Multiuser Cognitive Relay Networks in the Presence of Direct Links

Xianfu Lei, Rose Qingyang Hu, Trung Q. Duong, Lisheng Fan, Maged Elkashlan

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

2 Citations (Scopus)

Abstract

In this paper, we investigate a multiuser cognitive relay network with direct source-destination links and multiple primary destinations. In this network, multiple secondary users compete to communicate with a secondary destination assisted by an amplify-and-forward (AF) relay. We take into account the availability of direct links from the secondary users to the primary and secondary destinations. For the considered system, we select one best secondary user to maximize the received signal-to-noise ratio (SNR) at the secondary destination. We first derive an accurate lower bound of the outage probability, and then provide an asymptotic expression of outage probability in high SNR region. From the lower bound and the asymptotic expressions, we obtain several insights into the system design. Numerical and simulation results are finally demonstrated to verify the proposed studies.
Original languageEnglish
Title of host publicationCommunications (ICC), 2014 IEEE International Conference on
EditorsAbbas Jamalipour, Der-Jiunn Deng
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages4342-4347
Number of pages6
ISBN (Print)9781479920037
DOIs
Publication statusPublished - 2014

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    Lei, X., Hu, R. Q., Duong, T. Q., Fan, L., & Elkashlan, M. (2014). Multiuser Cognitive Relay Networks in the Presence of Direct Links. In A. Jamalipour, & D-J. Deng (Eds.), Communications (ICC), 2014 IEEE International Conference on (pp. 4342-4347). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ICC.2014.6884003