Apoyo al estudio de temas avanzados de comunicaciones by Eva María Arias de Reyna Domínguez

By Eva María Arias de Reyna Domínguez

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1 Ecualizador Zf Ecualizador Zero Forcing (ZF) v(m1) ---1 Para el diseño: ausencia de ruido Ho(w) = Gr(w)Hc(w)HR(w)Heq(w) 151 nula{::? h 0 (nT) 1 ={ O ~ n =O 2r. :, T <=> L ni= O, n E Z Una solución: Heq(w) = rr 1 . \ rr lwl 1 . N+1--+® 1 ! CN ¿ --+® ! -. Cn exp(. v Ecualización 16147 ~ 58 ~ ~ ~ ~ ~ ~ ~ Ecualizador Zero Forcing (ZF) e N ho(t) = p(t) * heq(t) = L ~ ~ ~ enp(t- nT) n=-N ~ ~ ~ ~ ~ ~ ~ (!! (!! (!! ,±N ~ ~ ~ f! f! f! f! 1 Ecualizador ZF ~ ~ ~ ~ Ecualizador Zero Forcing (ZF) N L enp((m- n)T) = ho(mT) n=--iV p(-T) p(O) p(T) p(O) p(T) p(2T) p(2iVT) p(-2NT) p(( -2N + 1)T) p(( -2N + 2)T) o eo e1 + 1 ecuaciones, 2N -+PCopt = ho ==?

Tránsrnisión de señales a· través de canales limitados. ~! , . } i . , Mntlnl:ulnr ~~ ·:T~ mT lóO Precodificador . {¡O bn = {bn} {dn} {an} {c,J {Cn} {bn} o -1 si Jcnl < 1 (1~n =O) si ICnl > 1 ('Cn- +')) ~-~ o o o o o 1 o -1 1 1 1 --2 -2 -2 -2 o 1 l 2 2 1 o -1 o o o -1 o 1 1 1 o o o l 1 Transmisión de 'señales a través de canales limitados en banda ... < si lcnl > o o {bn} o o o {dn} -1 -1 -1 {an} -2 -2 {en} -2 o {en} o 1 {bn} (en= o) (en= ±2) 1 1 1 1 1 o o o 2 2 o o o 1 o 1 1 1 1 1 o -1 o ~ t!

1 Ecualizador ZF ~ ~ ~ ~ Ecualizador Zero Forcing (ZF) N L enp((m- n)T) = ho(mT) n=--iV p(-T) p(O) p(T) p(O) p(T) p(2T) p(2iVT) p(-2NT) p(( -2N + 1)T) p(( -2N + 2)T) o eo e1 + 1 ecuaciones, 2N -+PCopt = ho ==? ~ ~ 1 incógnitas = p- 1ho =columna central de p-l Ecualización ~ ~ ~ 18/47 ~ ~ ~ ~ ~ ~ ~ ,. 005 ·r--- -··- : ---- - J 1 ' 1 . : ; : : ' ~ . ; :1 O Determinar los coeficientes de un filtro ecualizador ZF de 5 etapas que fuerza 2 ceros a cada lado del lóbulo principal de la respuesta 8 Calcular los valores muestra de la salida del ecualizador hasta ±3T.

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