TOA Based Localization Error Geometry Distribution in Sensor Networks
Yao Peiyang · Electronics Optics & Control · 2010
The positioning principle of Time of Arrival(TOA) algorithm was analyzed,and Geometrical Dilution of Precision(GDOP) was used to describe the relationship between locating error and anchor nodes' geometry distribution.Then,the GDOP calculation method based on ranging is presented.Monte Carlo method was adopted for simulation,and the time of simulation is set as 100 with anchor nodes' number as 3 and 5.On the assumption that distance measurement error of anchor nodes is equal,the normalizing GDOP value and average GDOP value of unknown nodes' locating error based on interior node and exterior node of anchor nodes swarm were calculated out.It was verified that the node locating accuracy is related with anchor nodes' topology.The conclusion is that the nodes inside the anchor nodes have higher locating precision.