Impact of Imperfect Channel State Information on Bi-Directional Communications With Relay Selection

  • Authors:
  • Zhiguo Ding;Kin K. Leung

  • Affiliations:
  • School of Electrical, Electronic and Computer Engineering, Newcastle University, UK;Dept. of Electrical and Electronic Engineering, Imperial College, London, UK

  • Venue:
  • IEEE Transactions on Signal Processing
  • Year:
  • 2011

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Abstract

In this correspondence, we study the effect of channel estimation error to the reception reliability for decode–forward based two-way relaying and physical layer network coding. In particular, we focus on the scenario where the channel estimation error is inversely proportional to signal-to-noise ratio (SNR). To such a scenario, analytic results have been developed to show that symbol error probability can approach zero by increasing SNR and extra diversity gains can still be achieved by applying relay selection.