Orthogonal decode and forward relaying with improved spectral efficiency

  • Authors:
  • K. V. Srinivas;K. Giridhar;R. D. Koilpillai

  • Affiliations:
  • Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India;Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India;Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India

  • Venue:
  • IEEE Communications Letters
  • Year:
  • 2009

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Abstract

Cooperative relay communications can significantly improve the reliability of data transmission over wireless fading channels by implementing spatial diversity in a distributed fashion. Orthogonal decode and forward (ODF) relaying achieves maximum diversity provided by the source-destination and relay-destination channels, but suffers from low spectral efficiency. We propose a novel ODF protocol having higher spectral efficiency without sacrificing the diversity gain. We analyze the symbol error probability of the proposed protocol and also present simulation results.