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A Spectrum Sensing Algorithm for Constant Modulus Primary Users Signals

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Original languageEnglish
Pages (from-to)400-403
Number of pages4
JournalIEEE Communications Letters
Issue number2
Publication statusPublished - 2015
Publication typeA1 Journal article-refereed


In this letter, a spectrum sensing technique is proposed for constant modulus primary users signals. A new metric, namely the normalized variance, is introduced as a function of the second and fourth order moment of the received signal. Then, it is used as the testing variable for detecting the primary user signal. Theoretical analysis and simulations in the presence of noise uncertainty evaluate the performance of the proposed technique, in comparison with the conventional energy detection. The results evidence the efficiency of our method for fast and reliable primary users’ detection in cognitive radio systems.


  • Spectrum sensing, cognitive communications, constant modulus signals, energy detector, noise uncertainty

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