【摘要】 低成本、低功耗是无线传感网络得到普遍应用的重要原因。基于软件无线电技术、Lab VIEW和USRP(Universal Software Radio Peripheral)平台,提出并实现了一种面向多传感应用、无干扰可配置的后向散射无线传感网络架构原型,架构由可配置零中频接收的后向散射无线传感收发器和传感节点组成,通过无线射频能量获取和传感节点的射频唤醒,有效地降低了系统功耗。论述副载波可配置的频分多址接入方法,给出并证明了避免多传感器接入碰撞的传感数据脉冲周期约束条件。实验和仿真验证了提出架构的有效性和可行性,实验测试误差矢量幅度EVM值小于2.8%,且数值分析和Monte Carlo仿真验证间的中断率误差小于1.86%。更多还原

【Abstract】 Low cost and low power are important reasons of wide application of wireless sensor network. Based on Software Defined Radio,LabV IEW and USRP( Universal Software Radio Peripheral) platform,this paper presents and implements an architecture prototype for backscatter sensor networks which is multi-sensor-oriented applications,can be configured with non-interference. The architecture consists of configurable backscatter transceiver with homodyne receiver and sensor nodes. This work reduces the power consumption of system efficiently through wireless RF energy acquisition and waking sensor nodes. This paper presents frequency division multiple access method with configurable subcarrier,and the constraints of sensing data pulse period for avoiding collision among sensors are presented and proved. The result of experiment and simulation show the effectiveness and feasibility of the architecture. The EVM value is less than 2.8 percent,and the outage probability error between numerical analysis and Monte Carlo simulation is less than 1.86 percent.更多还原