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Kakitani, MT; Brante, G; Souza, RD; Imran, MA (2013)
Publisher: IEEE
Languages: English
Types: Article

Classified by OpenAIRE into

arxiv: Computer Science::Information Theory
We compare the downlink energy efficiency of spatial diversity multiple transmit antenna schemes. We determine the minimum required transmit power for a given outage probability. Our analysis shows that antenna selection is in general the most energy efficient option as it requires a single radio-frequency chain. We also investigate the limiting distances up to which the antenna selection technique outperforms the transmit beamforming scheme for different numbers of transmit antennas.
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