| Near Field Communication(NFC)technology is widely used in Io T sensor networks due to its advantages of high speed,good security and excellent anti-interference ability.With the high popularity of smart devices and the rapid development of the fifth-generation mobile communication technology(5G),the Internet of Everything is becoming a reality.With the continuous expansion of the application scope of the Internet of Things,the specifications of NFC are also constantly updated.The traditional NFC is based on the expansion and compatibility of the ISO/IEC 14443 protocol,and the latest fifth-generation NFC-V operation specification proposed in 2015 increases the use support for the protocol ISO/IEC15693 standard.When the communication distance of the NFC-V tag supporting the new protocol is increased to 1.5m,the anti-counterfeiting and security guarantee compatible with more working modes and application scenarios has become a new research direction.In view of the usage scenario and system architecture of NFC-V,combined with the workflow and command set of the communication protocol,this thesis proposes an anti-counterfeiting scheme to achieve anti-tampering by detecting whether the anti-counterfeiting wire is broken.The scheme achieves irreversible responses to tampering actions through memory and anti-counterfeiting wires.To a certain extent,it makes up for the lack of NFC-V tags in the anti-counterfeiting level.Based on the communication protocol and anti-counterfeiting scheme,this thesis proposes a low-power NFC-V anti-counterfeiting tag digital baseband circuit implementation method.The architecture of the digital baseband is designed with low power consumption,and then the functional module division and interface allocation are carried out.According to the content of the protocol,use Verilog to realize the function of the module,including:the realization of the high-reliability decoding algorithm circuit,the realization of the coding algorithm circuit of the continuous subcarrier,the realization of the CRC parallel calculation according to the characteristics of the protocol,the realization of the command parsing process,the command operation And the realization of the response process,etc.,and the functional correctness of the code is verified through simulation.Subsequently,under the TSMC 180nm process,a low-power strategy TCL script was written to perform logic synthesis on the RTL code,and the clock gating integrated unit of the process library was inserted into the netlist to achieve power optimization.After synthesis,the gating rate reached 77.31%.,the total power consumption is 25.52μW,and the total area is 35986μm~2.Finally,Encounter is used to physically implement the digital baseband circuit and extract parasitic parameters to complete static timing analysis and dynamic timing analysis,which proves the correctness and achievability of the design function.This thesis uses TI’s commercial reader chip and Xilinx’s FPGA development board to build an FPGA board-level verification platform for anti-counterfeiting NFC-V digital baseband circuits,and prototypes the design of the digital baseband.The response of commands and extended commands meets the design requirements.In the area of building intelligent sensor networks,the anti-counterfeiting label is not only limited to the anti-counterfeiting of the packaging box of valuable products.Since the 15693 communication protocol supports medium-distance response,the anti-counterfeiting line can be replaced by a safety wire in large electrical system.It has broad application prospects in the unique verification of regional connection nodes of some industrial control sensor monitoring networks such as large electrical equipment. |
