Optimized Cooperative Spectrum-sensing in Clustered Cognitive Radio Networks
نویسنده
چکیده
In cognitive radio networks, the pertinent task of spectrum sensing at the Secondary Users (SUs) can be achieved when the SUs cooperate in order to make a final decision about the presence of a communicating Primary User (PU). In this paper, we study a two-hop relaying system in which SUs are grouped into D clusters. The SUs transmit a simple power function (parameterized by p) of their observationto a Fusion Centre (FC) using D orthogonal channels. The FC combines the receptions from cooperating nodes linearly. The goal of this work is to maximize the probability of detection over the parameters D (number of clusters), p (power function exponent), and w(linear combining coefficients) for a given false alarm probability. Overall, this work quantifies the advantages of optimal cooperation in primary detection in cognitive radio networks.
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