Decode-and-forward cooperative networks with multiuser diversity

  • Authors:
  • Zhihang Yi;Il-Min Kim

  • Affiliations:
  • Department of Electrical and Computer Engineering, Queen's University, Kingston, Ontario, Canada;Department of Electrical and Computer Engineering, Queen's University, Kingston, Ontario, Canada

  • Venue:
  • MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
  • Year:
  • 2006

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Abstract

In this paper, we first present a hard decision detector (HDD) for the cooperative networks with the decode-and-forward protocol. Compared to the optimum maximum likelihood (ML) estimator, the proposed HDD achieves the same diversity order while having much lower complexity. Based on the HDD, we propose a new scheme to combine the decode-and-forward protocol with the multiuser diversity. It is shown that the new scheme substantially increases the diversity order from approximately K/2 + 1 to K2/2 + 1, where K is number of relay terminals. Furthermore, an approximate expression of the average symbol error rate (SER) of the new scheme is derived.