基于接收信号强度的雷场节点定位方法

Minefields Node Localization Based on Received Signal Strength Indicator

为了减少封锁雷的硬件设备及降低功耗,提出了一种基于接收信号强度测距的雷场节点定位方法。该方法只需通过封锁雷本身的无线通信模块,不增加任何外界设备。首先根据接收信号强度RSSI测得雷场节点间的距离,通过数学运算建立虚拟锚点,然后借助已建立的锚点和三边测量法来确定锚点附近未知节点的坐标,直到雷场所有未知节点都计算完毕,最终完成雷场节点间的相对定位。实验结果表明当信道损耗指数为2.5时测距误差最小,雷场节点定位误差在4m以内,满足雷场封锁要求。

In order to reduce hardware of blockade mine and the power expending, this paper proposed a method for locating minefield nodes which based a on received signal strength indicator. The method only needed wireless communication module of blockade mine without any external equipments. Firstly, a virtual anchor was created and the distance between the nodes of minefields were measured with RSSI. And then the coordinates of the un- known node near the established anchor were determined by trilateratiorL Finally, the relative localization be- tween the minefield nodes were completed after all unknown nodes of minefield were calculated. The experimental result showed that the minefileds ranging error reached to the minimum level, and the minefields node positioning error was less than 4 meters,while the channel loss exponent was 2. 5. The localization satisfied the requirements of minefields blocking.