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Min Li

Biography

Enrollment Date: 2002

Graduation Date：2005

Degree：M.S.

Defense Date：2005.06.14

Advisors：Zhihua Wang

Department：Institute of Microelectronics，Tsinghua University

Title of Dissertation/Thesis：Protocol Analysis and Circuit Design of RFID System Based on Spread Spectrum Technique

Abstract:
During the last decade, with the rapid processing of CMOS technology, Radio Frequency Identification (RFID) system is applied in more and more areas, such as supply-chain management, inventory control, automobile manufacturing, etc. However, the broadened application and long distance communication of RF tags brings reliability and security risks. On the condition of long distance communication, transponders can hardly detect Tag-to-Interrogator Link signals or demodulate correct data due to noise, interference, interception and multipath effects. It may cause high bit error rate, low reliability, and transmitted data lost in RFID system. And the eavesdropping into radio communications and replaying the data of RFID tag information is a threat for security of a RFID system. This paper analyzes the existing RFID system communication protocols, and proposes a RFID communication protocol and system structure with Direct-Sequence Spread Spectrum (DSSS) technique which focuses on the reliability and security of RFID tag-to-interrogator communication. Considering the requirement of low cost and power dissipation in RFID tag, m-sequence is selected as the spreading sequence in the protocol. The proposed communication protocol can be easily embedded into all the exiting RFID standards. This paper compares existing RFID systems with RFID systems with DSSS, and simulates the performances of these systems. Implement of the DSSS technique in a RFID tag is described in this paper. The scheme is embedded into a practical RFID standard, which is established based on ISO/IEC18000-6A Standard. The practical RFID standard is analyzed in detail in this paper. In this design, the command functions are successfully realized, meanwhile, the circuit scale and area spending is controlled. The integrated design of the tag is fabricated in this paper, using 0.18um CMOS technology. Detailed testing schemes for both the protocol functions and DSSS system performances are proposed in this paper. The RTL codes for the tag’s digital part have been verified on FPGA test board. FPGA testing results shows the digital part works well. After that, to test the whole RFID system with DSSS technique, a testing system is built. Under the testing result, it is proved that the bit error rate of tag-to-interrogator link is significantly reduced in the proposed RFID system with DSSS technique, and communication reliability is improved.

Publications

Papers：：

[1] Wentao Yang , Kai Zheng, Hualiang Ren, Shengxing Wang, Mingsheng Sun, Wangde Zhang, Chunmin Li, Hanjun Jiang, Three-dimensional laser scanner as a new tool for measuring lower limb volume in patients with chronic venous diseases, Journal of Vascular Surgery: Venous and Lymphatic Disorders, Vol.11, No.1, pp.127-135, 2023.

[2] Yichun Wu, Qiuyi Gu, Jincheng Yu, Guangjun Ge, Jian Wang, Qingmin Liao, Chun Zhang, Yu Wang, MR-GMMExplore: Multi-Robot Exploration System in Unknown Environments based on Gaussian Mixture Model, ROBIO 2022, pp.1198-1203, 2022.

[3] Timin Li, Dongmei Li, A Wide-Input-Range Multi-phase Clock Generator Design for CMOS Image Sensors, ICCSS 2022, pp.91-96, 2022.

[4] Weitao Li,Fule Li,Changyi Yang,Minzeng Li,Zhihua Wang, A power-efficient reference buffer with wide swing for switched-capacitor ADC, Microelectronics Journal, Vol.46, No.5, pp. 410 - 414, 2015.

[5] Minzeng Li,Fule Li,Chun Zhang, Pixel-level A/D Conversion Using Charge Reset Technique, Semiconductor Technology, Vol.39, No.9, pp. 656 - 660+665, 2014.

[6] Minzeng Li,Fule Li,Chun Zhang,Zhihua Wang, Pixel-level A/D conversion using voltage reset technique, Journal of Semiconductors, Vol.35, No.11, pp. 115009-1-5, 2014.

[7] Qiuling Zhu,Chun Zhang,Xiaohui Wang,Zhongqi Liu,Yongmin Li,Zhihua Wang, ASIC Implementation of Low Power Baseband Processor for UHF RFID Tag, Semiconductor Technology, Vol.34, No.2, pp. 172 - 176, 2009.

[8] Wei Liu,Yongmin Li,Chun Zhang,Zhihua Wang, A Self-Adaptive Low-Voltage Current Mode ASK Demodulator for RFID Tags, Semiconductor Technology, Vol.34, No.1, pp. 10 - 13, 2009.

[9] Weifu Xie,Yongmin Li,Chun Zhang,Zhihua Wang, Design of a 780-930 MHz Low-Power / Low-Noise LCVCO, Microelectronics, Vol.38, No.3, pp. 407 - 410, 2008.

[10] Min Li,Jingchao Wang,Chun Zhang,Yongmin Li,Zhihua Wang, The Application of Spread Spectrum Technique Communication in Radio Frequency Identi-fication System, Microcomputer Information, Vol.24, No.4-2, pp. 209 - 211, 2008.

[11] Weifu Xie,Yongmin Li,Chun Zhang,Zhihua Wang, CMOS Implementation of an RF PLL Synthesizer for Use in RFID Systems, Chinese Journal of Semiconductors, Vol.29, No.8, pp. 1595 - 1601, 2008.

[12] Tianbao Gao,Jingchao Wang,Chun Zhang,Yongmin Li,Zhihua Wang, Design of a modulator and demodulator for UHF RFID readers, Chinese Journal of Semiconductors, Vol.29, No.7, pp. 1403 - 1406, 2008.

[13] Tianbao Gao,Jingchao Wang,Chun Zhang,Yongmin Li,Zhihua Wang, Design and realization of a portable RFID reader, Application of Electronic Technique, Vol.34, No.5, pp. 56 - 58, 2008.

[14] Xipeng Zhang,Yongmin Li,Chun Zhang, Integrated Image-Rejection Low-Noise Amplifier Design Techniques, Microelectronics & Computer, Vol.24, No.6, pp. 18 - 20, 2007.

[15] Rongrong Bai,Yongmin Li,Chun Zhang,Zhihua Wang, A low power, large dynamic range 915MHz passive RFID tag, Chinese Journal of Semiconductors, Vol.28, No.8, pp. 1316 - 1319, 2007.

[16] Yike Cui,Baoyong Chi,Minjie Liu,Yulei Zhang,Yongmin Li,Zhihua Wang,Chiang Patrick, Process variation compensation of a 2.4GHz LNA in 0.18um CMOS using digitally switchable capacitance, ISCAS 2007, pp. 2562 - 2565, 2007.

[17] Jingbo Duan,Fule Li,Liyuan Liu,Dongmei Li,Yongmin Li,Zhihua Wang, A pipelined A/D conversion technique with low INL and DNL, ISCAS 2007, pp. 3391 - 3394, 2007.

[18] Ziqiang Wang,Baoyong Chi,Min Lin,Shuguang Han,Lu Liu,JinKeYao,Zhihua Wang, A monolithic CMOS L band DAB receiver, ASP-DAC 2005, pp. 1232 - 1235, 2005.