Marco teorico de la contaminacion del agua en guatemalaDescripción completa
Descripción: marco teorico
Descripción: tesis
Descripción: marco teorico
investigacion sobre energia hidráulica
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Descripción completa
Marco teorico de la contaminacion del agua en guatemala
Descripción: ANTEPROYECTO LILI
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Descripción completa
TRA AMIENTO DIGITAL DE SEÑALES
ÓDIGO: 208052A_474 FASE 2
UNI AD 1: TRABAJO COLABORATIVO
Presentado a: MAU ICIO ALBERTO GARCIA (Tutor)
Entregado por: JUA SEBASTIAN DIAZ HERNANDEZ Código: 1116259198 EDWIN GUERRERO PERDOMO Código: 1113641124 PAOLA ANDREA CORREA Código: 1116253104
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INTRODUCCIÓN En el siguiente infor e se encuentra planteado definici nes sobre conceptos básicos de s ñales las cuales ayudaran mejor la c mprensión de cada uno de los ejercicios propuestos por la guia de actividades, se realiz realiza a inform informe e respec respectt al desarrollo de problemas basados n distintos tema temas s como como el el mues muestr tre eo de una una señal señal y la cubaniz cubanizació ación n par realizar el proceso de ejecucion sobre una señal y digitalización.
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PREGUNTAS TEÓRICAS a. ¿Qué es una señal uestreada? Es una señal cuya a plitud tiene valor sólo en instantes iscretos de tiempo, permitiendo bajo ciertas ciertas condiciones, condiciones, representa representa una señal continúa por medio de un una a señ señal al disc discre reta ta,, qu que con consi si te en sus muestras igualmente espaciadas (T=período de muestreo).
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de una señal muestreada a uno de los valores discretos de la señal digital. Codi Codifi fica car: r: cons consist ist en trad traduc ucir ir los los valo valores res cuan cuanti tifi fica cad d s a código binario, u otros c digos digitales.
d.¿ d. ¿Cuál es el fenóme o alias o aliasing? A medida que la fr cuencia aumenta, el numero de m estras por período va disminuyendo, do, has hasta ta el punt punto o en en qu que úni única cam me te hay una muestra por periodo. Cuando esto sucede, no es posible reconstruir la forma de onda de la eñal, se produce entonces el error de aliasing. El analizador interpreta que la la frecue frecuenci ncia a de la seña señall es much mucho mas baja que la real. Este rror se llama aliasing (“Alias” o frecuencia fant fantas asm ma). a). Par Para a ev evit r est este e prob problem lema a tod todos os los los ana anali liza zado dorr s disponen de un filtro llamado ntialiasing que permite limitar los c mponentes de frecuencia de la seña señall de de ent entra rada da adec adecuá uánd ndo olos a las
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la evolución de la s ñal entre muestras que no esté pe fectamente definido por la serie t tal de muestras.
f. ¿Qué es frecuencia de muestreo? Es la máxima frecue cia que es posible recuperar de una señal dado un intervalo de mu streo fijo ∆t, La frecuencia de muestreo nos permite dar control al manejo de la señal, siendo na mayor frec frecue uenci ncia a el gar garan antt a una una mejo mejorr repr reprod oduc ucci ción ón de de señ señ l y menor perdida de informaci n. Es decir, Es la frecuencia máxima que puede estar presente en la eñal analógica sin analógica sin que se produzca aliasing iasing en en la señal discretizada.
g.¿Q g. ¿Qué ué es el anch ancho o d banda? El ancho de banda stá directamente relacionado con la cantidadde información que puede uede pasar pasar a trav través és de de él. él. E términos matemáticos, su valor indica cuantas armónicas del d sarrollo en
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Y para g[n]=x[-n]
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Anexo 1 1. Preguntas teóricas: a.
¿Qué es una señal muestreada?
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es la la frec frecue uenc ncia ia maxi maxim m de operacion de un componente ya que gracias a es esto po podremos da darn s cuenta a cuanta capacidad podra trabajar el componente. h. ¿Cuál es la diferencia entre el teorema de muestreo y el eorema de Nyquist Shannon? la dif difer eren enci cia a prin princi cipa pall del teorema de muestreo es que a di erencia del teorema de de ny nyquist ut utiliza la multiplicacion por un tren de impulsos y
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Figura 3:
peración ideal de muestreo
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presente fe fenómeno al ali s. 2. ¿Se presenta fenómeno alias o aliasing si x(t) es es muestre da a S=12.5k Hz? Explique paso a paso si presenta alias, encuentre la frecuencia fa Ejercicio 5:
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