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. 2018 Jul 26;8:11551. doi: 10.1038/s41598-018-29984-5

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) Exemplary in-phase (I) and quadrature (Q) signals for a time frame of 50 s and (b) the corresponding projection in the complex plane along with an estimated ellipse, which represents BB errors induced by impairments at the RF part of the system. (c) Error compensated complex representation and the unit circle as ideal projection of a moving target.