Cooperative two-way selective relaying in spectrum-sharing systems with distributed beamforming

Ali Afana, Ali Ghrayeb, Vahid Asghari, Sofiene Affes

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

3 Citations (Scopus)

Abstract

We consider in this paper distributed beamforming for two-way cognitive radio networks in an effort to improve the spectrum efficiency and enhance the performance of the cognitive (secondary) system. In particular, we consider a spectrum sharing system where a set of decode-and-forward (DF) relays are employed to help a pair of secondary transceivers in the presence of multiple licensed (primary) users. Among the available relays, only those that receive the signals reliably participate in the beamforming process, where the optimal beamformer weights are obtained via a linear optimization method. We derive closed-form expression for the probability distribution function (PDF) of the total end-to-end signal-to-noise ratio (SNR) at the secondary transceiver. We also derive closed-form expressions for the outage and error probabilities over independent and identically distributed (i.i.d.) Rayleigh fading channels. Numerical results show the effect of beamforming in enhancing the secondary system performance in addition to mitigating the interference to the primary users.

Original languageEnglish
Title of host publication2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
Pages2976-2981
Number of pages6
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event2013 IEEE Wireless Communications and Networking Conference, WCNC 2013 - Shanghai, China
Duration: 7 Apr 201310 Apr 2013

Other

Other2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
CountryChina
CityShanghai
Period7/4/1310/4/13

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Afana, A., Ghrayeb, A., Asghari, V., & Affes, S. (2013). Cooperative two-way selective relaying in spectrum-sharing systems with distributed beamforming. In 2013 IEEE Wireless Communications and Networking Conference, WCNC 2013 (pp. 2976-2981). [6555035] https://doi.org/10.1109/WCNC.2013.6555035