Performance Analysis of Hybrid Decode-and-Forward Schemes for 2-hop Wireless Network 


Vol. 34,  No. 12, pp. 949-961, Dec.  2009


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  Abstract

This paper analyses BER (Bit Error Rate) performance of 2-hop wireless communications networks with hybrid decode-and-forward (HDF) relays. The conventional HDF method is usually based on the receive signal-to-noise ratio (SNR) for the relay to decide whether to forward the decoded data in order to obviate the erroneous detection at the relay. In contrast, we propose a new solution of using log-likelihood ratio (LLR) as an efficient alternative to SNR. The approximate BER expressions of different HDF schemes are also derived and verified by Monte-Carlo simulations. In addition, we compute the optimum thresholds for HDF schemes. A variety of numerical results demonstrate that the new LLR-based HDF significantly outperforms the SNR-based HDF for any threshold level and relay location under flat Rayleigh fading channel plus AWGN (Additive White Gaussian Noise).

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  Cite this article

[IEEE Style]

H. Kong, "Performance Analysis of Hybrid Decode-and-Forward Schemes for 2-hop Wireless Network," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 12, pp. 949-961, 2009. DOI: .

[ACM Style]

Hyung-Yun Kong. 2009. Performance Analysis of Hybrid Decode-and-Forward Schemes for 2-hop Wireless Network. The Journal of Korean Institute of Communications and Information Sciences, 34, 12, (2009), 949-961. DOI: .

[KICS Style]

Hyung-Yun Kong, "Performance Analysis of Hybrid Decode-and-Forward Schemes for 2-hop Wireless Network," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 12, pp. 949-961, 12. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880