An Improved Location Algorithm Based on CC2431

In ranging technology-based positioning algorithm, after getting the distance between nodes using RSSI ranging, we can use trilateration method, triangulation method or maximum likelihood estimation algorithms to calculate the position of the blind node. In the real environment, the radio transmission path loss, antenna height, antenna angle of the obstacle, the electromagnetic wave interference and other factors have a significant impact to its received signal strength measurement and we can optimize the main parameter and exclude the maximum error by measuring and analyzing. And we have proposed the improved weighted centroid localization algorithm based on the CC2431 and the implementation of the algorithm change over the hardware. the improved algorithm proposed in this paper improved the positioning accuracy effectively, and achieved a well positioning results.