Energy-Efficient Spectrum Sensing for Cognitive Radio Networks (2013)
Abstract / truncated to 115 words
Dynamic spectrum access employing cognitive radios has been proposed, in order to opportunistically use underutilized spectrum portions of a heavily licensed electromagnetic spectrum. Cognitive radios opportunistically share the spectrum, while avoiding any harmful interference to the primary licensed users. One major category of cognitive radios consists of is interweave cognitive radios. In this category, cognitive radios employ spectrum sensing to detect the empty bands of the radio spectrum, also known as spectrum holes. Upon detection of such a spectrum hole, cognitive radios dynamically share this empty band. However, as soon as the primary user appears in the corresponding band, cognitive radios have to vacate the band and look for a new spectrum hole. This way, ... toggle 8 keywordsdistributed spectrum sensing – cognitive radio – energy-efficiency – distributed detection – censoring – sequential sensing – sleeping – optimal fusion rules.
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