【摘要】 节点自定位技术是无线传感器网络的关键技术之一,文章主要针对DV-Hop算法中定位精度的不足提出一种基于功率控制的改进算法。将RSSI和DV-Hop相结合,把传统DV-Hop算法中的跳数用虚拟距离代替,通过实际距离与虚拟距离的比例来修正平均每跳距离。为了减小定位误差和提高定位覆盖率,该文将锚节点分布在区域四周,并且将已定位的未知节点升级为锚节点。经仿真结果表明,与传统DV-Hop算法相比,改进后的算法可以有效提高定位精度。更多还原

【Abstract】 The technology of node self-location is one of the key technology in WSN.Because the positioning accuracy insufficiency of DV-Hop algorithm,an improved localization algorithm based on power control were proposed in this paper,which combined DV-Hop algorithm with RSSI,replaced the hop number in DV-Hop algorithm with the virtual distance,and revised the average one-Hop distance through the ratio of real distance and virtual distance.To improving the location accuracy and coverage rate,the anchor node were placed in the border of area.In addition,the unknown node is located and converted to anchor node.The simulation results show that the improved algorithm can improve the positioning accuracy effectively comparing with conventional DV-Hop algorithm.更多还原