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Fast antenna subset selection algorithms for multiple-input multiple-output relay systems

Fast antenna subset selection algorithms for multiple-input multiple-output relay systems

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  • Author(s): G. Zhang 1 ; G. Li 1 ; J. Qin 2
    • View affiliations
    • Affiliations: 1: Faculty of Information Engineering, Guangdong University of Technology, Guangzhou, China
      2: Department of Electronic and Communication Engineering, Sun Yat-Sen University, Guangzhou, China
  • Source: Volume 3, Issue 11, November 2009, p. 1693 – 1703
    DOI:  10.1049/iet-com.2009.0013 , Print ISSN 1751-8628, Online ISSN 1751-8636
© The Institution of Engineering and Technology
Published

The antenna subset selection technique balances the performance and hardware cost in the multiple-input multiple-output (MIMO) systems, and the problems on the antenna selection in MIMO relay systems have not been fully solved. This paper considers antenna selection on amplify-and-forward (AF) and decode-and-forward (DF) MIMO relay systems to maximise capacity. Since the optimal antenna selection algorithm has high complexity, two fast algorithms are proposed. The selection criterion of the algorithm for AF relay is to maximise a lower bound of the capacity, but not the exact capacity. This criterion reduces algorithmic complexity. The algorithm for DF relay is an extension of an existing antenna subset selection algorithm for one-hop MIMO systems. The authors show the derivations of the algorithms in detail, and analyse their complexity in terms of numbers of complex multiplications. Simulation results show that the proposed algorithms for both cases achieve comparable performance to the optimal algorithm under various conditions, and have decreased complexity.

Inspec keywords: radiocommunication; MIMO communication; MIMO systems; communication complexity; antennas

Other keywords: fast antenna subset selection algorithms; decode-and-forward relay systems; amplify-and-forward relay systems; multiple-input multiple-output relay systems; MIMO systems

Subjects: Single antennas; Communication system theory; Radio links and equipment

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