摘要
定位技术是无线传感器网络的关键技术之一;传统的DV-Hop算法只考虑了离它最近的平均每跳距离估计值,而每个待测节点到锚节点的距离不同,应该使用不同误差校正值参与运算;为了适应无线传感器网络的应用需求,提出了一种改进方案:引入总距离误差校正值与平均每跳误差校正值;使用MIN-MAX与加权最小二乘法的结合方法替换三边测量法;实验结果表明,改进算法降低了平均定位误差,提高了平均定位覆盖率,并且减少了计算开销。
The node localization technology is one of the critical technologies in wireless sensor network. The DV--Hop algorithm only considered the recent average hop distance estimates, but the distance between unknown nodes and anchor nodes is different. It should be used different error corrections in operation. In order to meet application requirements, an improved scheme is proposed. First, total distance error correction and the average per--hop error correction are obtained. Second, the combination of MIN MAX method and weighted least squares method take place of trilateration. The experiment results show, the average positioning error is reduced, the average location cover- age rate is improved, and the computational expense is reduced.
出处
《计算机测量与控制》
北大核心
2013年第7期2020-2022,共3页
Computer Measurement &Control
