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Diversity Analysis of Relay Selection Schemes for Two-Way Wireless Relay Networks

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Abstract

One-way wireless relay networks have recently received a lot of attention due to their ability to provide spatial diversity in fading wireless environment. Moreover, performing single-relay selection is a very attractive method due to its cost effective implementation and superior performance. However, one-way relay networks with the half-duplex signalling suffer from a spectral efficiency loss. To overcome such a drawback, two-way wireless relay networks have been proposed and these are also the networks considered in this paper. The paper analyzes the diversity orders of various relay selection schemes, including the best-relay selection, best-worse-channel selection, and maximum-harmonic-mean selection. The analysis is done for the amplify-and-forward protocol and under the two-step and three-step transmission procedures. In particular, it is shown that full diversity orders of R and R + 1 can be achieved in a R-relay wireless network with the two-step and three-step procedures, respectively. Numerical and simulation results are provided to verify our analysis.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, University of Saskatchewan, 57 Campus Dr., Saskatoon, SK, S7N 5A9, Canada

    Ha X. Nguyen & Ha H. Nguyen

  2. Department of Electrical and Computer Engineering, McGill University, 3480 University St., Montreal, QC, H3A 2A7, Canada

    Tho Le-Ngoc

Authors
  1. Ha X. Nguyen
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  2. Ha H. Nguyen
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  3. Tho Le-Ngoc
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Correspondence to Ha X. Nguyen.

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Nguyen, H.X., Nguyen, H.H. & Le-Ngoc, T. Diversity Analysis of Relay Selection Schemes for Two-Way Wireless Relay Networks. Wireless Pers Commun 59, 173–189 (2011). https://doi.org/10.1007/s11277-009-9911-0

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