Outage Analysis of OFDM-Based Dual-hop Multi-Relay Systems with Best Relay Selection 


Vol. 35,  No. 5, pp. 487-494, May  2010


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  Abstract

This paper presents an OFDM-based dual-hop multi-relay system with best relay selection maximizing the mutual information. For the system either with decode-and-forward (DF) relays or with amplify-and-forward (AF) relays, we derive a lower-bound on the outage probability and the diversity order achievable in frequency selective fading channels and provide the outage capacity from simulation. Performance evaluation shows that both DF and AF provide the same diversity order as in the lower-bound but DF of which the outage probability is much closer to the lower-bound provides a better outage capacity than AF. It is also observed that the SNR gain of DF over AF gets larger as either the number of resolvable multipaths or the number of relay candidates increases, which makes DF relaying more favorable to the OFDM-based multi-relay system.

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  Cite this article

[IEEE Style]

J. C. Park, J. S. Wang, J. H. Lee, Y. H. Kim, "Outage Analysis of OFDM-Based Dual-hop Multi-Relay Systems with Best Relay Selection," The Journal of Korean Institute of Communications and Information Sciences, vol. 35, no. 5, pp. 487-494, 2010. DOI: .

[ACM Style]

Jae Cheol Park, Jin Soo Wang, Ji Hye Lee, and Yun Hee Kim. 2010. Outage Analysis of OFDM-Based Dual-hop Multi-Relay Systems with Best Relay Selection. The Journal of Korean Institute of Communications and Information Sciences, 35, 5, (2010), 487-494. DOI: .

[KICS Style]

Jae Cheol Park, Jin Soo Wang, Ji Hye Lee, Yun Hee Kim, "Outage Analysis of OFDM-Based Dual-hop Multi-Relay Systems with Best Relay Selection," The Journal of Korean Institute of Communications and Information Sciences, vol. 35, no. 5, pp. 487-494, 5. 2010.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880