Two-way CSI-assisted AF relaying with HPA nonlinearity

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Qi, Jian ; Aissa, Sonia ; Alouini, Mohamed-Slim (2015)
  • Publisher: IEEE
  • Related identifiers: doi: 10.1109/ICC.2015.7248560
  • Subject:
    arxiv: Computer Science::Information Theory | Computer Science::Networking and Internet Architecture

In this paper, we investigate half-duplex two-way dual-hop channel state information (CSI)-assisted amplify-and-forward (AF) relaying in the presence of high-power amplifier (HPA) nonlinearity at relays. The expression for the end-to-end signal-to-noise ratio (SNR) is derived as per the modified system model by taking into account the interference caused by relaying scheme and HPA nonlinearity. The system performance of the considered relaying network is evaluated in terms of average symbol error probability (SEP) in Nakagami-$m$ fading channels, by making use of the moment-generating function (MGF) approach. Numerical results are provided and show the effects of several parameters, such as quadrature amplitude modulation (QAM) order, number of relays, HPA parameters, and Nakagami parameter, on performance.
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