Information Coupling in Cooperative Localization

Cooperative network localization with high-accuracy and environment-independent reliability will enable a myriad of important applications. However, distributed implementations of cooperative algorithms currently do not account for the correlation of inferred nodes' positions. This letter investigates such correlation in cooperative localization in terms of Fisher information, leading to the concept of information coupling. To characterize its behavior, we focus on the simplest non-trivial case and derive the expressions for information coupling.