Decentralized sequential change detection using physical layer fusion

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dc.creatorZacharias, Leena
dc.creatorSundaresan, Rajesh
dc.date2007-07-22
dc.date2008-08-04
dc.date.accessioned2026-07-07T12:22:12Z
dc.date.available2026-07-07T12:22:12Z
dc.descriptionThe problem of decentralized sequential detection with conditionally independent observations is studied. The sensors form a star topology with a central node called fusion center as the hub. The sensors make noisy observations of a parameter that changes from an initial state to a final state at a random time where the random change time has a geometric distribution. The sensors amplify and forward the observations over a wireless Gaussian multiple access channel and operate under either a power constraint or an energy constraint. The optimal transmission strategy at each stage is shown to be the one that maximizes a certain Ali-Silvey distance between the distributions for the hypotheses before and after the change. Simulations demonstrate that the proposed analog technique has lower detection delays when compared with existing schemes. Simulations further demonstrate that the energy-constrained formulation enables better use of the total available energy than the power-constrained formulation in the change detection problem.
dc.description10 pages, two-column, 10 figures, revised based on feedback from reviewers, accepted for publication in IEEE Trans. on Wireless Communications
dc.identifierhttps://arxiv.org/abs/0707.3248
dc.identifierhttp://arxiv.org/abs/0707.3248
dc.identifierIEEE Trans. Wireless Commun., vol. 7, no. 12, pp. 4999-5008, Dec. 2008
dc.identifierdoi:10.1109/T-WC.2008.070808
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/213570
dc.subjectInformation Theory
dc.titleDecentralized sequential change detection using physical layer fusion
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