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Digital Baseband Design for UHF RFID Reader and Anti-collision Arithmetic Research

Author: XuJing
Tutor: WangChunHua
School: Hunan University
Course: Information and Communication Engineering
Keywords: UHF RFID Reader Chip ISO/IEC18000-6B Digital baseband Anti-collision algorithm
CLC: TP391.44
Type: Master's thesis
Year: 2011
Downloads: 20
Quote: 1
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Abstract


With the development of science and technology, the society has entered aninformation age. Information technology has penetrated into all areas of the nationaleconomy. Ultra high frequency radio frequency identification (UHF RFID)technology is the product of the information technology, and it’s affecting andchanging people’s daily life.Nowadays, UHF RFID technology has obtained a rapid development not only intheory but also in practice, and the implementation of UHF RFID reader is becominga research focus. After reading a lot of papers, we found that the implementation ofthe baseband in the traditional UHF RFID reader is implemented by discretecomponent, which does not conform to the integration development tendency of UHFRFID reader. In view of this question, this paper has designed one kind of UHF RFIDreader digital baseband chip. In addition, there is tags conflict problem in UHF RFIDsystem, which not only affects the normal read and write of tags, but also affects therecognition efficiency of the whole identification system. Therefore, in this paper, onekind of highly effective anti-collision algorithm has been proposed.The main work and innovation are as follows:(1) A digital baseband chip for UHF RFID reader based on ISO/IEC18000-6Bprotocol has been designed. Based on deeply research on ISO/IEC8000-6B protocol,this paper has carried on the module division of the entire baseband system, andproposed the whole design frame of the digital baseband system. Then the realizationof the baseband system’s control module has been researched, moreover, the encodingand decoding module, CRC checksum module, have been mainly described. On thisbasis, based on the Chartered0.18μm process, with Synopsys DC tools, the basebandchip front-end design has been carried out. The baseband chip back-end physicaldesign has been carried out by using Soc Encounter tools. The physical verification ofthe baseband chip has been carried out by using Calire tools as well. Finally, we gotthe whole chip’s layout file.(2) An improved anti-collision algorithm for tag identification in RFID systemshas been proposed. The bit collision detection is adopted, which reduces theprobabilities of collision effectively. Moreover, the stack is also used, which reducesthe total times of identification and improves the efficiency. The arithmetic can accurately determine where a collision arises, and only the data from collision bit isneeded, then the transferred data is reduced. Finally, using Micosoft VC6.0simulation software, we have made a detailed simulation for the proposed algorithmand the superiority of the proposed anti-collision algorithm has been verified as well.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Optical pattern recognition devices
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