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

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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.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Uncontrolled Keywords: AND; OR; Radix-2 multistage decision fusion; Correct decision probability; Cooperative spectrum sensing; Computational complexity
Subjects: Others > Engineering technology
Divisions: Department of Electrical Engineering
Depositing User: Library Staff
Date Deposited: 23 Feb 2016 11:19
Last Modified: 23 Feb 2016 11:19
URI: http://raiith.iith.ac.in/id/eprint/2204
Publisher URL: http://dx.doi.org/10.1016/j.dsp.2015.04.007
OA policy: http://www.sherpa.ac.uk/romeo/issn/1051-2004/
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