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Distributed Cyclotomic QOSTBC with Low End-to-End Delay for Full-Duplex Multi-relay Systems

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Abstract

In this paper, we propose a novel distributed space-time block coding (STBC) scheme for multi-relay system. We consider the full-duplex cooperation which is more spectrally efficient than the half-duplex cooperation. In full-duplex mode, the new scheme requires relay nodes to stack only every two successive symbols for swapping. Thus, the end-to-end delay may be lower than that induced by orthogonal STBC and conventional quasi-orthogonal STBC (QOSTBC) schemes. We show the new distributed STBC is capable of achieving cooperative diversity by using multi-dimensional rotated signal constellation. Besides, due to the simpler maximum-likelihood metric compared to that of conventional QOSTBC, the code achieves a lower decoding complexity without any performance degradation. To furthermore reduce complexity, the fast sphere decoder is adopted for the proposed code. The proposed transmission scheme is evaluated and compared in terms of performance by simulation.

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Authors and Affiliations

  1. College of Sciences, Nanjing Tech University, Nanjing, China

    Hua Jiang, Hao Cheng & Guoqing Liu

  2. College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China

    Lizhen Shen

Authors
  1. Hua Jiang
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  2. Hao Cheng
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  3. Lizhen Shen
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  4. Guoqing Liu
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Correspondence to Guoqing Liu.

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Jiang, H., Cheng, H., Shen, L. et al. Distributed Cyclotomic QOSTBC with Low End-to-End Delay for Full-Duplex Multi-relay Systems. Wireless Pers Commun 82, 2611–2621 (2015). https://doi.org/10.1007/s11277-015-2368-4

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