Cooperative relaying in spectrum-sharing systems with beamforming and interference constraints

Ali Afana, Vahid Asghari, Ali Ghrayeb, Sofiéne Affes

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

21 Citations (Scopus)

Abstract

In this paper, we use a distributed Zero Forcing Beamforming (ZFB) 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 decode-and-forward (DF) relays are employed to help a pair of secondary users in the presence of a licensed (primary) user. In this context, we derive expressions for the probability density functions (PDFs) of the received signal-to-noise ratio (SNR) at the relays as well as at the secondary destination. We also derive closed form expressions for the outage and bit error rate (BER) probabilities over independent and identically distributed (i.i.d.) Rayleigh fading channels. Numerical results demonstrate the efficacy of beamforming in improving the outage and BER performance.

Original languageEnglish
Title of host publication2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012
Pages429-433
Number of pages5
DOIs
Publication statusPublished - 2012
Event2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012 - Cesme, Turkey
Duration: 17 Jun 201220 Jun 2012

Other

Other2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012
CountryTurkey
CityCesme
Period17/6/1220/6/12

    Fingerprint

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

Cite this

Afana, A., Asghari, V., Ghrayeb, A., & Affes, S. (2012). Cooperative relaying in spectrum-sharing systems with beamforming and interference constraints. In 2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012 (pp. 429-433). [6292943] https://doi.org/10.1109/SPAWC.2012.6292943