Data Fusion Trees for Detection: Does Architecture Matter?

Details Data Fusion Trees for Detection: Does Architecture Matter? Data Fusion Trees for Detection: Does Architecture Matter?

2008-03-16

arxiv.org/abs/0803.2337v1

Computer Science

Information Theory

Scientific paper

We consider the problem of decentralized detection in a network consisting of a large number of nodes arranged as a tree of bounded height, under the assumption of conditionally independent, identically distributed observations. We characterize the optimal error exponent under a Neyman-Pearson formulation. We show that the Type II error probability decays exponentially fast with the number of nodes, and the optimal error exponent is often the same as that corresponding to a parallel configuration. We provide sufficient, as well as necessary, conditions for this to happen. For those networks satisfying the sufficient conditions, we propose a simple strategy that nearly achieves the optimal error exponent, and in which all non-leaf nodes need only send 1-bit messages.

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