Design And Implementation Of Passive Chip's Baseband For Wireless Sensor Platforms

Radio frequency identification(RFID)technology is an innovative technology for quickly identifying objects.Because of its advantages on strong anti-interference ability and high speed,it has been widely used in the counterfeit prevention,access control,and product manufacturing.The combination of RFID,sensing technology and switch state change technology can greatly expand the practical application fields of RFID,thus resulting in a great deal of research focus on IoT technology with high flexibility and reliability and low cost.This technology also faces many challenges in practical cases.For instance,the problem of perishable goods logistics needs to be considered due to the wide variety of products and presents different aspects of perishable characteristics in nowadays supply chain management.Therefore,considering the large product flow and long distances in the supply chain,eliminating a small percentage of corruption will lead to significant improvements in business.Considering the application similar to the above situation,the optimal management depends on the timeliness level.Therefore,this paper designs and implements a passive chip's baseband for wireless sensing platforms,providing real-time and efficient environmental information in a similarly perishable supply chain.In the application of fast moving tags or readers,fast inventory rate,low power consumption and far fields identification.,this paper has great advantages and practical value.The chip's baseband designed in this paper is for capacitive sensing platforms,because of its wide range of applications,the interface circuit can directly output digital signals and the CMOS process can print capacitive sensors and signal processing circuits on the same chip and other advantages.The baseband is used to quantify the data of the sensing interface,and the 5ms waveform is used to characterize the sensing data.Baseband is based on the ISO/IEC 18000-6C protocol,for the slow inventory rate problem,this paper uses a no-memory structure to simplify the protocol access group commands.And on the basis of the RTF access mode,by adding a custom command and a corresponding new state transition mode,the compatibility of the TTO inventory mode is completed,and the efficiency of the reader's single label inventory is improved.Relative standard 6C baseband,the baseband power consumption and area designed in this paper are reduced to 38.67% and 55.85%,respectively,and the effect is more obvious.Therefore,in today's applications where RFID tags or readers move fast and require feedback of environmental information,low power consumption,and long recognition distances,the chip's baseband designed in this paper has a greater advantage and application value.In the design and implementation process,the smic 0.18 ?m standard cell library was used.The paper verified the design of the chip's baseband for the sensor platform,FPGA tag model validation,the tag can communicate with the reader and the verification result meets the design requirements.Finally,the paper completed DC synthesis,layout design and integration verification with the analog front end,and generated the final tapeout data.