基于无线传感器网络的室内定位技术的研究

Study of indoor localization technique based on WSN

对WSN中基于测距技术的定位方法进行了研究,针对室内环境易对信号造成干扰且硬件存在差异的情况,采用为每个参考节点设置其测距模型的方案。对利用线性定位和极大似然估计两种定位算法分别进行了分析,通过实验测试定位系统中测距模型的测距误差以及两种定位算法的定位误差,依据实验结果提出了综合运用两种定位算法的策略。

This thesis aims to study the localization methods which are based on distance estimation technique.For the radio signal is sensitive and the hardwares of nodes are different from one another,this paper proposes a scheme of finding the distance estimation model for every node.The position of the unknown node can be estimated by linear localization or maximum likelihood estimation algorithms.The authors conducted experiments to analyze errors of the distance-estimation model and compare the errors of the two different algorithms.And put forward the strategy of the integrated use of two localization algorithms.