Protocolo de retransmissão incremental híbrido em sistemas cooperativos cognitivos de dois saltos com compartilhamento espectral

Abstract

In this paper, the performance of dual-hop cooperative cognitive systems with spectrum sharing is investigated assuming an incremental hybrid protocol at the relay node. Employing a maximal-ratio combining technique at the destination and considering Rayleigh fading, an exact closed-form expression for the end-to-end outage probability is derived and validated through Monte Carlo simulation. Numerical results are shown with the aim to evaluate the effects of the loss path coefficient, distance between nodes, and interference threshold of the primary network, in the system outage performance.