Channel estimation for amplify-and-forward two-way relay network with power allocation

  • Authors:

  • Bin Jiang;Feifei Gao;Xiqi Gao;Arumugam Nallanathan

  • Affiliations:

  • National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China;School of Engineering and Science Electrical Engineering, Jacobs University, Bremen, Germany;National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China;King's College London, London, United Kingdom

  • Venue:
  • ICC'09 Proceedings of the 2009 IEEE international conference on Communications
  • Year:
  • 2009

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Abstract

In this work, we consider channel estimation for an amplify-and-forward (AF) two way relay network (TWRN), where two terminal nodes exchange information via a single relay node in between. A new concept of channel estimation by performing the power allocation at the relay node is introduced. As an example, we consider the maximum likelihood (ML) channel estimation at relay node and derive the power allocation factor such that the average effective signal-to-noise ratio (AESNR) at the terminal nodes is maximized. Nonetheless, the idea of using power allocation at relay node can be straightforwardly extended to more general scenarios. The simulation results show the advantages of the proposed method over the existing techniques.