Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Double Opportunistic Transmit Cooperative Relaying System with GSC in Rayleigh Fading Channels

  • Kim, Nam-Soo (Department of Computer and Communication Engineering, Cheongju University) ;
  • Lee, Ye-Hoon (Department of Electronic and Information Engineering, Seoul National University of Science & Technology)
  • Received : 2010.09.29
  • Published : 2010.12.31
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Abstract

In a conventional opportunistic transmit (COT) cooperative relaying system, only the relays that receive signal-to-noise ratio (SNR) from the source and that exceed the threshold transmit to the destination. The COT system, however, only considers the SNR of the source-relay (S-R) path regardless that the SNR of the relay-destination (R-D) path is the opportunistic transmission condition. For that reason, it is not guaranteed that all the transmitted signals from relays exceed the threshold at the destination. Therefore we propose a double opportunistic transmit (DOT) cooperative relaying system - when both of the received SNR from a source and from a destination exceed the threshold, the relay transmits to the destination. It is shown that the proposed DOT system reduces power consumption by 6.9, 20.9, 32.4, and 41.4 % for K =3, 5, 7, and 9, respectively under the given condition of $P_{out}=1{\times}10^{-3}$ and $\overline{\gamma}_{SR}/\Gamma_{SR}$=30 dB, compared to the COT system. We noticed that the performance of the DOT system is superior to that of the COT system for the identical number of active transmit relays under the same condition of the normalized average SNR of $\overline{\gamma}_{RD}/\Gamma_{RD}$.

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References

  1. M. Barbeau, E. Kranakis, Principles of Ad Hoc Networking, John Wiley & Sons Ltd., 2007.
  2. M. Hasna, M. -S. Alouini, "Performance of two-hop relayed transmissions over Rayleigh fading channels," in Proceedings of Vehicular Technology Conference 2002, vol. 4, pp. 1992-1996, Sep. 2002.
  3. J. N. Lanememan, G. W. Wornell, "Energy efficient antenna sharing and relaying for wireless networks," in Proceedings of WCNC2000, vol. 1, pp. 7-12, Sep. 2000.
  4. V. Emamian, P. Anghel, and M. Mostafa Kaveh, "Multiuser spatial diversity in a shadow-fading environment," in Proceedings of Vehicular Technology Conference 2002-Fall, vol. 1, pp. 573-576, Sep. 2002.
  5. P. A. Anghel, M. Kaveh, "Exact symbol error probability of a cooperative network in Rayleigh-fading environment," IEEE Trans. on Wireless Communi., vol. 1, no. 5, pp. 1416-1421, Sep. 2004. https://doi.org/10.1109/TWC.2004.833431
  6. N. C. Beaulieu, J. Hu, "A closed form expression for the outage probability of decode-and-forward relaying in dissimilar Rayleigh fading channels," IEEE Communi. Letters, vol. 10, no. 12, pp. 813-815, Dec. 2006. https://doi.org/10.1109/LCOMM.2006.061048
  7. Y. Zhio, R. Adve, and T. Lim, "Outage probability at arbitrary SNR with cooperative diversity," IEEE Communi. Letters, vol. 9, no. 8, pp. 700-702, Aug. 2005. https://doi.org/10.1109/LCOMM.2005.1496587
  8. T. Eng, N. Kong, and L. B. Milstein, "Comparison of diversity combining techniques for Rayleigh-fading channels," IEEE Trans. on Communi., vol. COM-44, no. 9, pp. 1117-1129, Sep. 1996. https://doi.org/10.1109/26.536918
  9. H. Yang, M-S Alouini, "MRC and GSC diversity combining with outage threshold," IEEE Trans. on Vehicular Technol., vol. 54, no. 3, pp. 1081-1090, May 2005. https://doi.org/10.1109/TVT.2005.844634
  10. Hong-Chuan Yang, "New result on ordered statistics and analysis of minimum-selection generalized selection combining(GSC)," IEEE Trans. on Wireless Communi., vol. 5, no. 7, pp. 1876-1885, Jul. 2006. https://doi.org/10.1109/TWC.2006.1673099
  11. Andrea Goldsmith, Wireless Communications, Cambridge University Press, 2005.
  12. M. K. Simon, M-S Alouini, Digital Communications Over Fading Channels, John Wiley & Sons, 2000.
  13. D. Gesbert, M-S Alouini, "How much feedback is multi-user diversity really worth?" in Proceedings of IEEE International Conference on Communications( ICC), pp.234-238, Jun. 2004.