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. 2015 Oct 16;15(10):26396–26414. doi: 10.3390/s151026396

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© 2015 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 license (http://creativecommons.org/licenses/by/4.0/).

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The Percent Error Energy (PEE)-versus-signal-to-noise ratio (SNR) curves derived from the original noise-corrupted ECGs (blue), the software-based de-noised ECGs (green), and the hardware-based de-noised ECGs (red), respectively.