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In cognitive radio networks, each cognitive transmission process typically requires two phases: the spectrum sensing phase and data transmission phase. In this paper, we investigate cognitive transmissions with multiple relays by jointly considering the two phases over Rayleigh fading channels. We study a selective fusion spectrum sensing and best relay data transmission (SFSS-BRDT) scheme in multiple-relay...
Cognitive radio is a promising technology that enables unlicensed users to communicate with each other over a licensed band (through spectrum holes). Typically, each cognitive transmission process consists of two required phases, i.e., the spectrum sensing and the data transmission phases. To improve the overall system performance of cognitive transmissions, we propose a cognitive relay scheme where...
In cognitive radio networks, a cognitive source node typically requires two essential phases to complete a cognitive transmission process: the phase of spectrum sensing with a certain time duration to detect a spectrum hole (thus also referred to as spectrum hole detection phase) and the phase of data transmission through the detected spectrum hole. In this paper, we focus on the analysis of cognitive...
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