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Títol: Multi-frequency GLRT spectrum sensing for wideband cognitive radio
Autor: Font Segura, Josep
Vázquez Grau, Gregorio
Riba Sagarra, Jaume
Altres autors/autores: Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions
Editorial: IEEE Press. Institute of Electrical and Electronics Engineers
Matèries: Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Processament del senyal
Cognitive radio
Ràdio cognitiva
Tipus de document: Conference report
Descripció: The problem of spectrum sensing in multi-frequency cognitive radio systems is addressed. We show that as the sensed bandwidth increases, the primary user detection is governed by a low signal-to-noise ratio (low-SNR) regime. By means of low-SNR approximations, we show that the optimal generalized likelihood ratio test (GLRT) only depends on the second order statistics of the observations and on a shaping kernel that highlights the relevant parameters required for detection. Furthermore, the ML estimates of the unknown model parameters are derived for multi-frequency systems, which allow closed-form expressions for the GLRT statistic. The detection performance and the kernel interpretation are supported with simulation results.
Peer Reviewed
Postprint (published version)
Altres identificadors i accés: Font-Segura, J.; Vazquez, G.; Riba, J. Multi-frequency GLRT spectrum sensing for wideband cognitive radio. A: IEEE International Conference on Communication (ICC). "2011 IEEE International Conference on Communications". Kyoto: IEEE Press. Institute of Electrical and Electronics Engineers, 2011, p. 1-5.
http://hdl.handle.net/2117/15099
10.1109/icc.2011.5963314
Disponible al dipòsit:E-prints UPC
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