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. 2018 Feb 10;18(2):536. doi: 10.3390/s18020536

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Required transmission power at BS according to $α$ when $N = 2$ and $N_{r} = 2$ .