Abstract
In this chapter, we investigate power adaptation policies at the relay for cooperative one-way and two-way half-duplex amplify-and-forward systems. Specifically, by assuming Gaussian codebooks at the source nodes and full channel information at the relay, optimal amplification coefficients are derived to maximize the achievable rate or sum rate under a long-term average power constraint. Simulation results reveal that the proposed schemes provide significant rate benefits over the systems using the conventional fixed-gain and channel-inversion coefficients. The gain is more pronounced in low power regimes.
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Rodríguez, L.J., Tran, N., Le-Ngoc, T. (2015). Half-Duplex AF Relaying: Adaptation Policies. In: Amplify-and-Forward Relaying in Wireless Communications. SpringerBriefs in Computer Science. Springer, Cham. https://doi.org/10.1007/978-3-319-17981-0_5
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DOI: https://doi.org/10.1007/978-3-319-17981-0_5
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-17980-3
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