天线分集技术在WSNs定位中的应用  

Application of antenna diversity technology in WSNs localization

作　　者：唐芸芸[1] 闫斌[1] 王忠有[1] 

机构地区：[1]电子科技大学自动化工程学院,四川成都611731

出　　处：《传感器与微系统》2013年第11期146-148,152,共4页Transducer and Microsystem Technologies

摘　　要：针对基于接收信号强度指示(RSSI)的定位算法中根据RSSI测距误差较大的问题,提出了在锚节点上使用天线分集技术的方法。该方法在锚节点上安装2根天线,天线互成90°,采用空间分集。锚节点在接收未知节点广播信号时,选择2根天线中信号强的天线接收信号,并记录RSSI值。实验证明:在锚节点上引入天线分集技术,可以降低无线信号多径衰落的影响,提高RSSI值的稳定性,减小了测距误差,提高了定位精度。Aiming at the problem that RSSI-based range measurement has a large error in RSSI-based localization algorithm, a new approach using antenna diversity technology on anchor nodes is proposed. Two antennas are fixed to an anchor node in the approach, and the angle of the two antennas on an anchor node is 90°and spatial diversity is applied. When receiving broadcast signal from unknown node, anchor node will select the one which has stronger signal in the two antennas and record the RSSI value. Experiment shows that introducing antenna diversity into anchor nodes will reduce the influence of muhipath fading and enhance the stability of RSSI value, so reduces ranging error and improves positioning precision.

关 键 词：天线分集 无线传感器网络 定位 接收信号强度指示 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]