基于PSK声通信的无线传感器网络节点设计

可用于无线传感器网络的声信号通信方式,不占用无线电通信频率带宽,无射频干扰,在诸如环境监测、军事侦测等领域有广泛的应用前景。研究了一种基于相移键控(PSK)调制声通信的无线传感器网络节点系统。节点系统采用ARM+FPGA的结构,核心控制器为具有低功耗休眠模式的STM32型ARM芯片,FPGA用于进行数据缓存和部分数据处理,采用PZT型扬声器实现声信号的收发。测试表明:节点系统可以在10m范围内进行数据通信,数据码率300bps,误码率小于10-3,系统最大功耗小于0.1 W,最低休眠功耗小于10μW。

WSNs node design based on PSK acoustic communication

Acoustic signal communication can be used for wireless sensor networks （WSNs）,which do not take up radio communication frequency bandwidth and no RF interference,it has a wide application prospect in areas such as environmental monitoring,military detection and other fields.Research a WSNs node system which based on PSK modulated acoustic communication.Node system uses ARM ＋ FPGA structure,core controller is a STM32 ARM chip which has low power consumption sleep mode,FPGA is used for data caching and partial data processing,PZT-type speaker is used to achieve acoustic signal transceiver.Tests show that node system can carry out data communication within 10 m,data rate is 300 bps,bit error rate（BER） is less than 10-3,maximum power consumption of system is less than 0.1 W,lowest sleep power consumption is less than 10 μW.