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In cognitive networks, cognitive radios utilize spectrum sensing technology to avoid interference to primary users. There are two important factors associated with spectrum sensing: detection probability and false alarm probability. The higher the detection probability, the better the primary users are protected. On the other hand, for cognitive radios the lower the false alarm probability, the more...
In this paper, we propose an Opportunity Spectrum Access (OSA) strategy based on multichannel sensing. CR users decide the number of the channels to be used according to their own business requirements. At the same time, the channels CR users can use are limited. In the scenario, here we considered, CR users only can sense part of the channels due to hardware constraints. For the node, more time to...
Cognitive radio (CR) is proposed as a promising solution to resolve the spectrum resource scarcity. The premise to implement CR is not to introduce harmful interference to the licensed users (LU). This constraint makes interference estimation becoming very important. In this paper, we perform a quantitative analysis of theaggregation interference at the LU's receiver. We develop two multi-cell models...
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