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1.4

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  • 1. Restricción de ancho de banda Nyquist  Restricción Nyquist:  El ancho de banda mínimo teórico requerido para detectar Rs [símbolos/s] sin ISI es Rs/2 [Hz].  Equivalentemente, un sistema con un ancho de banda W=1/2T=Rs/2 [Hz] puede sostener una tasa máxima de transmisión de 2W=1/T=Rs [símbolos/s] sin ISI.  Eficiencia espectral, R/W [bits/s/Hz] :  Medida importante para clasificar sistemas, representando caudal de datos por Hz.  Muestra cuan eficientemente se usa el ancho de banda.