Cluster-Based Spectrum Sensing for Cognitive Radios With Imperfect Channel to Cluster-Head

Provided by: Institute of Electrical & Electronic Engineers
Topic: Mobility
Format: PDF
Spectrum sensing is considered as the first and main step for cognitive radio systems to achieve an efficient use of spectrum. Cooperation and clustering among cognitive radio users are two techniques that can be employed with spectrum sensing in order to improve the sensing performance by reducing miss-detection and false alarm. In this paper, within the framework of a clustering-based cooperative spectrum sensing scheme, the authors study the effect of errors in transmitting the local decisions from the secondary users to the cluster heads (or the fusion center), while considering non-identical channel conditions between the secondary users.

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