Performance analysis of maximum SNR scheduling with an infrastructure relay link

  • Riihonen T
  • Wichman R
  • Hämäläinen J
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We consider infrastructure-based amplify-and-forward (AF) relaying for
extending downlink and uplink coverage areas of a cellular base station.
The base station serves multiple mobile users via a multi-hop backhaul
relay link by sharing out access link channel resources with maximum
signal-to-noise ratio (SNR) scheduling. We analyze the performance of
the system by deriving closed-form expressions for outage probability,
outage capacity, ergodic capacity, average end-to-end SNR and amount of
fading (AoF). These measures show that maximum SNR scheduling of
multiple users in a cellular relay link offers significant diversity,
capacity and SNR improvement over single-user transmission and round
robin scheduling. We also relate performance of the relay link to that
of a distributed antenna system (DAS), and show that the noisy wireless
backhaul relay link induces tolerable performance deterioration compared
to deploying a cable-connected distributed antenna.

Author-supplied keywords

  • Amplify-and-forward
  • Mobile communication
  • Multi-user scheduling
  • Relay

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  • Taneli Riihonen

  • Risto Wichman

  • Jyri Hämäläinen

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