煤矿井下超宽无线传感器网络定位技术的研究

超宽带技术作为一种新型短距离无线通信方式，其所采用的纳秒级窄脉冲具有许多传统正弦载波无法比拟的优势。基于超宽带技术本身具有的特性，将其与无线传感器网络技术相结合，可以广泛应用于煤矿井下环境，通过无线传感器网络节点定位实现安全监测。本文主要介绍了无线传感器网络节点定位基本原理和算法，提出适合煤矿井下环境的定位算法，并且在传统的测距定位方法基础上进行改进。仿真结果表明，改进的定位算法有效的提高了节点定位精度和定位性能。

Research on positioning technology of UVCB wireless sensor networks for underground coal mine

As a new type of short-range wireless communication, because of adoption of nanosecond pulse, ultra-wide band（LIWB） technology has more advantages compared with traditional methods adopting sinusoidal carrier. Combined with wireless sensor networks（WSN） technology, UWB is applied widely in the environment of underground coal mine and achieves safety monitoring according to WSN node location information. In this paper, the basic principle and algorithm of node positioning in wireless sensor networks are described, and an improved positioning algorithm suitable for coal mine environment is proposed based on the traditional ranging and positioning methods . The simulation results show that the improved positioning algorithm can improve positioning accuracy and performances of the nodes effectively.