The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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New Cyclic Precoding Vectors for Open-loop Transmit Diversity Techniques

  • 이경재 (고려대학교 전기전자파공학부 무선통신 연구실) ;
  • 이흔철 (스탠포드대학교 전자공학과) ;
  • 이인규 (고려대학교 전기전자파공학부 무선통신 연구실)
  • Published : 2009.05.31
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Abstract

In this paper, we propose a new transmit diversity technique for multiple-input multiple-output (MIMO) systems to improve the link level performance of open-loop systems. By cyclically applying a predetermined set of preceding weight vectors, artificially induced fluctuation is created to achieve additional diversity gain in flat fading channels. To design the set of the precoding vectors, we exploit the knowledge on the distribution of near optimum Preceding vectors observed in a beamforming scheme based on the rotation transformations. Simulation results demonstrate that the proposed open-loop diversity scheme with an arbitrary number of transmit antennas achieves a full diversity gain with computational complexity comparable to a single-input single-output (SISO) system.

Keywords

References

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