PSD estimation in Cognitive Radio systems: a performance analysis

Leopoldo Angrisani, Domenico Capriglione, Luigi Ferrigno, Gianfranco Miele

Abstract

To meet the demanding expectations of the users, nowadays radio systems have to use the spectrum resource more intensely than in the past. Several studies have demonstrated that portions of radio spectrum are not in use for significant periods of time. Cognitive radios systems have been conceived to overcome this limit, enabling a flexible spectrum allocation, and making a more intensive and efficient spectrum use by the users sharing spectrum access. To meet this goal, cognitive radio terminals have to dynamically select the appropriate operating frequency based on the sensing of signals emitted by other transmitters. The paper focuses the attention on the performance analysis of a spectrum sensing based on the energy detection method. In particular, several power spectrum estimation methods are investigated in order to compare them mainly in terms of overall computational burden and algorithm performance.

Keywords

power spectrum, PSD estimation, spectrum sensing, Cognitive Radio

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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