Sensoriamento Espectral Cooperativo Baseado em Autovalores para Sinais de Banda Larga

A new spectrum sensing approach for the spectrum sensing of wideband signals in cognitive radio (CR) systems is proposed. Eigenvalue detection techniques are combined with two data fusion schemes, where i) the samples collected by each CR are combined at the fusion center (FC) and ii) the eigenvalues of received covariance matrices in each CR are combined at the FC. Simulation results unveil that the eigenvalue combining strategy suggested in this paper can overcome the performance attained with samples combining, also reducing the data traffic in the reporting control channel.