A novel multistage decision fusion for cognitive sensor networks using AND and OR rules

Gupta, K and Merchant, S N and Desai, U B (2015) A novel multistage decision fusion for cognitive sensor networks using AND and OR rules. Digital Signal Processing, 42. pp. 27-34. ISSN 1051-2004

Full text not available from this repository. (Request a copy)

Abstract

We propose a centralized radix-2 multistage decision fusion strategy comprising simple AND and OR rules for cooperative spectrum sensing in cognitive sensor networks. Earlier works on centralized decision fusion show the half-voting and majority rules to be optimum in many spectrum sensing scenarios in terms of minimizing the decision error (or equivalently maximizing the probability of correct decision). We consider a commonly occurring case in spectrum sensing in which the detection probability of a cognitive radio enabled sensor node is greater than its false-alarm probability. For this case, we consider five scenarios and demonstrate that the proposed method either performs better than half-voting and majority rules or exhibits a comparable performance. In this context, we also establish a criterion to make a choice between the AND and OR rules and compute the optimum number of nodes participating in cooperative spectrum sensing for these rules to maximize the correct decision probability.

[error in script]

IITH Creators: