Optimized Cooperative Spectrum-Sensing in Clustered Cognitive Radio Networks

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, the authors 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 observation to a Fusion Centre (FC) using D orthogonal channels. The FC combines the receptions from cooperating nodes linearly.