study on position computing in range-based localization system

In the existing range-based position computing algorithm,the localization accuracy is greatly influenced by the error of measured distance.In order to improve the localization accuracy,this paper presents an optimized indoor localization algorithm based on radical center.In the algorithm,firstly,calculating the radical center bases on the measured distance between every three anchor nodes and the target node.Then,percentage of the radical centers in the set which have large localization error are filtered out.Finally,computing the average of the remaining radical centers′ coordinates as the result bases on their weight.The result of simulation showed that compared with the existing range-based position computing algorithm,the presented position computing algorithm reduces the localization error and improves the localization accuracy effectively.