Question: Repeat Problem P4-3 for the NRZ-I scheme. Problem 4-3 Draw the graph of the NRZ-L scheme using each of the following data streams, assuming that

Repeat Problem P4-3 for the NRZ-I scheme.

Problem 4-3

Draw the graph of the NRZ-L scheme using each of the following data streams, assuming that the last signal level has been positive. From the graphs, guess the bandwidth for this scheme using the average number of changes in the signal level. Compare your guess with the corresponding entry in Table 4.1.

Category Scheme Bandwidth Characteristics (average) B= N/2 Unipolar Costly, no self-synchronization if long 0Os or 1s, DC No self-synchronization if long Os or Is, DC No self-synchronization for long Os, DC Self-synchronization, no DC, high bandwidth No self-synchronization for long Os, DC No self-synchronization for long same double bits NRZ NRZ-L B= N/2 B= N/2 B= N B= N/2 Polar NRZ-I Biphase ipolar AMI 2B1Q B= N/4 Multilevel Self-synchronization, no DC Self-synchronization, no DC No self-synchronization for long Os 8B6T B= 3N/4 4D-PAM5 B= N/8 Multitransition MLT-3 B= N/3

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