摘要
在提高无线传感器网络节点定位精度的研究中,无线传感器网络能够实时监测、感知和采集各种环境或监测对象的信息,而节点自身定位是其重要的研究问题之一。为了减小DV-Hop定位算法在实际环境中的定位误差,提出了基于Steffensen加速迭代法的适用于无线传感器网络的迭代模型,将节点定位问题转化为求最优解问题。上述算法包括两个阶段:第一阶段,利用DV-Hop算法进行初步定位;第二阶段,建立Steffensen迭代模型,将第一阶段的定位结果作为初值,求得定位结果的最优解。仿真结果表明,改进算法在节点定位精度上有显著提高。
Wireless sensor network is a new technology for collecting and processing information, which can moni tor in real time, sense and collect information of various environmental or objects. The problem of node localization is one of the important research problems of wireless sensor networks. In order to reduce the positioning error of DV Hop localization algorithm in the actual environment, an iterative model was proposed based on Steffensen acceler ated iteration method which is suitable for the iteration model of wireless sensor networks. Through the establishment of the iterative model, node localization problem was converted to the problem of seeking optimal solution. The algo rithm includes two phases ： in the first stage, DV Hop algorithm is used for preliminary positioning; in the second stage, Steffensen iterative model is established. The positioning results of the first phase is used as initial value, and then the optimal solution in the positioning result is obtained. The simulation results show that the proposed algorithm has significantly improved node location accuracy.
出处
《计算机仿真》
CSCD
北大核心
2014年第4期303-306,334,共5页
Computer Simulation
