An Energy Efficient Methodology for Cognitive Radio Networks

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Provided by: International Journal of Innovative Science Engineering and Technology (IJISET)
Topic: Networking
Format: PDF
As a promising solution to the spectrum scarcity problem, the Cognitive Radio (CR) system has received much attention lately, where the Secondary User (SU) can access the primary bands without degrading the Quality of Service (QoS) of the Primary User (PU). The authors propose continuous power allocation strategies for Secondary Users (SUs) based on sensing the Primary User (PU) channels in a multiband Cognitive Radio (CR) network. Unlike the conventional sensing-based spectrum sharing, where there are two transmit power levels corresponding to whether the PU is sensed present or not, in the proposed strategy, the power levels are continuous functions of the sensing statistics, and optimized with respect to the achievable rate of the SU.
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