Fundamental Limits of Wideband Localization - Part II: Cooperative Networks
Author(s)Shen, Yuan; Wymeersch, Henk; Win, Moe Z.
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The availability of position information is of great importance in many commercial, governmental, and military applications. Localization is commonly accomplished through the use of radio communication between mobile devices (agents) and fixed infrastructure (anchors). However, precise determination of agent positions is a challenging task, especially in harsh environments due to radio blockage or limited anchor deployment. In these situations, cooperation among agents can significantly improve localization accuracy and reduce localization outage probabilities. A general framework of analyzing the fundamental limits of wideband localization has been developed in Part I of the paper. Here, we build on this framework and establish the fundamental limits of wideband cooperative location-aware networks. Our analysis is based on the waveforms received at the nodes, in conjunction with Fisher information inequality. We provide a geometrical interpretation of equivalent Fisher information (EFI) for cooperative networks. This approach allows us to succinctly derive fundamental performance limits and their scaling behaviors, and to treat anchors and agents in a unified way from the perspective of localization accuracy. Our results yield important insights into how and when cooperation is beneficial.
DepartmentMassachusetts Institute of Technology. Department of Aeronautics and Astronautics; Massachusetts Institute of Technology. Laboratory for Information and Decision Systems
IEEE Transactions on Information Theory
Institute of Electrical and Electronics Engineers
Shen, Yuan, Henk Wymeersch, and Moe Z. Win. “Fundamental Limits of Wideband Localization Part II: Cooperative Networks.” IEEE Transactions on Information Theory 56.10 (2010) : 4981-5000. © 2010 IEEE
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INSPEC Accession Number: 11523425