Resumen

LOPEZ, Raikel Bordón  y  MONTEJO SANCHEZ, Samuel. Cognitive Radio and Its Impact on the Efficient Use of Radio Spectrum. EAC [online]. 2015, vol.36, n.1, pp.42-55. ISSN 1815-5928.

Cognitive radio emerges as a new technology for wireless communication with the potential to solve the actual spectrum scarcity issue resulting from the inefficiency in the spectrum usage. Dynamic spectrum access techniques are a key element in the implementation of cognitive radio technology. In this paper we analyze the four main features that are part of the cognitive cycle to ensure dynamic spectrum access: (1) identification of opportunities for spectrum access, (2) selection of frequency bands for transmission; (3) coordination between users to access the spectrum, (4) spectral mobility. In addition, we provide a summary of the most popular testbed used in cognitive radio research and discuss the recent efforts made by various institutions in order to establish regulations for opportunistic spectrum usage.

Palabras clave : dynamic spectrum access; spectrum sensing; cognitive radio.

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