摘要
针对需要低比特率和超低成本传感器的无线传感器网络(WSN),提出了一种基于后向散射无线电和软件定义的通信体系结构,它由实现射频载波生成、零差检测和复杂信息处理的中心Hub和具有载波调制功能的传感器构成。前者构建了一种软件定义的收发器来发送载波和接收来自于各个传感器的反射,并提取和处理它们发送的信息;后者每个传感器的发射机被简化为一个连接到天线上的晶体管,且每个传感器的设计都围绕着一个驱动低功率射频(RF)开关的低功率微控制器进行,实现传感器的信息被调制到其唯一的子载波上;从而建立起一个完整的后向散射无线电链路通信系统,实现每个传感器和中心Hub之间的通信;基于理论的仿真结果和原型机的实验结果表明,提出的WSN通信系统不仅能够实现较大范围的可靠通信和数据传输及处理,而且具有低复杂度和超低成本。
A communication architecture based on backscattering radio and software definition is proposed for WSNs which require low bit-rate and ultra-low cost sensors.It consists of a central Hub for RF carrier generation,homodyne detection and complex information processing,and sensors with carrier modulation function.In the former,a software-defined transceiver is constructed to transmit the carrier and receive the reflection from various sensors,and extract and process their transmitted messages.In the latter,the transmitter for each sensor is simplified as a transistor connected to an antenna and each sensor is designed around a low-power micro-controller driving a low-power RF switch,and the information from each sensor is modulated onto its unique subcarrier.Thus,a complete backscattering radio link communication system is established to achieve communication between each sensor and the center Hub.The simulation results based on the theory and the experimental results from the prototype show that the proposed WSN communication system not only achieves a wide range of reliable communication and data transmission and processing,but also has low complexity and ultra-low cost.
作者
刘强
Liu Qiang(Guangdong University of Finance and Economics,Guangzhou 510320,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2020年第6期41-47,共7页
Journal of Electronic Measurement and Instrumentation
基金
教育部高等教育司2018年第一批产学合作协同育人项目(201801194058)资助。
关键词
通信
无线传感器网络
后向散射无线电
最小频移键控
子载波
误码率
communication
wireless sensor network
backscattering radio
minimum shift keying
subcarrier
bit error rate
