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Improved decision for a resource-efficient fusion scheme in cooperative spectrum sensing

Guimarães, Dayan Adionel; Aquino, Guilherme Pedro; Cattaneo, Marco E. G. V.


Guilherme Pedro Aquino

Dayan Adionel Guimarães

Dayan Adionel Guimaraes


Paper presented at at 2015 International Workshop on Telecommunications (IWT), 14th to 17th of June, Santa Rita do Sapucai, Brazil. Abstract Recently, a novel decision fusion scheme for cooperative spectrum sensing was proposed, aiming at saving resources in the reporting channel transmissions. Secondary users are allowed to report their local decisions through the symbols of binary modulations, at the same time and with the same carrier frequencies. As a consequence, the transmitted symbols add incoherently at the fusion center, forming a larger set of symbols in which a subset is associated to the presence of the primary signal, and another subset is associated to the absence of such a signal. A Bayesian decision criterion with uniform prior was applied for discriminating these subsets. In this paper we propose a modified decision rule in which the target probabilities of detection and false alarm are taken into account to produce a large performance improvement over the original decision criterion. This improvement comes with practically no cost in complexity and does not demand the knowledge of any additional information when compared to the original rule.

Book Type Book Chapter
Start Date Jun 14, 2015
Publication Date Aug 25, 2015
Journal IWT 2015
Peer Reviewed Not Peer Reviewed
ISBN 9781467376228
Keywords Cooperative spectrum sensing
Publisher URL
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