非视距条件下的测距信息融合定位方法研究  

Research on positioning method by ranging information fusion under NLOS condition

作　　者：李娅菲[1] 朱烜璋[2] 

机构地区：[1]湖南科技学院电子与信息工程学院,永州425100 [2]湖南科技学院现代教育技术中心,永州425100

出　　处：《电子测量与仪器学报》2015年第5期775-780,共6页Journal of Electronic Measurement and Instrumentation

摘　　要：为了改善在非视距传播条件下的定位精度,研究和提出了一种测距信息融合定位方法。在NLOS指数分布模型下,利用锚节点传感器测量来自未知节点的接收信号强度、电波到达时间和电波达到角信息,首先将3种测距信息测量值构成一个测距信息集数据库,建立有效的多级联合判决机制,然后利用各自测量量获得相关的距离信息,并进一步利用获得的测距信息进行两两联合求解,剔除异常信息,最后进行加权融合处理得到未知节点坐标。计算机仿真结果表明,本文所提定位方法能有效地抑制NLOS误差,较传统定位方法提高了定位精度。In order to improve the positioning accuracy under the NLOS （. Nen-Line-Of-Signt propagauon）, a joint range-based positioning method is proposed. The method uses RSSI （Received Signal Strength Indication）, TOA （Time Of Arrival） and AOA （Angle Of Arrival） information measured by the anchor node to construct a ranging information data base firstly. Then an effective muhi-level decision mechanism is built, and its measurement infor- mation is used to obtain the relevant distances. After joint problem is solved by the ranging information, the abnor- mal information is eliminated. Finally the position of the unknown node is gotten by weighted fusion. The simula- tion results show that the proposed positioning method can restrain NLOS error effectively, and has better positio- ning accuracy than that of the traditional methods.

关 键 词：非视距传播 位置 接收信号强度 电波到达时间 电波达到角 

分 类 号：TN911.7[电子电信—通信与信息系统]