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dc.contributor.authorSantamaría Caballero, Luis Ignacio 
dc.contributor.authorCrespo Bofill, Pedro M.
dc.contributor.authorLameiro Gutiérrez, Christian 
dc.contributor.authorSchreier, Peter J.
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.description.abstractNon-circular or improper Gaussian signaling has proven beneficial in several interference-limited wireless networks. However, all implementable coding schemes are based on finite discrete constellations rather than Gaussian signals. In this paper, we propose a new family of improper constellations generated by widely linear processing of a square M-QAM (quadrature amplitude modulation) signal. This family of discrete constellations is parameterized by κ, the circularity coefficient and a phase ϕ. For uncoded communication systems, this phase should be optimized as ϕ∗(κ) to maximize the minimum Euclidean distance between points of the improper constellation, therefore minimizing the bit error rate (BER). For the more relevant case of coded communications, where the coded symbols are constrained to be in this family of improper constellations using ϕ∗(κ), it is shown theoretically and further corroborated by simulations that, except for a shaping loss of 1.53 dB encountered at a high signal-to-noise ratio (snr), there is no rate loss with respect to the improper Gaussian capacity. In this sense, the proposed family of constellations can be viewed as the improper counterpart of the standard proper M-QAM constellations widely used in coded communication systems.es_ES
dc.description.sponsorshipThe work of Pedro M. Crespo and Ignacio Santamaria has been partially supported by the Ministerio de Economía y Competitividad (MINECO) of Spain and Agencia Estatal de Investigación (AEI)/(European Fund for Economic and Regional Development) FEDER funds of the E.U., under Grants TEC2013-47141-C4-R (RACHEL), TEC2016-75067-C4-4-R (CARMEN). The work of Christian Lameiro and Peter J. Schreier was supported by the German Research Foundation (DFG) under Grants LA 4107/1-1 and SCHR 1384/6-1.es_ES
dc.format.extent22 p.es_ES
dc.rightsAtribución 4.0 Internacionales_ES
dc.sourceEntropy, 2018, 20(1), 45es_ES
dc.subject.otherImproper signalses_ES
dc.subject.otherMutual informationes_ES
dc.subject.otherGaussian noise channelses_ES
dc.subject.otherDiscrete constellationses_ES
dc.titleInformation-theoretic analysis of a family of improper discrete constellationses_ES

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Atribución 4.0 InternacionalExcept where otherwise noted, this item's license is described as Atribución 4.0 Internacional