射频识别技术(Radio Frequency Identification,RFID)是通过发射和接收射频信号的方式来对目标对象进行识别,并由此获取目标对象的相关参数的技术。随着UHF RFID技术被应用于越来越多的领域,为了能够更加快速地适应各种应用需求,论文将U...射频识别技术(Radio Frequency Identification,RFID)是通过发射和接收射频信号的方式来对目标对象进行识别,并由此获取目标对象的相关参数的技术。随着UHF RFID技术被应用于越来越多的领域,为了能够更加快速地适应各种应用需求,论文将UHF RFID标签数字基带以SOC的形式实现。在整个数字基带设计中,标签的物理链路层通过硬件实现,包括FM0/Miller编码模块,PIE解码模块、CRC编码/校验模块等。同时,标签识别层通过使用开源RISC-V内核蜂鸟E203和部分硬件设计共同完成。经过验证,论文设计能够在FPGA上成功运行并符合ISO/IEC_18000-6C协议[1]中规定的通信流程。展开更多
A priori knowledge of the number of tags is crucial for anti-collision protocols in slotted UHF RFID systems.The number of tags is used to decide optimal frame length in dynamic frame slotted ALOHA(DFSA)and to adjust ...A priori knowledge of the number of tags is crucial for anti-collision protocols in slotted UHF RFID systems.The number of tags is used to decide optimal frame length in dynamic frame slotted ALOHA(DFSA)and to adjust access probability in random access protocols.Conventional researches estimate the number of tags in MAC layer based on statistics of empty slots,collided slots and successful slots.Usually,a collision detection algorithm is employed to determine types of time slots.Only three types are distinguished because of lack of ability to detect the number of tags in single time slot.In this paper,a physical layer algorithm is proposed to detect the number of tags in a collided slot.Mean shift algorithm is utilized,and some properties of backscatter signals are investigated.Simulation results verify the effectiveness of the proposed solution in terms of low estimation error with a high SNR range,outperforming the existing MAC layer approaches.展开更多
文摘射频识别技术(Radio Frequency Identification,RFID)是通过发射和接收射频信号的方式来对目标对象进行识别,并由此获取目标对象的相关参数的技术。随着UHF RFID技术被应用于越来越多的领域,为了能够更加快速地适应各种应用需求,论文将UHF RFID标签数字基带以SOC的形式实现。在整个数字基带设计中,标签的物理链路层通过硬件实现,包括FM0/Miller编码模块,PIE解码模块、CRC编码/校验模块等。同时,标签识别层通过使用开源RISC-V内核蜂鸟E203和部分硬件设计共同完成。经过验证,论文设计能够在FPGA上成功运行并符合ISO/IEC_18000-6C协议[1]中规定的通信流程。
基金This work was supported in part by the National Natural Science Foundation of China under project contracts[NOS.61601093,61791082,61701116,61371047]in part by Sichuan Provincial Science and Technology Planning Program of China under project contracts No.2016GZ0061 and No.2018HH0044+2 种基金in part by Guangdong Provincial Science and Technology Planning Program of China under project contracts No.2015B090909004 and No.2016A010101036in part by the fundamental research funds for the Central Universities under project contract No.ZYGX2016Z011in part by Science and Technology on Electronic Information Control Laboratory.
文摘A priori knowledge of the number of tags is crucial for anti-collision protocols in slotted UHF RFID systems.The number of tags is used to decide optimal frame length in dynamic frame slotted ALOHA(DFSA)and to adjust access probability in random access protocols.Conventional researches estimate the number of tags in MAC layer based on statistics of empty slots,collided slots and successful slots.Usually,a collision detection algorithm is employed to determine types of time slots.Only three types are distinguished because of lack of ability to detect the number of tags in single time slot.In this paper,a physical layer algorithm is proposed to detect the number of tags in a collided slot.Mean shift algorithm is utilized,and some properties of backscatter signals are investigated.Simulation results verify the effectiveness of the proposed solution in terms of low estimation error with a high SNR range,outperforming the existing MAC layer approaches.
