Question: 1 . [ 1 5 pts ] A DSB - SC modulated signal is transmitted over a noisy channel, with the power spectral density of

1 . [15

pts

]

A DSB

-

SC modulated signal is transmitted over a noisy channel, with the power spectral density of the noise as shown in the figure below. The message bandwidth is

4

kHz and the carrier frequency is

200

kHz

.

Assume that the average received power of the signal is

- 80

dBm and determine the output signal

-

-

noise ratio of the receiver.

1 . [ 1 5 pts ] A DSB - SC modulated signal is

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