoretical references to the problem of interference in RFID.