无芯片射频识别多标签的检测与识别

With the development of the Internet of Things, the society is growing demand for low-cost RFID tags for item identification. Chipless RFID tags are the possible solutions to meet this requirement. The project will explore various anti-collision mechanisms to simultaneously detect multiple chipless tags and identify each tag ID. It constructs reliable and efficient algorithm of multi-level collision avoidance and provides a theoretical basis for the design and application of chipless tag. The study includes: Chipless tag electromagnetic scattering theory based on the singularity expansion method (SEM), Construction of the anti-collision mechanism using analysis of time-pole and time-residue based on sliding window matrix beam algorithm, Exploration of the pole coding method for collision detection (avoidance) and maximum capacity, and Exploring the interrogating signal waveform which can stimulates the scattered echoes of specific poles on demand. A tag of this project is a single-layer conductor which can be pasted or printed onto an object for label. It has broad applicability with low cost, longevity, stain-resistance and anti-radiation. The data is retrieved by poles analysis of the late-time scattering signal from tag’s structure. It has the potential privacy and security.

随着物联网的发展，社会对用于物品识别的廉价RFID 标签需求越来越大，无芯片RFID 标签是满足该要求的可能解决方案。本项目探索能同时检测多个无芯片标签和识别每个标签ID 的多种防冲突机理，构造多层防冲突的可靠高效算法，为无芯片标签的设计和应用提供理论依据。研究内容包括：基于奇点展开法（SEM）的无芯片标签电磁散射分析理论，构建基于滑窗矩阵束算法的时间-极点、时间-留数分析的防冲突机制，探索可检（防）冲突的最大容量极点码，探索能按需激发特定极点散射回波的查询信号波形。本项目研究的标签是单层导体，可粘贴或印制到需要标签的对象，具有廉价、持久、抗污、抗辐射的广泛适用性。数据检索通过标签结构的后时散射信号极点分析进行，具有潜在的数据保密和安全性。

随着物联网的发展，社会对用于物品识别的廉价射频识别（RFID） 标签需求越来越大，无芯片RFID 标签是满足该要求的可能解决方案。本项目围绕设计防碰撞无芯片标签结构并对多标签的识别展开研究，内容包括无芯片标签的编码、结构、查询信号电路和防碰撞算法。取得的成果对基于电磁散射的无芯片 RFID 标签检测和防冲突机制有了系统全面的认识，提出设计这类无芯片RFID 系统的理论框架，对多种标签结构进行了分析，为开发廉价的 RFID 技术提供设计依据，从而为无芯片RFID 标签在物联网的广泛应用提供了参考基础。