Cooperative space-time code for amplify-and-forward relay networks

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


In this paper, we propose a distributed space-time coded cooperative protocol with amplify-and-forward relaying. Motivated by protocol (III) presented in , we propose a distributed space-time coding for an arbitrary number of relay nodes. The pairwise error probability (PEP) is derived and the theory analysis demonstrates that our protocol achieves a diversity of order N +1 where N is the number of relay nodes. Quasi-orthogonal space-time codes are used as they give much better performance than random linear-dispersion codes. As the transmission power of the source node is a critical parameter in this protocol because it transmits in both phases, the optimal power allocation is derived using numerical and theoretical analysis. Simulation results demonstrate an improvement over the existing orthogonal protocols for different source-destination channel conditions.


  • Azzam Al-nahari
  • Fathi Abd El-Samie
  • Moawad Dessouky
External organisations
  • External Organization - Unknown
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering
Original languageEnglish
Title of host publication[Host publication title missing]
StatePublished - 2010
Externally publishedYes
Event18th IEEE Signal Processing and Communications Application Conference - Diyarbakir, Turkey
Duration: 2010 Apr 222010 Apr 24


Conference18th IEEE Signal Processing and Communications Application Conference