<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1815-5928</journal-id>
<journal-title><![CDATA[Ingeniería Electrónica, Automática y Comunicaciones]]></journal-title>
<abbrev-journal-title><![CDATA[EAC]]></abbrev-journal-title>
<issn>1815-5928</issn>
<publisher>
<publisher-name><![CDATA[Universidad Tecnológica de La Habana José Antonio Echeverría, Cujae]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1815-59282023000100001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Diseño de un sistema de comunicación de voz usando DC-PLC basado en modulación BFSK]]></article-title>
<article-title xml:lang="en"><![CDATA[Design of a voice communication system using DC-PLC based on BFSK modulation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez Gómez]]></surname>
<given-names><![CDATA[Wagner]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera Fonseca]]></surname>
<given-names><![CDATA[Yosbel J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lavandera Rodríguez]]></surname>
<given-names><![CDATA[Ismael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdés Zaldívar]]></surname>
<given-names><![CDATA[EnriqueErnesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigaciones y Desarrollo Tecnológico  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigaciones de la Microelectrónica  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<volume>44</volume>
<numero>1</numero>
<fpage>1</fpage>
<lpage>16</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1815-59282023000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1815-59282023000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1815-59282023000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se abordan los conceptos fundamentales en el diseño de un sistema de comunicaciones de voz utilizando los principios de funcionamiento de las comunicaciones por línea de potencia de corriente de directa (DC-PLC: Direct Current - Power Line Communications) basado en una modulación BFSK. El sistema se compone de un subsistema de transmisión y de un subsistema para la recepción de la señal de voz, estos elementos se interconectan entre sí a través de un canal de DC-PLC referido a un par trenzado de cobre. El subsistema de transmisión realiza las funciones asociadas al acondicionamiento, la digitalización, y el procesamiento de la señal para su transferencia digital con una modulación BFSK en el canal de comunicación. En el subsistema de recepción se lleva a cabo la demodulación BFSK, el procesamiento y la recuperación nuevamente de la señal de voz para su supervisión. Se propone para ambos subsistemas un diseño basado en el empleo de microcontroladores con núcleo 8051 de la familia Silicon Laboratories. El periférico UART disponible en los microcontroladores 8051 se emplea para la transferencia de los datos digitales y es aplicable como método de transmisión en el tipo de canal DC-PLC. Además, se presentan y exponen los criterios de diseño de los circuitos internos a través de sus esquemas eléctricos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This work addresses the fundamental concepts in the design of a voice communications system that uses the operating principles of direct current power line communications (DC-PLC: Direct Current - Power Line Communications) based on BFSK modulation. The system is composed of a transmission subsystem and a voice signal reception subsystem, these elements are interconnected through a DC-PLC channel referenced to a twisted copper pair. The transmission subsystem performs the functions associated with the conditioning, digitization and processing of the signal for its digital transfer with a BFSK modulation in the communication channel. The receiving subsystem performs the BFSK demodulation, processing and recovery of the voice signal for monitoring. For both subsystems a design based on the use of Silicon Laboratories 8051 core microcontrollers is proposed. The UART peripheral available in the 8051 microcontrollers is used for digital data transfer and is applicable as a transmission method in the DC-PLC channel type. In addition, the design criteria of the internal circuits are presented and exposed through their electrical schematics.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Voz]]></kwd>
<kwd lng="es"><![CDATA[DC-PLC]]></kwd>
<kwd lng="es"><![CDATA[modulación BFSK]]></kwd>
<kwd lng="es"><![CDATA[microcontroladores 8051]]></kwd>
<kwd lng="en"><![CDATA[Voice]]></kwd>
<kwd lng="en"><![CDATA[DC-PLC]]></kwd>
<kwd lng="en"><![CDATA[BFSK modulation]]></kwd>
<kwd lng="en"><![CDATA[8051&#8217;s microcontroller]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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