Characterization and exploitation of heterogeneous OFDM primary users in cognitive radio networks

Authors:
Anna Vizziello;Ian F. Akyildiz;Ramon Agustí;Lorenzo Favalli;Pietro Savazzi
Affiliations:
Dipartimento di Ingegneria Industriale e dell'Informazione, Università degli Studi di Pavia, Pavia, Italy 27100;Telecommunication Engineering School (ETSETB), Universitat Politècnica de Catalunya, Barcelona, Spain 08034 and Department of Information Technology, King Abdulaziz University, Jeddah, Saudi ...;Department of Signal Theory and Communications (TSC), Universitat Politècnica de Catalunya, Barcelona, Spain 08034;Dipartimento di Ingegneria Industriale e dell'Informazione, Università degli Studi di Pavia, Pavia, Italy 27100;Dipartimento di Ingegneria Industriale e dell'Informazione, Università degli Studi di Pavia, Pavia, Italy 27100
Venue:
Wireless Networks
Year:
2013

Citing 6
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Abstract

The fundamental features of cognitive radio (CR) systems are their ability to adapt to the wireless environment where they operate and their opportunistic occupation of the licensed spectrum bands assigned to the primary network. CR users in CR systems should not cause any interference to primary users (PUs) of the primary network. For this purpose, CR users need to accurately estimate the features and activities of the primary users. In this paper, a novel characterization of heterogeneous PUs and a novel reconfigurability solution in CR networks are introduced. The characterization of PUs consists of a detector and classifier that distinguishes between heterogenous PUs. The PU characteristics stored in radio environmental maps are utilized by an interference/throughput adapter for the optimization of CR parameters. The performance of the proposed solutions is evaluated by showing false alarm and missed detection probabilities of the detector/classifier in a multipath fading channel with additive white Gaussian noise. Moreover, the impact of the PU characteristics on the CR throughput is analyzed.