RESUMENEn este artículo se diseña un sistema OFDM óptimo para la comunicación bidireccional en las redes eléctricas inteligentes. La transmisión se realiza simulando un canal con ruido clase A, el cual es característico de las líneas eléctricas de alto, medio y bajo voltaje.El sistema OFDM es óptimo porque se emplean constelaciones bidimensionales rotadas: rectangular, circular y hexagonal de cuatro y dieciséis símbolos que tienen mejores desempeños comparados a sus contrapartes que son las constelaciones sin rotar.El OFDM óptimo disminuye la probabilidad de error de bits como mínimo de 1x10 -2 cuando se comparan con OFDM-QAM, en un canal con ruido clase A.Palabras clave: OFDM, constelaciones rotadas, redes eléctricas inteligentes, ruido clase A. ABSTRACT In this article is designed a system OFDM optimal for the bi-directional communication at the smart grid. The transmission is simulating a channel with noise class A, what is characteristic of the electrical lines of high, medium and low voltage.The OFDM system is optimal because they employ two-dimensional constellations rotated: rectangular, circular and hexagonal of four and sixteen symbols that have the best performance compared to their counterparts who are the constellations without rotating.The optimal OFDM decreases the likelihood of error of bits as minimum of 1x10 -2 when compared with OFDM-QAM, on a channel with noise class A.
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