Channel Capacity Limits of Cognitive Radio in Asymmetric Fading Environments (2008)
Type of ContentConference Contributions - Published
PublisherUniversity of Canterbury. Electrical and Computer Engineering.
AuthorsSuraweera, H.A., Gao, J., Smith, P. J., Shafi, M., Faulkner, M.show all
Cognitive radio technology is an innovative radio design concept which aims to increase spectrum utilization by exploiting unused spectrum in dynamically changing environments. By extending previous results, we investigate the capacity gains achievable with this dynamic spectrum approach in asymmetric fading channels. More specifically, we allow the secondary-toprimary and secondary-to-secondary user channels to undergo Rayleigh or Rician fading, with arbitrary link power. In order to compute the capacity, we derive the distributions of ratios of Rayleigh and Rician variables. Compared to the symmetric fading scenario, our results indicate several interesting features of the capacity behaviour under both average and peak received power constraints. Finally, the impact of multiple primary users on the capacity under asymmetric fading has also been studied.
CitationSuraweera, H.A., Gao, J., Smith, P. J., Shafi, M., Faulkner, M. (2008) Channel Capacity Limits of Cognitive Radio in Asymmetric Fading Environments. Beijing, China: IEEE International Conference on Communications, 19-23 May 2008. 4048-4053.
This citation is automatically generated and may be unreliable. Use as a guide only.