Abstract: A novel location method based on phase differences of multiple arrival signals is proposed, in consideration of the special application scenarios. In this method, the target node sends FM modulation signal, and the anchor node obtains the arriving time differences of the received signal by measuring their phase differences, and then locates the target node by TDOA algorithm. On this basis, the location system and the position process are introduced. By means of software SystemView, system simulation is conducted. The distance measurement module and positioning accuracy of this system are analyzed in detail. The investigation validates the proposed location method, and demonstrates better suitableness for the special application scenario compared with other existing position systems.

Key words: Wireless Sensor Network（WSN）, position, phase detection, Time Difference Of Arrival（TDOA）, range

摘要： 针对特定应用场景，提出了一种基于测量多路到达信号相位差的定位方案。在方案中，目标节点发送宽带FM调制信号，锚节点通过多个天线接收目标节点发来的FM信号，估计出这些天线接收信号之间的相位差，通过TDOA定位算法获得目标节点的位置。给出了定位系统的设计方案以及定位流程。用SystemView工具对提出的方案进行了仿真，详细分析了测距模块和系统定位精度。综合比较其他定位系统，得出该系统更适合应用场景的结论。

关键词: 无线传感器网络, 定位, 鉴相, 到达时间差, 测距