摘要
定位技术是无线传感网络中重要的技术之一,特别在感知信息需要精确位置的时候,定位技术就尤为重要。DV-Hop定位算法在实际网络不需要测量工具的特性获得了广泛应用。然而,它的定位精度较低。为了提高DV-Hop算法的定位精度,文中提出了一种改进的DV-Hop算法,在计算未知节点到锚节点距离的时候引入了新的误差修正函数,使得所估计的节点间距离更加准确。实验表明,改进算法在同等情况下有效的提高了定位精度。
The position technologyvis an important issue in wireless sensor networks( WSNs),especially for applications requiring accurate position information. DV-Hop position algorithm can be simply implemented in real WSNs without any range measurement tools,but it has bad localization accuracy. To improve the accuracy of DV-Hop algorithm,an improved algorithm is proposed. The algorithm uses a new error correction function to estimate the distance between unknown nodes and anchor nodes,thus improving the accuracy of the estimated distance between unknown nodes and anchor nodes. Numerical tests show that the proposed algorithm can yield higher location precision.
出处
《南京邮电大学学报(自然科学版)》
北大核心
2016年第4期48-53,共6页
Journal of Nanjing University of Posts and Telecommunications:Natural Science Edition
基金
国家自然科学基金(61271234)资助项目
关键词
无线传感网
节点定位
DV-HOP
距离误差修正
wireless sensor networks(WSNs)
node localization
DV-Hop
correction in distance