Log-Likelihood-Ratio based Selective Decode and Forward Cooperative Communication
Authors:
- R. Chembil PalatRPR. Chembil Palat
- A. AnnamalaiAAA. Annamalai
- Jeffrey H. ReedJRJeffrey H. Reed
- 1 May 2008
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 15502252,p. 615-618
Abstract
This paper presents exact ABER performance analysis for selective decode and forward (SDF) cooperative diversity system with BPSK modulation under Rayleigh fading where the relay has a MAP based receiver and the retransmission is based on log- likelihood-ratio (LLR) threshold. We also derive the optimum LLR threshold that minimizes ABER performance. It is shown that the LLR relay based SDF cooperative diversity system performs better than a SNR threshold based SDF system with lower implementation complexity than lambda-MRC and C-MRC schemes.Keywords
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