SER-Based Relay Selection for Two-Way Relaying with Physical Layer Network Coding

ETRI Journal

关键词: physical layer network coding (PNC);    minimum distance;    SER;    relay selection;    Two-way relay;   

Others  :  1196759
DOI  :  10.4218/etrij.13.0212.0211

【 摘 要 】

To enhance the symbol error rate (SER) performance of the two-way relay channels with physical layer network coding, this letter proposes a relay selection scheme, in which the relay with the maximal minimum distance between different points in its constellation among all relays is selected to assist two-way transmissions. We give the closed-form expression of minimum distance for binary phase-shift keying and quadrature phase-shift keying. Additionally, we design a low-complexity method for higher-order modulations based on look-up tables. Simulation results show that the proposed scheme improves the SER performance for two-way relay networks.

   

【 参考文献 】

• [1]R. Ahlswede et al., "Network Information Flow," IEEE Trans. Inf. Theory, vol. 46, July 2000, pp. 1204-1216.
• [2]S. Katti, S. Gollakota, and D. Katabi, "Embracing Wireless Interference: Analog Network Coding," Proc. ACM SIGCOMM, 2007, pp. 397-408.
• [3]S. Zhang et al., "Hot Topic: Physical-Layer Network Coding," Proc ACM MobiComm, 2006, pp. 358-365.
• [4]S.C. Liew, S. Zhang, and L. Lu, "Physical-Layer Network Coding: Tutorial, Survey, and Beyond," submitted to Physical Commun. http://dx.doi.org/10.1016/j.phycom.2012.05.002
• [5]M.C. Ju and I.-M. Kim, "Relay Selection with Physical-Layer Network Coding," Proc. IEEE GLOBECOM, 2010, pp. 1-5.
• [6]Y. Liu et al, "Single Relay Selection for Bidirectional Cooperative Networks with Physical-Layer Network Coding," ETRI J., vol. 34, Feb. 2012, pp. 102-105.
• [7]D. Li et al., "SER Minimized Relay Selection for Physical Layer Network Coding in Two-Way Relay Channels," Procedia Eng., vol. 15, Aug. 2011, pp. 1921-1925.
• [8]A. Goldsmith, Wireless Communications, New York: Cambridge University Press, 2005.
• [9]A. Bletsas et al., "A Simple Cooperative Diversity Method Based on Network Path Selection," IEEE J. Sel. Areas Commun., vol. 24, Mar. 2006, pp. 659-672.