Performance Analysis of Decode-and-Forward Relaying Based on Optimal Relay Selection 


Vol. 33,  No. 1, pp. 36-43, Jan.  2008


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  Abstract

In this paper, we propose an optimal relay selection scheme for decode-and-forward relaying systems. The optimal relay selection minimizes the number of time slots used to relay source's signal and maximizes an end-to-end signal-to-noise ratio. However, decode-and-forward relaying systems require additional overhead for the optimal relay selection. Assuming independent and identically distributed Rayleigh fading channels, we provide exact and closed-form expressions for the outage probability of capacity and the bit error rate for decode-and-forward relaying systems with the optimal relay selection. It is shown that the analytic results are perfectly matched with the simulated ones. When the numbers of relay nodes are 2, 4, and 8, and the numbers of time slots for overhead are 1, 2, and 4, respectively, the proposed system achieves 1 ㏈, 2 ㏈, and 3 ㏈ gains at 1% bit error rate, respectively, and 0.5 ㏈, 4 ㏈, and 12 ㏈ gains at 1% outage probability for 1 bps/㎐, respectively, over the conventional decode-and-forward relaying system.

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  Cite this article

[IEEE Style]

I. Lee and D. Kim, "Performance Analysis of Decode-and-Forward Relaying Based on Optimal Relay Selection," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 1, pp. 36-43, 2008. DOI: .

[ACM Style]

In-Ho Lee and Dongwoo Kim. 2008. Performance Analysis of Decode-and-Forward Relaying Based on Optimal Relay Selection. The Journal of Korean Institute of Communications and Information Sciences, 33, 1, (2008), 36-43. DOI: .

[KICS Style]

In-Ho Lee and Dongwoo Kim, "Performance Analysis of Decode-and-Forward Relaying Based on Optimal Relay Selection," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 1, pp. 36-43, 1. 2008.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880