The Processing Of UHF Multiple Protocols RFID Baseband Signal Based On FPGA

With the development of the electronics and seeping into different industries, numerous traditional industries are getting brand new. Bar code, as the forthgoer of the auto-reorganization, is widely used in all the industries for its low cost. But bar code can no longer catch the development of the society because of its disadvantages such as flimsy, slow in reading, and low in storing data.RFID (Radio Frequency Identificatioin) technique makes up the disadvantages and suits the society very well. RFID tag has the advantages of large data capacity, long useful life, and reusable. It can support fast reading and writing, moving recognization, multiple tags recognization, location and long term management. The most important thing is that RFID technique can be connected with the internet and form a thing-to-thing net. In this way, people can control all the information of the relative things around the world. The application of RFID technique to different industries can improve the management and operation efficiency and reduce the cost of operation. So the proposed RFID research, which is the core part of the net of things, is very meaningful.The proposed research is to realize the three UHF protocols based on FPGA. It combines the three UHF protocols together and switchs automatically according to different kind of tags. To improve the reading tag speed, two algorithms:ST-DFSA and CRC-FSA are proposed based on EPC protocol which is the most potential one. In the aspects of signal precessing, flexible method is employed to remove the noise like burr signal. This guarantees the success of the latter signal processing.In this thesis, the research is introduced in detail from the analysis to the design of hardware testbench, from the proposed anti-collsion algorithms to the design of the three protocols. The key points and supporting theory are also provided in the thesis.