Biography
Enrollment Date: 2010
Graduation Date：2013
Degree：M.S.
Defense Date：2013.05.28
Advisors：Chun Zhang
Department：Institute of Microelectronics，Tsinghua University
Title of Dissertation/Thesis：Design of RFID Reader Digital Baseband for Multi-protocol
Abstract:
Radio Frequency Identification (RFID) is a wireless radio frequency identification technology. In a certain sense, it is similar to the barcode which we have seen with our day-to-day shopping. But because it is electronic products, it is very different to the barcode in means of communication and application of the principle. It has a lot of advantages which a bar-code does not have. Such as Automatic Identification, penetrate obstacles, scalable multi-function. Therefore, there are a wide range of applications in production, logistics, transportation and many other fields. The paper systematically introduces the RFID-related knowledge and application, classification and technical characteristics. There are two series of protocol standards of ISO / IEC and Global in the high frequency range. Thesis focused on introducing and analyzing three protocols of ISO / IEC 18000-6C, the protocol of G1 and a custom V Tag communication protocol which are supported by this paper . A RFID reader digital baseband which supports multi-protocols is designed and studied in this paper. The digital baseband section includes the MPU, the protocol processing module and the digital signal processing module. This design develops the mechanism of access the memory, extends the interrupts and GPIO based on the DW8051 IP soft-core and configures the other modules in accordance with the relevant application requirements. The main function of the digital signal processing module is to do operation of quantify, filtering, orthogonal transform and interpolation to the signal which is outputted from the protocol processing module according to the protocol requirements of the transmission bit rate, the depth of modulation and the modulation mode. Then the signal is sent to the RF module.The protocol processing module is designed in the paper. Its function is data encoding and decoding, protocol processing and parameters controlling of other modules. In structure of the circuit the protocol processing module comprises a register stack, the transmit path, the receive path and interrupt handling module. It features to support multi-protocol, which is the focus and difficulty of this design. The transmit and receive path which can be configured are designed, the circuit parameters can be set as desired. And the parameters are controlled by registers in circuit. In order to facilitate the management and to read and write to these registers, the register stack is designed. In addition, the other circuits in the protocol processing module such as a CRC checksum, the transmit and receive FIFO module are designed.On the basis of the design of the MPU, protocol processing and digital signal processing of these three modules, a complete digital baseband is built and verified on the FPGA. A verification process is developed. The paper gives a more detailed description of it, and it can be used as an application example. The validation process is downloaded to the FPGA external E2PROM. The results show the function is right.