Indoor node localization using geometric dilution of precision in ad-hoc sensor networks

In this paper, a new method for sensor node localization using geometric dilution of precision (GDOP) is described. The proposed methods are not constrained by fixed geometry. They can be used for robust node localization under both LOS and NLOS conditions in an ad-hoc sensor network. These methods are robust since they utilize measurements obtained from both LOS and NLOS conditions. Extensive simulations and real indoor deployments are used to evaluate the performance of the proposed node localization methods based on GDOP. The localization accuracy of these algorithms is reasonably better when compared to similar methods in literature.