Spectrum Sensing with Improved Energy Detector under Uncertain Noise Variance

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  • Spectrum sensing (detection of spectrum holes) in cognitive radios (CRs) has been a promising technique to alleviate the problem of radio frequency (RF) spectrum scarcity. Among several available techniques to detect the availability of spectrum holes, the energy detector (ED) has been one of the most popular methods due to its ease of implementation and non-coherent nature. However, the energy detector is suitable only when the noise variance is known with absolute certainty, and its performance starts degrading with an increase in noise variance uncertainty. (As cited in abstract.)

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    Attribution-NonCommercial 4.0 International