Channel re-estimation in OFDM systems with constellation rotation

  • Authors:

  • P. Trifonov;W. Zirwas

  • Affiliations:

  • Saint-Petersburg State Polytechnic University, Saint-Petersburg, Russia;Nokia Siemens Networks GmbH & Co KG, Munich, Germany

  • Venue:
  • RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
  • Year:
  • 2009

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Abstract

The problem of channel estimation in MIMO-OFDM systems with multi-channel ARQ is considered. It is shown that one can improve the accuracy of channel estimates by re-using correctly decoded data. Constellation rotation method is proposed to improve the accuracy of channel estimates.