无源物联网的编码技术研究  

Coding technology of passive internet of things

作　　者：杨义冰 许荣涛 陈霞 王公仆[1] 艾渤 YANG Yibing;XU Rongtao;CHEN Xia;WANG Gongpu;AI Bo(School of Computer and Information Technology,Beijing Jiaotong University,Beijing 100091,China;School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100091,China;The State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100091,China)

机构地区：[1]北京交通大学计算机与信息技术学院,北京100091 [2]北京交通大学电子信息工程学院,北京100091 [3]北京交通大学轨道交通控制与安全国家重点实验室,北京100091

出　　处：《物联网学报》2023年第3期24-31,共8页Chinese Journal on Internet of Things

基　　金：国家重点研发计划(No.2021YFB3901302)。

摘　　要：无源反向散射通信技术能让传感器摆脱电池的束缚,避免繁杂的人工维护,有效降低传感器的成本。无源反向散射通信技术已被认为是实现无源物联网的关键技术之一。由于无源传感器节点资源受限,如何利用编码技术提高系统可靠性成为无源物联网的挑战性难题。聚焦无源物联网无源节点的编码和解码技术,首先,系统阐述传统信道编码发展历程,以及现有的RFID信道编码解码方案;然后,选择适合无源反向散射通信技术的3种编码方案;最后,仿真比较这3种编码方案的性能并总结优缺点。Passive backscatter communication can free wireless sensors from limited-life batteries and heavy manual maintenance,and will also reduce their hardware cost.Passive backscatter communication is one of the key technologies to realize the passive internet of things(IoT).Due to the limited resources of passive sensor nodes,how to use coding technology to improve system reliability has become a challenging problem for passive IoT.The coding and decoding technologies of passive nodes in the passive IoT were focused on.Firstly,the development history of traditional channel coding and the existing RFID channel coding and decoding schemes were systematically expounded.Then,three suitable coding schemes were selected for passive backscatter communication technology.Finally,the performance of these three encoding schemes were compared by simulation and the advantages and disadvantages were summarized.

关 键 词：无源物联网 反向散射 编码 

分 类 号：TN919[电子电信—通信与信息系统]