Capacity Limits of Spectrum-Sharing in Hoyt (Nakagami-q) Fading Channels

2016 IEEE 84th Vehicular Technology Conference: VTC2016-Fall Puede consultarse el artículo completo en el portal IEEE Xplore Capacity Limits of Spectrum-Sharing in Hoyt (Nakagami-q) Fading Channels Juan M. Romero Jerez Dept. de Tecnología Electrónica Universidad de Málaga 29071 Málaga, Spain Email: rom[email protected]a.es F. Javier Lopez-Martinez Dept. Communications Engineering Universidad de Málaga 29071 Málaga, Spain Email: [email protected] Abstract: A channel capacity analysis is presented in this work for a spectrumsharing cognitive radio link in which the fading experienced by the signal is modeled with the Hoyt (Nakagami-q) distribution. Based on a novel formulation of the squared Hoyt distribution derived by the authors, simple expressions for the capacity of the secondary link in a number of scenarios of interest are derived, which are given in terms of easy-to-compute finite-range integrals of elementary functions. The effect of fading severity in the secondary transmitterprimary receiver (ST-PR) and secondary transmitter-secondary receiver (ST-SR) links, and the impact of different antenna gains on the system performance are analyzed. We show that in the presence of severe fading for the ST-PR link, the capacity of the STSR link is increased. ACKNOWLEDGMENT The work of Juan M. Romero-Jerez was supported in part by the Spanish Government-FEDER public Project No. TEC2013-42711-R and in part the by Universidad de Málaga, Campus de Excelencia Internacional Andaluca Tech. The work of F.J. Lopez-Martinez was funded by Junta de Andalucia (P11-TIC-7109), Spanish Government-FEDER (TEC2013-44442-P, COFUND2013-40259), the University of Malaga and the European Union under Marie-Curie COFUND U-mobility program (ref. 246550).