一种基于双层栅格划分的无线传感器网络目标定位方法

目标定位和跟踪已成为无线传感器网络重要的应用领域。基于栅格部署的无线传感器网络以其特殊的拓扑结构,在目标定位方面具有独特优势。基于栅格部署的传感器网络,在单层栅格定位基础上考虑传感器节点本身的测量误差,提出了一种使用双层栅格定位目标的实用方法。仿真实验揭示了不同因素影响定位精度的一般规律,这对该方法的实际应用具有指导意义。实际系统的测试结果表明,双层栅格定位法不仅能够保证一定的定位精度,而且实时性高、实用性强。

Target Localization Based on Double-level Grid Division in Wireless Sensor Networks

Target localization and tracking have become an important fundamental technology in wireless sensor networks. Because of the special topology structure, grid-deployed wireless sensor networks have a great advantage at target localization. Based on the grid-deployed networks, this paper proposed a doublclevcl grid localization method, which is both theoretical and practical. Simulation results discover the regular pattern between different impacting factors and location error, which is meaningful to the real application of our method. I}he results of real system prove that the double-level grid localization method can not only keep location precision at some degree, but also has great capabilities of real-time and good practicality.