摘要
针对水环境的特殊性,提出了一种迭代定位算法。该算法结合了极大似然定位算法和三角余弦定理定位算法,将信标节点按照一定的规则放置在节点部署区域的边缘,根据三角形余弦定理估计可定位区域内的所有未知节点的位置,并将已获得位置信息的节点标记为信标节点。计算剩余未知节点的邻居节点中包含信标节点的数目,若含有3个及以上的信标节点,则执行极大似然定位算法,迭代定位直到所有的节点被定位。
Combined the maximum likelihood positioning algorithm with the triangle cosines theorem positio- ning algorithm,this paper proposes an iterative localization algorithm for the particularity of the water environ- ment. First,the beacon nodes are placed in the edge of the nodes distribution area according to a certain rule, then the nodes are marked as beacon nodes whose location information was estimated by the cosine theorem. At last, the number of neighbors of residual unknown nodes is counted. If there are 3 or more beacon nodes a- mong the neighbors ,the unknown node＇s position will be calculated by the maximum likelihood localization al- gorithm. By repeating this iterative process,all the unknown nodes will be located gradually.
出处
《南京邮电大学学报（自然科学版）》
北大核心
2013年第4期78-82,99,共6页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家自然科学基金(61171053,60973139)
江苏省高校自然科学研究(11KJA520001)
江苏高校科技创新计划(CXZZ12_0481)资助项目
关键词
无线传感器网络
迭代定位
极大似然法
余弦定理
wireless sensor networks
iterative localization
maximum likelihood
cosine theorem
