Cooperative bi-directional DF cognitive radio networks with limited feedback and beamforming

Ali Afana, Telex M N Ngatched, Octavia A. Dobre, Ali Ghrayeb

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

Abstract

In this paper, we consider cooperative beamforming for bi-directional decode and forward (DF) cognitive radio networks comprising two secondary transceivers and multiple secondary relays in the presence of a pair of primary users (PUs). The aim of this work is to improve the secondary system performance with limited feedback from the PUs while using a mean value-based power allocation strategy. We consider the presence of mutual interference between the primary and secondary systems, and employ beamforming to suppress the interference inflicted on the primary system. However, the interference caused to the secondary system is not mitigated. To examine the impact of this interference on the performance of the secondary system, we derive closed-form expressions for the outage probability and bit error rate (BER) over independent and identically distributed Rayleigh fading channels. Numerical and simulation results demonstrate the effect of the limited feedback on the secondary system performance.

Original languageEnglish
Title of host publication2015 IEEE International Conference on Communication Workshop, ICCW 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages979-984
Number of pages6
ISBN (Electronic)9781467363051
DOIs
Publication statusPublished - 8 Sep 2015
EventIEEE International Conference on Communication Workshop, ICCW 2015 - London, United Kingdom
Duration: 8 Jun 201512 Jun 2015

Other

OtherIEEE International Conference on Communication Workshop, ICCW 2015
CountryUnited Kingdom
CityLondon
Period8/6/1512/6/15

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ASJC Scopus subject areas

  • Computer Networks and Communications

Cite this

Afana, A., Ngatched, T. M. N., Dobre, O. A., & Ghrayeb, A. (2015). Cooperative bi-directional DF cognitive radio networks with limited feedback and beamforming. In 2015 IEEE International Conference on Communication Workshop, ICCW 2015 (pp. 979-984). [7247303] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICCW.2015.7247303