Design And Implementation Of Chinese Standards UHF RFID Tag's Baseband Compatible With TTO Mode

As the core technology of Internet of thing,radio frequency identification(RFID) has been paid increasing attention in the field of information technology.With strong support of government, research institutes and universities are actively promoting the development of RFID. With the independent standard of RFID being published,the domestic RFID's industry has entered a new stage of development.The Chinese UHF RFID air interface standard and the ISO/IEC 18000-6C standard adopt ITF(Talk First Interator) mode,in which the tag is completely under the control of the reader and the tag inventorying efficiency is low. To solve this problem, this paper realizes the recognition mechanism of TTO(Talk Only Tag) mode compatible with ITF mode by adding a Get_TTO_RN command and two new kinds of state transformation. In the scheme,tag sends identification information to reader at a random slot time in ready state.After receiving the Get_TTO_RN command with correct parameters,tag jumps to the open state. At this point, the reader has inventoried the specific tag successfully,the following accessing steps are as same as the ITF mode.By this way,the design implementates TTO mode and improves the inventorying rate without any changes of the ITF mode in the independent standard of RFID.In TTO mode, the tag should sent identification information to reader at a random slot time in ready state.How to realize the random time slot to meet the requirement of tag's anti collision is the key to achieve TTO mode.The paper proves that the number's randomicity of chaos random number generation algorithm is higher than the special seed and special clock shift algorithm and the control shift algorithm based on the CRC16 of tag's data. It can meet the requirement of this design and is used in it. Further more, the paper gives the system architecture and completes the design.Finally, the paper simulates the design of the independent standard tag chip baseband,finishes logic synthesis and post-synthesis simulation based on SMIC 0.18 ?m technology library, verifies tag chip baseband based on Xilinx FPGA, finalizes tag chip physical design,and completes static timing analysis with PT tool.The verification results show that the design can achieve TTO mode with improving the speed of reader inventorying tag,do all jobs of independent standard, switche correctly in both modes.As increasing function,the design increases area of 12.33 percent and reduces peak power of 16.95 percent over the common tag chip by the low power scheme. It increases the distance of the tag being identified. Thus, the design compatible with TTO mode has a strong competitive advantage.