• DocumentCode
    1400611
  • Title

    Multihop Wireless Relaying Systems in the Presence of Cochannel Interferences: Performance Analysis and Design Optimization

  • Author

    Ikki, Salama Said ; Aïssa, Sonia

  • Author_Institution
    Nat. Inst. of Sci. Res.-Energy, Mater., & Telecommun. (INRS-EMT), Univ. of Quebec, Montreal, QC, Canada
  • Volume
    61
  • Issue
    2
  • fYear
    2012
  • Firstpage
    566
  • Lastpage
    573
  • Abstract
    A study of the effect of cochannel interference on the performance of multihop wireless networks with amplify-and-forward (AF) relaying is presented. Considering that transmissions are performed over Rayleigh fading channels, first, the exact end-to-end signal-to-interference-plus-noise ratio (SINR) of the communication system is formulated and upper bounded. Then, the cumulative distribution function (cdf) and probability density function (pdf) of the upper bounded end-to-end SINR are determined. Based on those results, closed-form expression for the error probability is obtained. Furthermore, an approximate expression for the pdf of the instantaneous end-to-end SINR is derived, and based on this, a simple and general asymptotic expression for the error probability is presented and discussed. In addition, the ergodic capacity of multihop wireless networks in the presence of external interference is studied. Moreover, analytical comparisons between AF and decode-and-forward (DP) multihop in terms of error probability and ergodic capacity are presented. Finally, optimization of the power allocation at the network´s transmit nodes and the positioning of the relays are addressed.
  • Keywords
    Rayleigh channels; amplify and forward communication; approximation theory; cochannel interference; decode and forward communication; error statistics; optimisation; radio networks; AF relaying; CDF; DP multihop; PDF; Rayleigh fading channels; SINR; amplify-and-forward relaying; approximate expression; cochannel interferences; cumulative distribution function; decode-and-forward multihop; design optimization; end-to-end signal-to-interference-plus-noise ratio; ergodic capacity; error probability; general asymptotic expression; multihop wireless networks; multihop wireless relaying systems; network transmit nodes; power allocation; probability density function; upper bound; Error probability; Interference; Relays; Resource management; Signal to noise ratio; Spread spectrum communication; Wireless networks; Amplify-and-forward (AF); cochannel interference; decode-and-forward (DF); ergodic capacity; error probability; multihop wireless networks; optimization; power allocation; relay positioning;
  • fLanguage
    English
  • Journal_Title
    Vehicular Technology, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9545
  • Type

    jour

  • DOI
    10.1109/TVT.2011.2179818
  • Filename
    6105581