Consider a link between two nodes. This link uses a transmission

bandwidth of 1MHz. The transmitter wishes to digitize and send an analog video

data of 4 MHz bandwidth at 20mW. The signal through the medium experiences

an attenuation (or loss) of 60 dB. So, the link provider uses an amplifier before

the signal is received by the receiver. The amplifier doubles the input power such

that Pout = 2xPin, where Pout and Pin are measured in Watts. Assume a receiver

noise of -74dBm.

1. What is the SNR (in dB) at the receiver?

2. What is the Shannons capacity for that link? If we use a 32-level digital

signal on that link, what is the Nyquist rate? Is this video data transmission

possible on this medium?

3. For the Shannons capacity in (b), find the number of signaling levels based on

Nyquists formula