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- W1965255283 abstract "Optimum power allocation improves the efficiency of wireless systems. While optimizing the average received SNR would directly result in an optimized average BER in a non-relaying system, it is not clear whether we can achieve an optimized average BER in a relaying system by optimizing the average SNR at the destination terminal. In this paper, the problem of power allocation in a single-relay wireless system with maximal ratio combining (MRC) at the destination terminal is investigated via optimizing two different objective functions: average SNR and average BER. The average SNR and average BER expressions are derived for an amplify-and-forward relaying protocol with MRC at the destination as a function of source and relay transmit powers. Based on the derived SNR and BER expressions at the destination, closed-form expressions are derived for optimum transmit power of source and relay. It is observed that the BER-based power allocation scheme achieves considerable performance improvement over the SNR-based scheme when the relay is closer to the source than destination." @default.
- W1965255283 created "2016-06-24" @default.
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- W1965255283 date "2010-01-01" @default.
- W1965255283 modified "2023-10-01" @default.
- W1965255283 title "SNR-based vs. BER-based power allocation for an amplify-and-forward single-relay wireless system with MRC at destination" @default.
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- W1965255283 doi "https://doi.org/10.1109/bsc.2010.5472969" @default.
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