Application Of ICA Algorithm In RFID System

With the development of the wireless communication technology andmicroelectronics technology, Radio Frequency Identification Devices (RFID)technology has matured. Because of (Owing to) its high-capacity, high reliability, andmany other advantages in the field of logistics management, access control systems,automatic toll efficient, the RFID industry has become one of the most promising andenergetic industries in the21st century and the RFID technology has become ahotspot of international research and development as well.RFID technology has been widely used at present, however, the vast majority ofRFID communication is TDMA communication mode，which is easy to collide andleads to the tags to be read-written in failure. Although the anti-collision algorithmhas been used, the traditional Aloha algorithm has its defects in low rate of throughputand slow reading speed, which restrict the application and promotion of RFIDtechnology. As to the problem of anti-collision in the communication process of radiofrequency identification technology, this paper puts forward the anti-collisionseparation technique based on blind source parallel processing algorithms from theperspective of signal processing. The function simulation shows: comparing with thetraditional Aloha algorithm, the new algorithm significantly improves theanti-conflict capabilities, as well as the feasibility of blind signal processingtechniques in the anti-conflict management.Firstly, this paper introduces the development background, the research statushome and abroad, and the development trends of radio frequency identification (RFID)technology, as well as the RFID system structure and the basic theory of RFcommunication and digital communication. Secondly, it systematically introduces thetheory of independent component analysis and several commonly used ICAalgorithms and simulates fast fixed point algorithm. Then, the paper introducesCDMA technology and gives a primary explanation on direct sequence spreadspectrum technology principle and the PN code generation principle. At the same time,it analyses timing simulation and the relationship of error rate in direct sequencespread spectrum communication and signal to noise ratio, and deduces the ICA modelof DS-CDMA signal. Finally, the paper analyses the problems of RFID anti-collisionalgorithm, and gives the throughput analysis and simulation on Aloha algorithm.According to the problems existing in Aloha algorithm, this paper puts forward parallel to the negative entropy-based fast fixed point ICA anti-collision algorithm.Through the simulation analysis and demonstration, it can be seen that this algorithmcan effectively separate the signal from the mixed signal. By comparison with Alohaalgorithm, this algorithm has improved a lot in the throughput rate.