中文摘要：

针对经典DV—hop算法在估计跳数时所引起的定位误差，提出了基于覆盖比例的定位算法．根据两节点间的通信覆盖率引入跳数系数，降低了每跳距离产生的误差，精确未知节点距参考节点的位置．仿真结果表明，改进的算法能使节点的定位精确度提高，使误差比原始算法降低10％左右．

英文摘要：

In wireless sensor networks, the localization of nodes is vital and promising to a wide scope of applications. Based on characteristics of DV-hop, an improved algorithm for the typical range-free locali- zation was proposed. The main principle of the improved algorithm is to introduce hop coefficient to revi- sion hops, which could address the problem that DV-hop localization of wireless sensor networks produces error of hops stimulation. Then hop coefficient could bring down the error of per hop average distances and be sure precisely unknown nodes and reference node. Simulation demonstrates that the results of im- proved algorithm are more accurate, and the errors down to about 10%.