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N (dBm)= -174 dBm + 10 log (30 x 10 6 ) N=-99,22 dBm L p (dB)=92.4+20log(3.4)+20log(20) L p (dB)=129.05 dB Fm=30log(60)+10log((6)x(4)x(0.125)x(6))-10log(1-0.9995)-70 Fm=28.90dB N=1.38x10 -23 x 563.15 x 20x10 6 N=1.55x10 -13 W N=-128 dBW

Problemas Cap 17

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Problemas Capitulo 17 tomassi

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Page 1: Problemas Cap 17

N (dBm)= -174 dBm + 10 log (30 x 106)

N=-99,22 dBm

Lp(dB)=92.4+20log(3.4)+20log(20)

Lp(dB)=129.05 dB

Fm=30log(60)+10log((6)x(4)x(0.125)x(6))-10log(1-0.9995)-70

Fm=28.90dB

N=1.38x10-23 x 563.15 x 20x106

N=1.55x10-13 W

N=-128 dBW

Page 2: Problemas Cap 17

C mínima= 30dB + (-115dBm)

C mínima=-85dBm

Pt=120dB+ (-85dBm)

Pt=35dBm

L=10log (1-0,9998)

L=-36.98 dB

L=10log ((6) x (0.25) x (0.125) x (4))

L= -1.249dB

Page 3: Problemas Cap 17

Fm= 30log(50)+10log((6) x (1) x (0.125) x (7.4)) - 10log (1-0.99999) -70

Fm= 38.412 dB

At=Ar=49.8dB

Lp= 92.4 + 20log (7.4) + 20log (50)

Lp = 143.76dB

Page 4: Problemas Cap 17

Lf= 4.7 x 2 (150m +50m)

Lf=9.4

Lb= 3+3 =6dB

B (ancho de banda) = 8284 kHz-564kHz= 7720kHz

N= -174 dBm + 10 log (7720 x 103)

N= -105.12dBm

C mínima = 30dB + (-105.12)

C mínima = -75.12dBm

Gs= 38.412 + 143.76 + 9.4 + 6 – 49.8 -49.8

Gs= 97.972 dB

Pt=97.972 + (-75.12)

Pt=22.85 dBm

Page 5: Problemas Cap 17

NFT= 4 + [(4-1)/10] + [(10-1) / (10x10)] + [(4-1) / (10x10x0.25)]

NFT=4.51

NFT=6.54dB

C mínima/N = 20dB + 4dB

C mínima/N= 24dB

C mínima= 24dB + (-102dBm)

C mínima= -78 dBm