基于载波相位差的室内定位系统研究

Research on Indoor Positioning System Based on Carrier Phase Difference

为提高室内定位精度,研究并实现了一种基于载波相位差的室内定位系统,利用双天线结构的传感器节点测量信号源载波相位差值,借助无线传感网络实现了分布式传感器节点的相位差值汇总。阐述了载波相位差定位的基本原理,通过基于泰勒级数展开的最小二乘迭代算法完成定位过程中双曲线方程的求解,得到目标位置,并对系统各节点进行了设计。仿真与实验的结果均证明了定位算法的有效性以及定位系统在非视距环境下的定位能力。

To improve the accuracy of indoor positioning,an indoor positioning system based on carrier phase difference is researched and implemented.The sensor node with dual antenna structure is used to measure the signal source carrier phase difference,and the phase difference of distributed sensor nodes is realized with the help of wireless sensor network.The basic principle of carrier phase difference positioning is explained.The hyperbolic equation in the positioning process is solved by the least squares iterative algorithm based on Taylor expansion to abtain the target position,and the nodes of the system are designed.The results of simulation and experiment both prove the effectiveness of the positioning algorithm and the positioning ability of the positioning system in a non-line-of-sight environment.