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Sociedade Brasileira de Telecomunicações

Sensoriamento Espectral Cooperativo via Teorema dos Círculos de Gerschgorin sob Ruído Impulsivo

The GRCR (Gerschgorin radii and centers ratio) detector was recently proposed for application in spectrum sensing for cognitive radio systems. Its main attributes are the low complexity and the robustness against nonuniform and dynamical thermal noise and received signal power. This article evaluates the performance of the GRCR under the influence of impulsive noise and proposes a technique to mitigate this noise by nulling the corrupted samples. Simulation results show that the GRCR alone is not robust against impulsive noise, and that the proposed mitigation technique can make it practically insensitive to such a impairment.

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