Cognitive legacy networks via cooperative diversity

Authors:
Ioannis Krikidis;Zhanwei Sun;J. Nicholas Laneman;John Thompson
Affiliations:
Institute for Digital Communications, University of Edinburgh, UK;Department of Electrical Engineering, University of Notre Dame, IN;Department of Electrical Engineering, University of Notre Dame, IN;Institute for Digital Communications, University of Edinburgh, UK
Venue:
IEEE Communications Letters
Year:
2009

Citing 4
Cited 4

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Abstract

In this letter, we deal with the cognitive radio (CR) concept for legacy primary links optimized for noninterference surroundings. In this type of network, primary destinations are not able to deal with possible interference and a missed cognitive detection significantly reduces the system performance. The enhancement of the primary network with cooperative diversity in addition to the well-known diversity gain for the primary link improves the sensing ability of the system and protects the primary user from possible interference. The proposed solution provides CR benefits without complicated network modifications and seems to be an attractive solution for future legacy networks.