摘要
针对Dv-Hop算法中锚节点与待定位节点的估算距离引入的误差较大,从而影响使用最小二乘法定位的问题,提出了一种改进的算法。该算法主要原理是借助RSSI测距技术,并对锚节点与待定位节点间估算距离排序选出误差较小的一组数据,选用此组数据构建最小二乘法方程组中的被减方程,以提高定位精度。仿真结果表明,与传统的Dv-Hop算法相比,改进后的算法在不增加额外硬件和计算量的前提下提高了定位精度。
In conventional DvHop algorithm, large error took place in estimated distance between anchor nodes and node to be positioned, which affect the use of least square method. An improved algorithm is proposed according to the algorithm RSSI, the principle of which is selecting a group of data with the least error as the reduced equation in the least square equation set in order to improve the accuracy of positioning. The simulation results show that, the improved algorithm greatly improve the posi tioning accuracy without no additional hardware and computation.
出处
《计算机工程与设计》
CSCD
北大核心
2013年第2期401-404,共4页
Computer Engineering and Design
基金
科技部创新基金项目(11C26215113536)
重庆市科委科技攻关基金项目(CSTC2011AC2109
CSTC2011AC2179)
