ETRI Journal

  • 제33권5호
  • /
  • Pages.689-694
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  • 2011
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Performance of Two-User Two-Way Amplify-and-Forward Relaying Systems with Scheduling

  • Fang, Zhaoxi (School of Electronic and Information Engineering, Zhejiang Wanli University) ;
  • Li, Guosheng (School of Electronic and Information Engineering, Zhejiang Wanli University) ;
  • Li, Jun (School of Electronic and Information Engineering, Zhejiang Wanli University)
  • 투고 : 2010.10.22
  • 심사 : 2011.03.08
  • 발행 : 2011.10.31
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초록

In this paper, we study scheduling schemes for two-user two-way wireless relaying systems. Two transmission modes are considered: point-to-point direct transmission and two-way amplify-and-forward relaying. An optimal scheduling scheme that opportunistically selects the best transmission mode for each user is proposed to minimize the sum bit error rate (BER). The performance lower bound of the optimal scheduling scheme is analyzed, and closed-form expression of the lower-bound BER is derived. However, for optimal scheduling, the scheduler requires the knowledge of channel state information (CSI) of all links. To reduce the feedback information of CSI, we also propose a suboptimal scheduling scheme that selects the transmission mode using only the CSI of two direct links. Simulation results show that there are 4 dB to 8 dB gains for the proposed optimal and suboptimal schemes over the fixed direct transmission and fixed two-way relayed transmission scheme. The performance gap between the optimal and suboptimal scheduling schemes is small, which implies a good trade-off between implementation complexity and system performance.

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참고문헌

  1. R. Pabst, "Relay-Based Deployment Concepts for Wireless and Mobile Broadband Radio," IEEE Trans. Wireless Commun., vol. 42, Sept. 2004, pp. 80-89.
  2. J.N. Laneman, D.N.C. Tse, and G.W. Wornell, "Cooperative Diversity in Wireless Networks: Efficient Protocols and Outage Behavior," IEEE Trans. Inf. Theory, vol. 50, Dec. 2004, pp. 3062- 3080. https://doi.org/10.1109/TIT.2004.838089
  3. Y. Jing and B. Hassibi, "Distributed Space-Time Coding in Wireless Relay Networks," IEEE Trans. Wireless Commun., vol. 5, Dec. 2006, pp. 3524-3536. https://doi.org/10.1109/TWC.2006.256975
  4. P.A. Anghel and M. Kaveh, "On the Performance of Distributed Space Time Coding Systems with One and Two Nonregenerative Relays," IEEE Trans. Wireless Commun., vol. 5, Mar. 2006, pp. 682-692. https://doi.org/10.1109/TWC.2006.1611099
  5. Y. Zhao, R. Adve, and T.J. Lim, "Improving Amplify-and- Forward Relay Networks: Optimal Power Allocation versus Selection," IEEE Trans. Wireless Commun., vol. 6, Aug. 2007, pp. 3114-3123.
  6. O. Oyman, "Opportunism in Multiuser Relay Channel: Scheduling, Routing and Spectrum Reuse," in Proc. IEEE Int. Symp. Inform. Theory (ISIT), Nice, France, June 2007, pp. 286- 290.
  7. I. Krikidis and J.C. Belfiore, "Three Scheduling Schemes for Amplify-and-Forward Relay Enviroments," IEEE Commun. Lett., vol. 11, no. 5, May 2007, pp. 414-416. https://doi.org/10.1109/LCOMM.2007.070077
  8. Y.-U. Jang, W.-Y. Shin, and Y.H. Lee, "Multiuser Scheduling Based on Reduced Feedback Information in Cooperative Communications," VTC Spring, Barcelona, Apr. 2009, pp. 1-5.
  9. B. Rankov and A. Wittneben, "Spectral Efficient Protocols for Half-Duplex Fading Relay Channels," IEEE J. Select. Areas Commun., vol. 25, Feb. 2007, pp. 379-389. https://doi.org/10.1109/JSAC.2007.070213
  10. P. Popovski and H. Yomo, "Wireless Network Coding by Amplify-and-Forward for Bi-directional Traffic Flows," IEEE Commun. Lett., vol. 11, no. 1, Jan. 2007, pp. 16-18. https://doi.org/10.1109/LCOMM.2007.061436
  11. D. Gündüz, A. Goldsmith, and H.V. Poor, "MIMO Two-Way Relay Channel: Diversity-Multiplexing Trade-Off Analysis," Proc. Asilomar Conf. Signals, Syst. Comput., Pacific Grove, CA, Oct. 2008, pp. 1474-1478.
  12. W. Nam, S.-Y. Chung, and Y.H. Lee, "Capacity Bounds for Two-Way Relay Channel," Proc. Int. Zurich Seminar Commun., 2008, pp. 144-147.
  13. M.K. Simon and M.-S. Alouini, "A Unified Approach to the Performance Analysis of Digital Communication over Generalized Fading Channels," Proc. IEEE, vol. 86, Sept. 1998, pp. 1860-1877. https://doi.org/10.1109/5.705532