提高DV-Hop算法定位精度研究

从DV-Hop算法模型出发，为突破算法应用限制条件，采用总体最小二乘法原理，研究了锚节点位置信息存在误差时，无线传感器网络中传感器的定位问题，得到了更一般的结果。仿真结果表明，在100×100的仿真场景内部署100个传感器节点，通信半径为30 m、高斯噪声方差为1，当锚节点数量占总节点数量之比小于8%时，可显著改善WSN的定位精度，平均定位精度比原方法提高了20%~30%；当锚节点数量占总节点数量之比大于8%时，两种方法定位精度趋于相等。

Study of improving location accuracy of DV-Hop algorithm

The application restrictions of DV-Hop are broken through starting from its model.According to the principle of total least squarest,he location problem of sensors is studied in wireless sensor network when the anchor node location infor-mation exists errorsa,nd more general results are obtained.In the simulation scene with size 100×100,100 sensor nodesc,om-munication radius 30m,Gaussian noise variance 1 and the ratio of anchor node less than 8%t,he simulation demonstrates that this approach can improve the location accuracy of WSN significantly.Its average location accuracy increases by 20%~ 30% than the original method.The two methods tend to have the same accuracy when the ratio of anchor nodes is greater than 8%.