An Investigation on the Effects of New Reference Node Addition on the location Estimation Improvement in Positioning Systems

In a location estimation system, the deployment of reference nodes significantly affects theaccuracy of estimating the location of the desired points. In this paper, it is assumed that thelocation system is equipped with a number of reference nodes in a specified arrangement, andthe goal is to add a number of new reference nodes to improve the location estimation accuracyof a desired emitting node. In this network, the location of an emitting node is estimated bymeasuring the distances to the reference nodes. An algorithm is proposed to find the optimalplace of the new added reference nodes using the frame theory. The basis of this algorithm is toarrange the new reference nodes without changing the location of the present reference nodes inthe system in such a way that the determinant of the Fisher information matrix is maximized.The simulation results verify the efficiency of the proposed algorithm in the optimal deploymentof new reference nodes.