Enhancing the performance of spectrum-sharing systems via collaborative distributed beamforming and AF relaying

Ali Afana, Vahid Asghari, Ali Ghrayeb, Sofiene Affes

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

7 Citations (Scopus)

Abstract

In this paper, we use a distributed beamforming method in cognitive radio relay networks in an effort to enhance the spectrum efficiency and improve the performance of the cognitive (secondary) system. In particular, we consider a spectrum sharing system where a set of potential relays are employed to help a pair of secondary users in the presence of a licensed (primary) user. A selection relaying scenario in an amplify and forward (AF) scheme is investigated. In this context, we obtain the exact expressions for the cumulative distribution function (CDF) and the moment generating function (MGF) of the equivalent end-to-end SNR at the secondary destination. Then, to analyze the performance, we derive closed-form expressions for the outage probability and bit error rate (BER) over independent and identically distributed (i.i.d.) Rayleigh fading channels. Numerical results demonstrate the efficacy of beamforming in improving the secondary system performance in addition to limiting the interference to the primary users.

Original languageEnglish
Title of host publication2012 IEEE Global Communications Conference, GLOBECOM 2012
Pages1314-1319
Number of pages6
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 IEEE Global Communications Conference, GLOBECOM 2012 - Anaheim, CA, United States
Duration: 3 Dec 20127 Dec 2012

Other

Other2012 IEEE Global Communications Conference, GLOBECOM 2012
CountryUnited States
CityAnaheim, CA
Period3/12/127/12/12

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Afana, A., Asghari, V., Ghrayeb, A., & Affes, S. (2012). Enhancing the performance of spectrum-sharing systems via collaborative distributed beamforming and AF relaying. In 2012 IEEE Global Communications Conference, GLOBECOM 2012 (pp. 1314-1319). [6503295] https://doi.org/10.1109/GLOCOM.2012.6503295