Research On Anti-collision Algorithm For Sensor-based Blind Source Separation Based On MIMO

With the development of communication and computer technology,Internet of Things technology and people's lives,work and entertainment become more and more dense.Radio frequency identification(RFID)is an automatic identification technology of non-contact identification by radio frequency signal.It is one of the key technologies in the identification of Internet of Things.Along with the extensive application of RFID technology,How to ensure that the need to identify multiple labels at the same time the system efficiency has become an urgent problem in the application process.Tag anti-collision is the research hotspot of RFID technology.When multiple electronic tags respond to the reader at the same time,the signals between the electronic tags will interfere with each other.The reader can not correctly recognize the label information and label the collision.The traditional anti-collision algorithm can not guarantee the system has high throughput,which makes the recognition efficiency of the system very low,can not meet the practical application requirements.Solving the collision between labels is the main content of this paper.The paper first introduces the basic concept,development status,application prospect and basic principle of RFID technology,Then,the existing two types of RFID tag anti-collision algorithms are described in detail: tree-based algorithm and ALOHA-based algorithm.The principle,implementation and performance of the two algorithms are studied,and the typical algorithms are simulated and compared.Then the principle and model of blind source separation technology are introduced,and a commonly used blind source separation method is introduced,which is independent component analysis.This paper mainly from the signal layer point of view,carried out and completed the RFID tag anti-collision blind source separation algorithm research And a new anti-collision algorithm is proposed to improve the anti-collision algorithm of the RFID system based on the blind source separation technology.The experimental results show that the improved anti-collision algorithm can separate the sensor tag signal more quickly.In the case of the same number of reader antennas,the maximum throughput is more than 40% higher than the current blind separation label anti collision algorithm.