NAME:_____________________________________________________CS3363
Assume the case factor c is equal to ½ for any problem in this assignment. Use appropriate
engineering prefixes and units.
1. Calculate the signal rate for a line-coding scheme when r=4/3 and the data rate is 1-Mbps.
2. For a particular digital transmission, the sender clock is 2% faster than the receiving clock. If
the receiver detects 1Mb, how many bits were actually sent?
3. Propose a block- coding scheme for NRZ-I that will prevent a long consecutive set of zeros.
What is the efficiency of the block coding scheme and the max number of consecutive zeros?
4. Draw the graph for 01010101 using the Manchester scheme. Repeat for differential Manchester.
5. Assume the bits 11100000000000 are moving over a link (to the right) using AMI and B8ZS
scrambling. Draw the graph and assume the first non-zero signal is below the time axis.
6. What is the maximum number of consecutive zeros for the 4B/5B block coding scheme? (see
table 4.2 on page 111)
7. Calculate the Nyquist sample rate for a band-pass signal with a bandwidth of 200KHz and the
lowest frequency equal to 400KHz.
8. A band-pass analog signal is to be digitized. The highest frequency of this analog signal is
20KHz.
◦ What is the sample rate for this signal?
◦ If each sample has 16 bits, compute the number of quantization levels.
◦ Calculate the bit rate for this digitized signal.
◦ Calculate the signal to noise ratio (in db) for the digitized signal.
◦ This digital data is to be transmitted over a long distance using AMI with scrambling.
Calculate the baud rate requirement.
9. Describe each as they apply to digital transmission: baseline wandering, DC components, and
self-synchronization.
10. A band-pass signal is digitized. The highest frequency for this analog signal is 8KHz.
◦ What is the sample rate for this signal
◦ If the number of quantization levels is 256, find the number of bits per sample.
◦ Calculate the bit rate for this digitized signal.
◦ Calculate the signal to noise ratio in db for this digitized signal
◦ Calculate the baud rate if this digitized data is to be transmitted using Manchester linecoding.