摘要
在室内环境中,墙壁的阻碍和反射会严重的影响无线传感网络中的信号传输特性。针对室内环境中传感节点的部署和应用的环境的特性,研究了无线信号在遇到墙壁反射时的传播特性,推导出了其对应的路径衰减。并基于视距传输和墙壁反射,提出了一种新的室内路径衰减模型。为了验证提出的路径衰减模型,针对室内房间和走廊环境,基于2.4 GHz载波频率,对无线传感节点的路径衰减和遮蔽效应进行了大量的实测实验。实验结果表明:提出的路径衰减模型可以很好地反映无线信号在室内的衰减特性。
Reflection and obstruction of wall severely influence transmission characteristic of signal in wireless sensor networks（ WSNs） in indoor environments. To circumvent this problem,analyze propagation characteristic of wireless signals suffering reflection of wall and derive path loss causing by wall. Then propose a novel indoor path loss modeling based on LOS and reflection. A number of experiments are executed based on 2. 4 GHz carrier frequency in indoor and corridor environments for verifying proposed path loss modeling. Experimental results demonstrate that the proposed path loss modeling can reflect loss characteristics of wireless signal in indoor.
出处
《传感器与微系统》
CSCD
2016年第12期11-13,16,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金面上资助项目(61172089)
中央国有资本经营预算支出项目(财企[2013]470号)
博士后基金面上资助项目(2014M562100)
湖南省科技厅资助项目(2015JC3053
2014WK3001)
关键词
无线传感网络
接收信号强度
反射
路径衰减
wireless sensor networks（WSNs）
received signal strength
reflection
path loss
