关键词: 接收信号强度指示, 定位, 中位数

Abstract:

A modified mobile location algorithm based on received signal strength indication (RSSI) is presented. The geometric location of the anchor node is taken into account with the revised positioning algorithm. And then the common line of the three reference nodes is excluded to get the best three reference nodes. RSSI values gives that the same reference node collected takes the median. According to the median of the RSSI values, RSSI values are amended. Finally, the unknown node is located by using the weighted centric algorithm. The algorithm didn’t need additional hardware cost, but easy to implement. It improves the positioning accuracy and suits for the positioning of nodes on wireless sensor networks when their operation abilities and power supplies are restricted.

Key words: received signal strength indication, localization, median