A SDR Prototype for Backscatter Sensor Networks

A SDR Prototype for Backscatter Sensor Networks
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反向散射传感器网络的 SDR 原型

DOI:
10.14257/ijfgcn.2016.9.10.27
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发表时间:
2016-10
影响因子:
--
通讯作者:
鄢婷婷
鄢婷婷
中科院分区:
--
文献类型:
--
作者:
莫金容;胡圣波;吕峰;施燕峰;鄢婷婷

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低成本、低功耗是后向散射传感器网络得到广泛应用的重要原因之一。基于LabVIEW和USRP平台,提出并实现了一个简单的、可配置的后向散射传感器网络SDR原型。该软件无线电原型系统能够以较低的功耗应用于多传感器环境。该原型由可配置的后向散射收发器与零差接收机和传感器节点。通过采集无线射频能量和唤醒传感器节点,有效降低系统功耗。提出了子载波可配置的频分多址接入方法,给出了避免传感器间碰撞的感知数据脉冲周期约束条件,并进行了证明。分析了原型系统的性能,给出了对数正态信道下中断概率的解析解,并进行了证明。最后通过实验和仿真验证了软件无线电原型系统的有效性和可行性。EVM值小于2.8%,数值分析和蒙特卡罗模拟之间的中断误差的概率小于1.86%。
Low cost and low power is one of the important reasons in the wide application of backscatter sensor networks. Based on LabVIEW and USRP platforms, this paper presents and implements a simple and configurable SDR prototype for backscatter sensor networks. The SDR prototype can apply to the multi-sensor environment with low power. The prototype consists of configurable backscatter transceiver with homodyne receiver and sensor nodes. It can reduce the power consumption of system efficiently through harvesting wireless RF energy and waking sensor nodes. The frequency division multiple access method with configurable sub-carrier is proposed, and the constraint conditions of sensing data pulse period for avoiding collision among sensors are presented and proved in this paper. The performance of the prototype is analyzed, and the closed-form solution of the probability of outage under the log-normal channel is also given and proved. Finally, the experiment and simulation show the SDR prototype is effective and feasible. The EVM value is less than 2.8%, and the probability of outage error between numerical analysis and Monte Carlo simulation is less than 1.86%.
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