Abstract
This paper proposes an integrated spectrum sensing (SS) and energy harvesting (EH) scheme, where all of the incoming radio frequency (RF) power are used for EH. Then, SS is performed based on the harvested energy. This approach does not require a separate energy detector which needs power- hungry RF front ends. As a result, the energy consumption for spectrum sensing can be reduced significantly. Additionally, it can increase the harvested energy over the conventional separated SS-EH scheme which allows only a fraction of RF power to be used for EH. The probability of false alarm and missed detection are derived in Rayleigh fading channels and are compared with the conventional separated SS-EH scheme.
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