Assignment2 - School of Electrical Engineering and Computer...

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School of Electrical Engineering and Computer Science CNT 3004: Computer Network Concepts (Spring 2009) Assignment 2 (Due date: Wednesday 02/11/09 in class) Name: ______________________________________ PID: ____________________ 1. Television channels are 6 MHz wide. How many bits/sec can be sent if four-level digital  signals are used? Assume a noiseless channel. (6 points)   2. If a binary signal is sent over a 3 KHz channel whose signal-to-noise-ratio is 20 dB. What  is the maximum achievable data rate? (6 points) 1
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3. A device is sending out data at the rate of 100 Mbps. How long does it take to send a file  of 18 Mbits? How long does it take to send a file of 3,240 characters? (6 points) 4. A  periodic   composite   signal  contains   frequencies   from  20   to   100  KHz,   each   with  amplitude of 5 V. Draw the frequency spectrum. What is the bandwidth of the signal? (7  points) 5. A non-periodic composite signal contains frequencies from 20 to 100 KHz. The peak 
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Assignment2 - School of Electrical Engineering and Computer...

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