Abstract: In view of the position errors in DV-Hop position algorithm of sensor network, this paper proposes a new position algorithm. With the introduction of RSSI position model, this algorithm can locate the estimated distance at the one hop ranging from the reference node to unknown node. Meanwhile, by taking advantages of coordinate offset model, this algorithm corrects the unknown node coordinate and offers a theoretical analysis of the new algorithm. Under the Windows platform, great improvement in position precision of the new algorithm has been validated by VC and OMNET simulate platform.

Key words: sensor network, DV-Hop position algorithm, Receive Signal Strength Indicator（RSSI）, coordinate offset model

摘要： 针对传感器网络DV-Hop定位算法在实际环境中定位误差较大等问题，提出一种新型定位算法。该算法结合DV-Hop和接收信号强度指示器（RSSI）测距模型的优点，在距参考节点一跳时对未知节点到该参考节点的估算距离进行定位，同时利用坐标偏移模型对未知节点坐标进行校正，并对新算法进行了理论分析。在Windows环境下，利用VC和OMNET仿真平台验证了新算法的定位精度有明显提高。

关键词: 传感器网络, DV-Hop定位算法, 接收信号强度指示器, 坐标偏移模型