On the capacity of cognitive radio under limited channel state information

Zouheir Rezki, Mohamed-Slim Alouini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

A spectrum-sharing communication system where the secondary user is aware of the instantaneous channel state information (CSI) of the secondary link, but knows only the statistics of the secondary transmitter-primary receiver link, is investigated. The optimum power profile and the ergodic capacity of the secondary link are derived for general fading channels (with continuous probability density function) under average and peak transmit-power constraints and with respect to two different interference constraints: an interference outage constraint and a signal-to-interference (SI) outage constraint. When applied to Rayleigh fading channels, our results show that the interference constraint is harmful at high-power regime, whereas at lowpower regime, it has a marginal impact and no-interference performance may be achieved. © 2010 IEEE.
Original languageEnglish (US)
Title of host publication2010 7th International Symposium on Wireless Communication Systems
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1066-1070
Number of pages5
ISBN (Print)9781424463169
DOIs
StatePublished - Sep 2010

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