摘要
在工业环境应用无线传感器网络,将面临设备及器材引起的大量散射电磁波带来的无线信道随机衰落。该文对工业环境无线信号进行了分析,针对传感器节点体积及成本受限的情况,在极化分集基础上提出一种天线姿态寻优方案,对极化分集与天线姿态寻优带来的分集增益进行了仿真和对比,并设计了适用于无线传感器网络的天线优化方案。通过工业环境实际测量,验证了无线传感器网络天线分集方案的有效性。
The industrial wireless sensor networks may suffer serious random fading of wireless channel in industrial environment which is induced by the metallic equipments and apparatus. By analyzing the radio signals in industrial environment, an antenna attitude optimized system is presented based on the polarization diversity technology considering the limitation of size and cost for wireless sensor networks. The performance comparison between selection-diversity system and antenna attitude optimized system is carried out, and an antenna optimization scheme is put forward suitable for wireless sensor networks, with high effectiveness verified by measurements in actual industrial environment.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第12期2970-2975,共6页
Journal of Electronics & Information Technology
基金
国家自然科学基金(50674010)
国家863计划项目(2007AA04Z169)资助课题
关键词
无线传感器网络
无线信道
工业环境
分集
Wireless sensor networks
Wireless channel
Industrial environment
Diversity
